Journal of Physics: Condensed Matter最新文献

筛选
英文 中文
Electromagnetically tunable spin-valley-polarized current via anomalous Nernst effect in monolayer of jacutingaite. 通过单层碧玉石中的反常奈恩斯特效应实现电磁可调自旋谷极化电流
IF 2.3 4区 物理与天体物理
Journal of Physics: Condensed Matter Pub Date : 2024-11-21 DOI: 10.1088/1361-648X/ad9070
Yaser Hajati, Mohammad Alipourzadeh, Imam Makhfudz, Jamal Berakdar
{"title":"Electromagnetically tunable spin-valley-polarized current via anomalous Nernst effect in monolayer of jacutingaite.","authors":"Yaser Hajati, Mohammad Alipourzadeh, Imam Makhfudz, Jamal Berakdar","doi":"10.1088/1361-648X/ad9070","DOIUrl":"10.1088/1361-648X/ad9070","url":null,"abstract":"<p><p>Monolayer jacutingaite (Pt<sub>2</sub>HgSe<sub>3</sub>) exhibits remarkable properties, including significant spin-orbit coupling (SOC) and a tunable band gap, attributed to its buckled honeycomb geometry and the presence of heavy atoms. In this study, we explore the spin- and valley-dependent anomalous Nernst effect (ANE) in jacutingaite under the influence of a vertical electric field, off-resonance circularly polarized light (OCPL), and an antiferromagnetic exchange field. Our findings, within the low-energy approximation, reveal the emergence of a perfectly spin-polarized ANE with the application of appropriate OCPL and a perfectly valley-polarized ANE under an antiferromagnetic exchange field. Leveraging the robust SOC inherent in monolayer jacutingaite, our study highlights the potential to attain perfectly spin-valley-polarized Nernst currents across a wide range of Fermi energy levels by combining these fields in pairs with a suitable strength. The findings can be used for the development of spin-valley-based optoelectronic devices.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Topological Hall effect instigated in kagome Mn3-xSn due to Mn-deficit induced noncoplanar spin structure. 因缺锰诱导非共面自旋结构而在 Kagome Mn$_{3-x}$Sn 中引发的拓扑霍尔效应
IF 2.3 4区 物理与天体物理
Journal of Physics: Condensed Matter Pub Date : 2024-11-20 DOI: 10.1088/1361-648X/ad9072
Achintya Low, Susanta Ghosh, Setti Thirupathaiah
{"title":"Topological Hall effect instigated in kagome Mn<sub>3-x</sub>Sn due to Mn-deficit induced noncoplanar spin structure.","authors":"Achintya Low, Susanta Ghosh, Setti Thirupathaiah","doi":"10.1088/1361-648X/ad9072","DOIUrl":"10.1088/1361-648X/ad9072","url":null,"abstract":"<p><p>Magnetic topological semimetals are manifestations of the interplay between electronic and magnetic phases of matter, leading to peculiar characteristics such as the anomalous Hall effect (AHE) and the topological Hall effect (THE). Mn<sub>3</sub>Sn is a time-reversal symmetry-broken magnetic Weyl semimetal showing topological characteristics within the Kagome lattice network. This study reveals a large THE in Mn<sub>2.8</sub>Sn (6% Mn deficit Mn<sub>3</sub>Sn) at room temperature in the<i>xy</i>-plane, despite being an antiferromagnