Chinese Physics Letters最新文献

{"title":"Dual MAPK Inhibition Triggers Pro-inflammatory Signals and Sensitizes BRAF ^V600E Glioma to T Cell-Mediated Checkpoint Therapy.","authors":"Yao Lulu Xing, Stefan Grossauer, Jong-Whi Park, Emon Nasajpour, Brandon Bui, Daniella Morales, Dena Panovska, Jeffrey J Nirschl, Zhi-Ping Feng, Ruolun Wei, Katharina Koeck, Wes Thomason, Joanna Xiu, Patrick N Harter, Katharina Filipski, Kelly Mahaney, Xuhuai Ji, Jean M Mulcahy Levy, Gerald A Grant, Laura M Prolo, Kyle M Walsh, Michael Lim, Dolores Hambardzumyan, Claudia K Petritsch","doi":"10.1101/2023.02.03.526065","DOIUrl":"10.1101/2023.02.03.526065","url":null,"abstract":"<p><p>BRAF ^V600E pediatric low-grade gliomas frequently transform into high-grade gliomas (HGG) and poorly respond to chemotherapy, resulting in high mortality. Although combined BRAF and MEK inhibition (BRAFi+MEKi) outperforms chemotherapy, ∼70% of BRAF ^V600E HGG patients are therapy resistant and undergo unbridled tumor progression. BRAF ^V600E glioma have an immune-rich microenvironment suggesting that they could be responsive to immunotherapy but effects of BRAFi+MEKi on anti-tumor immunity are unclear. Using patient tumor tissue before and after BRAFi+MEKi, two novel syngeneic murine models of BRAF ^V600E HGG, and patient-derived cell lines, we examined the effects of clinically relevant BRAFi+MEKi with dabrafenib and trametinib on tumor growth, cell states, and tumor-infiltrating T cells. We find that BRAFi+MEKi treatment: i) upregulated programmed cell death protein-1 (PD-1) signaling genes and PD-1 ligand (PD-L1) protein expression in murine BRAF ^V600E HGG by stimulating IFNγ and IL-27, ii) attenuated T cell activity by IL-23, IL-27 and IL-32 production, which can promote the expansion of regulatory T cells, and iii) induced glial differentiation linked to a therapy-resistant PD-L1+ compartment through Galectin-3 secretion by tumor cells. Murine BRAF ^V600E HGG shrinkage by BRAFi+MEKi is associated with the upregulation of interferon-gamma response genes, MHC class I/II expression, and antigen presentation and processing programs, indicative of increased anti-tumor immunity. Combined BRAFi+MEKi with therapeutic antibodies inhibiting the PD-1 and cytotoxic T-lymphocyte associated protein 4 (CTLA-4) immune checkpoints re-activate T cells and provide a survival benefit over single therapy in a T cell-dependent manner. The quadruple treatment overcame BRAFi+MEKi resistance by invigorating T cell-mediated anti-tumor immunity in murine BRAF ^V600E HGG. PD-L1 expression was elevated in human BRAF-mutant versus BRAF-wildtype glioblastoma clinical specimen, complementing experimental findings and suggesting translational relevance for patient care.</p>","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11482820/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82591681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiple Soliton Asymptotics in a Spin-1 Bose–Einstein Condensate","authors":"Zhong-Zhou Lan","doi":"10.1088/0256-307x/41/9/090501","DOIUrl":"https://doi.org/10.1088/0256-307x/41/9/090501","url":null,"abstract":"Spinor Bose–Einstein condensates (BECs) are formed when atoms in the multi-component BECs possess single hyperfine spin states but retain internal spin degrees of freedom. This study concentrates on a (1+1)-dimensional three-couple Gross–Pitaevskii system to depict the macroscopic spinor BEC waves within the mean-field approximation. Regarding the distribution of the atoms corresponding to the three vertical spin projections, a known binary Darboux transformation is utilized to derive the <italic toggle=\"yes\">N</italic> matter-wave soliton solutions and triple-pole matter-wave soliton solutions on the zero background, where <italic toggle=\"yes\">N</italic> is a positive integer. For those multiple matter-wave solitons, the asymptotic analysis is performed to obtain the algebraic expressions of the soliton components in the <italic toggle=\"yes\">N</italic> matter-wave solitons and triple-pole matter-wave solitons. The asymptotic results indicate that the matter-wave solitons in the spinor BECs possess the property of maintaining their energy content and coherence during the propagation and interactions. Particularly, in the <italic toggle=\"yes\">N</italic> matter-wave solitons, each soliton component contributes to the phase shifts of the other soliton components; and in the triple-pole matter-wave solitons, stable attractive forces exist between the different matter-wave soliton components. Those multiple matter-wave solitons are graphically illustrated through three-dimensional plots, density plot and contour plot, which are consistent with the asymptotic analysis results. The present analysis may provide the explanations for the complex natural mechanisms of the matter waves in the spinor BECs, and may have potential applications in designs of atom lasers, atom interferometry and coherent atom transport.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"1 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rydberg-Induced Topological Solitons in Three-Dimensional Rotation Spin–Orbit-Coupled Bose–Einstein Condensates","authors":"Yang Wang, Jinlong Cui, Hongkai Zhang, Yuan Zhao, Siliu Xu, Qin Zhou","doi":"10.1088/0256-307x/41/9/090302","DOIUrl":"https://doi.org/10.1088/0256-307x/41/9/090302","url":null,"abstract":"We present a novel approach for generating stable three-dimensional (3D) spatiotemporal solitons (SSs) within a rotating Bose–Einstein condensate, incorporating spin–orbit coupling (SOC), a weakly anharmonic potential and cold Rydberg atoms. This intricate system facilitates the emergence of quasi-stable 3D SSs with topological charges |<italic toggle=\"yes\">m</italic>| ≤ 3 in two spinor components, potentially exhibiting diverse spatial configurations. Our findings reveal that the Rydberg long-range interaction, spin–orbit coupling, and rotational angular frequency exert significant influence on the domains of existence and stability of these solitons. Notably, the Rydberg interaction contributes to a reduction in the norm of topological solitons, while the SOC plays a key role in stabilizing the SSs with finite topological charges. This research of SSs exhibits potential applications in precision measurement, quantum information processing, and other advanced technologies.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"57 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulating a Chern Insulator with C = ±2 on Synthetic Floquet Lattice","authors":"Ling-Xiao Lei, Wei-Chen Wang, Guang-Yao Huang, Shun Hu, Xi Cao, Xin-Fang Zhang, Ming-Tang Deng, Ping-Xing Chen","doi":"10.1088/0256-307x/41/9/090301","DOIUrl":"https://doi.org/10.1088/0256-307x/41/9/090301","url":null,"abstract":"The synthetic Floquet lattice, generated by multiple strong drives with mutually incommensurate frequencies, provides a powerful platform for quantum simulation of topological phenomena. In this study, we propose a 4-band tight-binding model of the Chern insulator with a Chern number <italic toggle=\"yes\">C</italic> = ±2 by coupling two layers of the half Bernevig–Hughes–Zhang lattice and subsequently mapping it onto the Floquet lattice to simulate its topological properties. To determine the Chern number of our Floquet-version model, we extend the energy pumping method proposed by Martin <italic toggle=\"yes\">et al.</italic> [2017 <italic toggle=\"yes\">Phys. Rev. X</italic> <bold>7</bold> 041008] and the topological oscillation method introduced by Boyers <italic toggle=\"yes\">et al.</italic> [2020 <italic toggle=\"yes\">Phys. Rev. Lett.</italic> <bold>125</bold> 160505], followed by numerical simulations for both methodologies. The simulation results demonstrate the successful extraction of the Chern number using either of these methods, providing an excellent prediction of the phase diagram that closely aligns with the theoretical one derived from the original bilayer half Bernevig–Hughes–Zhang model. Finally, we briefly discuss a potential experimental implementation for our model. Our work demonstrates significant potential for simulating complex topological matter using quantum computing platforms, thereby paving the way for constructing a more universal simulator for non-interacting topological quantum states and advancing our understanding of these intriguing phenomena.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"255 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pc(4457) Interpreted as a JP = 1/2+ State by D¯0Λc+(2595) – π0Pc(4312)","authors":"Jin-Zi Wu, Jin-Yi Pang, Jia-Jun Wu","doi":"10.1088/0256-307x/41/9/091201","DOIUrl":"https://doi.org/10.1088/0256-307x/41/9/091201","url":null,"abstract":"&lt;italic toggle=\"yes\"&gt;P&lt;sub&gt;c&lt;/sub&gt;&lt;/italic&gt;(4457) has been discovered over five years, but the parity of this particle remains undetermined. We propose a new interpretation for &lt;italic toggle=\"yes\"&gt;P&lt;sub&gt;c&lt;/sub&gt;&lt;/italic&gt;(4457), which is the state generated from the coupled-channel &lt;inline-formula&gt;\u0000&lt;tex-math&gt;\u0000&lt;?CDATA ${bar{D}}^{0}{varLambda }_{c}^{+}(2595)$?&gt;\u0000&lt;/tex-math&gt;&lt;mml:math overflow=\"scroll\"&gt;&lt;mml:mrow&gt;&lt;mml:msup&gt;&lt;mml:mover accent=\"true\"&gt;&lt;mml:mi&gt;D&lt;/mml:mi&gt;&lt;mml:mo stretchy=\"false\"&gt;¯&lt;/mml:mo&gt;&lt;/mml:mover&gt;&lt;mml:mn&gt;0&lt;/mml:mn&gt;&lt;/mml:msup&gt;&lt;mml:msubsup&gt;&lt;mml:mi&gt;Λ&lt;/mml:mi&gt;&lt;mml:mi&gt;c&lt;/mml:mi&gt;&lt;mml:mo&gt;+&lt;/mml:mo&gt;&lt;/mml:msubsup&gt;&lt;mml:mo stretchy=\"false\"&gt;(&lt;/mml:mo&gt;&lt;mml:mn&gt;2595&lt;/mml:mn&gt;&lt;mml:mo stretchy=\"false\"&gt;)&lt;/mml:mo&gt;&lt;/mml:mrow&gt;&lt;/mml:math&gt;\u0000&lt;inline-graphic xlink:href=\"cpl_41_9_091201_ieqn2.gif\"&gt;&lt;/inline-graphic&gt;&lt;/inline-formula&gt; and &lt;italic toggle=\"yes\"&gt;π&lt;/italic&gt;&lt;sup&gt;0&lt;/sup&gt;&lt;italic toggle=\"yes\"&gt;P&lt;sub&gt;c&lt;/sub&gt;&lt;/italic&gt;(4312) since they can exchange an almost on-shell &lt;inline-formula&gt;\u0000&lt;tex-math&gt;\u0000&lt;?CDATA ${varSigma }_{c}^{+}$?&gt;\u0000&lt;/tex-math&gt;&lt;mml:math overflow=\"scroll\"&gt;&lt;mml:mrow&gt;&lt;mml:msubsup&gt;&lt;mml:mi&gt;Σ&lt;/mml:mi&gt;&lt;mml:mi&gt;c&lt;/mml:mi&gt;&lt;mml:mo&gt;+&lt;/mml:mo&gt;&lt;/mml:msubsup&gt;&lt;/mml:mrow&gt;&lt;/mml:math&gt;\u0000&lt;inline-graphic xlink:href=\"cpl_41_9_091201_ieqn3.gif\"&gt;&lt;/inline-graphic&gt;&lt;/inline-formula&gt;. In this scenario, the parity of &lt;italic toggle=\"yes\"&gt;P&lt;sub&gt;c&lt;/sub&gt;&lt;/italic&gt;(4457) will be positive, which is different from the candidate of the bound state of &lt;inline-formula&gt;\u0000&lt;tex-math&gt;\u0000&lt;?CDATA ${bar{D}}^{* }{varSigma }_{c}$?&gt;\u0000&lt;/tex-math&gt;&lt;mml:math overflow=\"scroll\"&gt;&lt;mml:mrow&gt;&lt;mml:msup&gt;&lt;mml:mover accent=\"true\"&gt;&lt;mml:mi&gt;D&lt;/mml:mi&gt;&lt;mml:mo stretchy=\"false\"&gt;¯&lt;/mml:mo&gt;&lt;/mml:mover&gt;&lt;mml:mo&gt;*&lt;/mml:mo&gt;&lt;/mml:msup&gt;&lt;mml:msub&gt;&lt;mml:mi&gt;Σ&lt;/mml:mi&gt;&lt;mml:mi&gt;c&lt;/mml:mi&gt;&lt;/mml:msub&gt;&lt;/mml:mrow&gt;&lt;/mml:math&gt;\u0000&lt;inline-graphic xlink:href=\"cpl_41_9_091201_ieqn4.gif\"&gt;&lt;/inline-graphic&gt;&lt;/inline-formula&gt;. The main decay channel of &lt;italic toggle=\"yes\"&gt;P&lt;sub&gt;c&lt;/sub&gt;&lt;/italic&gt;(4457) in this model is &lt;italic toggle=\"yes\"&gt;P&lt;sub&gt;c&lt;/sub&gt;&lt;/italic&gt;(4312)&lt;italic toggle=\"yes\"&gt;π&lt;/italic&gt;. We propose three processes &lt;inline-formula&gt;\u0000&lt;tex-math&gt;\u0000&lt;?CDATA ${varLambda }_{b}^{0}to J/psi {K}_{s}p{pi }^{-}$?&gt;\u0000&lt;/tex-math&gt;&lt;mml:math overflow=\"scroll\"&gt;&lt;mml:mrow&gt;&lt;mml:msubsup&gt;&lt;mml:mi&gt;Λ&lt;/mml:mi&gt;&lt;mml:mi&gt;b&lt;/mml:mi&gt;&lt;mml:mn&gt;0&lt;/mml:mn&gt;&lt;/mml:msubsup&gt;&lt;mml:mo&gt;→&lt;/mml:mo&gt;&lt;mml:mi&gt;J&lt;/mml:mi&gt;&lt;mml:mo&gt;/&lt;/mml:mo&gt;&lt;mml:mi&gt;ψ&lt;/mml:mi&gt;&lt;mml:msub&gt;&lt;mml:mi&gt;K&lt;/mml:mi&gt;&lt;mml:mi&gt;s&lt;/mml:mi&gt;&lt;/mml:msub&gt;&lt;mml:mi&gt;p&lt;/mml:mi&gt;&lt;mml:msup&gt;&lt;mml:mi&gt;π&lt;/mml:mi&gt;&lt;mml:mo&gt;−&lt;/mml:mo&gt;&lt;/mml:msup&gt;&lt;/mml:mrow&gt;&lt;/mml:math&gt;\u0000&lt;inline-graphic xlink:href=\"cpl_41_9_091201_ieqn5.gif\"&gt;&lt;/inline-graphic&gt;&lt;/inline-formula&gt;, &lt;inline-formula&gt;\u0000&lt;tex-math&gt;\u0000&lt;?CDATA ${varLambda }_{b}^{0}to J/psi {K}^{-}p{pi }^{0}$?&gt;\u0000&lt;/tex-math&gt;&lt;mml:math overflow=\"scroll\"&gt;&lt;mml:mrow&gt;&lt;mml:msubsup&gt;&lt;mml:mi&gt;Λ&lt;/mml:mi&gt;&lt;mml:mi&gt;b&lt;/mml:mi&gt;&lt;mml:mn&gt;0&lt;/mml:mn&gt;&lt;/mml:msubsup&gt;&lt;mml:mo&gt;→&lt;/mml:mo&gt;&lt;mml:mi&gt;J&lt;/mml:mi&gt;&lt;mml:mo&gt;/&lt;/mml:mo&gt;&lt;mml:mi&gt;ψ&lt;/mml:mi&gt;&lt;mml:msup&gt;&lt;mml:mi&gt;K&lt;/mml:mi&gt;&lt;mml:mo&gt;−&lt;/mml:mo&gt;&lt;/mml:msup&gt;&lt;mml:mi&gt;p&lt;/mml:mi&gt;&lt;mml:msup&gt;&lt;mml:mi&gt;π&lt;/mml:mi&gt;&lt;mml:mn&gt;0&lt;/mml:mn&gt;&lt;/mml:m","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"45 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Excitonic Instability in Ta2Pd3Te5 Monolayer","authors":"Jingyu Yao, Haohao Sheng, Ruihan Zhang, Rongtian Pang, Jin-Jian Zhou, Quansheng Wu, Hongming Weng, Xi Dai, Zhong Fang, Zhijun Wang","doi":"10.1088/0256-307x/41/9/097101","DOIUrl":"https://doi.org/10.1088/0256-307x/41/9/097101","url":null,"abstract":"By systematic theoretical calculations, we reveal an excitonic insulator (EI) in the Ta₂Pd₃Te₅ monolayer. The bulk Ta₂Pd₃Te₅ is a van der Waals (vdW) layered compound, whereas the vdW layer can be obtained through exfoliation or molecular-beam epitaxy. First-principles calculations show that the monolayer is a nearly zero-gap semiconductor with the modified Becke–Johnson functional. Due to the same symmetry of the band-edge states, the two-dimensional polarization <italic toggle=\"yes\">α</italic>_2D would be finite as the band gap goes to zero, allowing for an EI state in the compound. Using the first-principles many-body perturbation theory, the <italic toggle=\"yes\">GW</italic> plus Bethe–Salpeter equation calculation reveals that the exciton binding energy is larger than the single-particle band gap, indicating the excitonic instability. The computed phonon spectrum suggests that the monolayer is dynamically stable without lattice distortion. Our findings suggest that the Ta₂Pd₃Te₅ monolayer is an excitonic insulator without structural distortion.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"24 2 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mode Multiplication of Cylindrical Vector Beam Using Raytracing Control","authors":"Jing Wang, 晶 王, Qingji Zeng, 庆计 曾, Haisheng Wu, 海生 吴, Chuangxin Xie, 创鑫 谢, Huapeng Ye, 华朋 叶, Ze Dong, 泽 董, Dianyuan Fan, 滇元 范, Shuqing Chen and 书青 陈","doi":"10.1088/0256-307x/41/9/094202","DOIUrl":"https://doi.org/10.1088/0256-307x/41/9/094202","url":null,"abstract":"Cylindrical vector beams (CVBs) hold significant promise in mode division multiplexing communication owing to their inherent vector mode orthogonality. However, existing studies for facilitating CVB channel processing are confined to mode shift conversions due to their reliance on spin-dependent helical modulations, overlooking the pursuit of mode multiplication conversion. This challenge lies in the multiplicative operation upon inhomogeneous vector mode manipulation, which is expected to advance versatile CVB channel switching and routing. Here, we tackle this gap by introducing a raytracing control strategy that conformally maps the light rays of CVB from the whole annulus distribution to an annular sector counterpart. Incorporated with the multifold conformal annulus-sector mappings and polarization-insensitive phase modulations, this approach facilitates the parallel transformation of input CVB into multiple complementary components, enabling the mode multiplication conversion with protected vector structure. Serving as a demonstration, we experimentally implemented the multiplicative operation of four CVB modes with the multiplier factors of N = +2 and N = –3, achieving the converted mode purities over 94.24% and 88.37%. Subsequently, 200 Gbit/s quadrature phase shift keying signals were successfully transmitted upon multiplicative switching of four CVB channels, with the bit-error-rate approaching 1 × 10−6. These results underscore our strategy’s efficacy in CVB mode multiplication, which may open promising prospects for its advanced applications.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"31 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142263616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electronic and Thermoelectric Properties in SnS-Nanoribbon-Based Heterojunctions","authors":"Kai-Bo Zhang, 凯波 张, Shi-Hua Tan, 仕华 谭, Xiao-Fang Peng, 小芳 彭, Meng-Qiu Long and 孟秋 龙","doi":"10.1088/0256-307x/41/9/097301","DOIUrl":"https://doi.org/10.1088/0256-307x/41/9/097301","url":null,"abstract":"As an earth-abundant and environmentally friendly material, tin sulfide (SnS) is not only a high-performance photovoltaic material, but also a new promising thermoelectric material. Despite extensive research on the thermoelectric properties of this material in recent years, the room-temperature thermoelectric figure of merit (ZT) of SnS has not been broke through 2 [2022 Sci. China Mater.65 1143]. In this work, based on a combination of density functional theory and non-equilibrium Green’s function method, the electronic and thermoelectric properties in SnS-nanoribbon-based heterojunctions are studied. The results show that although SnS nanoribbons (SNSNRs) with zigzag edges (ZSNSNRs) and armchair edges (ASNSNRs) both have semiconductor properties, the bandgaps of ASNSNRs are much wider than those of ZSNSNRs, which induces much wider conductance gaps of N-ASNSNR (N is the number of tin-sulfide lines across the ribbon width)). In the positive energy region, the ZT peaks of L-SNS-Au are much larger than those of L-SNS-GNR (L represents the number of longitudinal repeating units of SNSNR in the scattering region). While in the positive energy region, the ZT peaks of L-SNS-GNR are larger than those of L-SNS-Au. Further calculations reveal that the figure of merit will be over 3.7 in L-SNS-Au and 2.2 in L-SNS-GNR at room temperature, and over 4 in L-SNS-Au and 2.6 in L-SNS-GNR at 500 K.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"32 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microscopic Magnetism of Nickel-Based Infinite-Layer Superconducting Parent Compounds RNiO2 (R = La, Nd): A μSR Study","authors":"Qiong Wu, 琼 吴, Ying Fu, 盈 付, Le Wang, 乐 王, Xuefeng Zhou, 雪峰 周, Shanmin Wang, 善民 王, Zihao Zhu, 子浩 朱, Kaiwen Chen, 锴文 陈, Chengyu Jiang, 程予 姜, Toni Shiroka, Adrian D. Hillier, Jia-Wei Mei, 佳伟 梅, Lei Shu and 蕾 殳","doi":"10.1088/0256-307x/41/9/097502","DOIUrl":"https://doi.org/10.1088/0256-307x/41/9/097502","url":null,"abstract":"By using muon spin relaxation (μSR) measurements, we perform a comparative study of the microscopic magnetism in the parent compounds of infinite-layer nickelate superconductors RNiO2 (R = La, Nd). In either compound, the zero-field μSR spectra down to the lowest measured temperature reveal no long-range magnetic order. In LaNiO2, short-range spin correlations appear below T = 150 K, and spins fully freeze below T ∼ 10 K. NdNiO2 exhibits a more complex spin dynamics driven by the Nd 4f and Ni 3d electron spin fluctuations. Further, it shows features suggesting the proximity to a spin-glass state occurring below T = 5 K. In both compounds, the spin behavior with temperature is further confirmed by longitudinal-field μSR measurements. These results provide new insight into the magnetism of the parent compounds of the superconducting nickelates, crucial to understanding the microscopic origin of their superconductivity.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"6 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chiral Pair Density Waves with Residual Fermi Arcs in RbV3Sb5","authors":"Xiao-Yu Yan, Hanbin Deng, Tianyu Yang, Guowei Liu, Wei Song, Hu Miao, Zhijun Tu, Hechang Lei, Shuo Wang, Ben-Chuan Lin, Hailang Qin, Jia-Xin Yin","doi":"10.1088/0256-307x/41/9/097401","DOIUrl":"https://doi.org/10.1088/0256-307x/41/9/097401","url":null,"abstract":"The chiral 2 × 2 charge order has been reported and confirmed in the kagome superconductor RbV₃Sb₅, while its interplay with superconductivity remains elusive owing to its lowest superconducting transition temperature <italic toggle=\"yes\">T</italic>_C of about 0.85 K in the AV₃Sb₅ family (A = K, Rb, Cs) that severely challenges electronic spectroscopic probes. Here, utilizing dilution-refrigerator-based scanning tunneling microscopy down to 30 mK, we observe chiral 2 × 2 pair density waves with residual Fermi arcs in RbV₃Sb₅. We find a superconducting gap of 150 μeV with substantial residual in-gap states. The spatial distribution of this gap exhibits chiral 2 × 2 modulations, signaling a chiral pair density wave (PDW). Our quasi-particle interference imaging of the zero-energy residual states further reveals arc-like patterns. We discuss the relation of the gap modulations with the residual Fermi arcs under the space-momentum correspondence between PDW and Bogoliubov Fermi states.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"175 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}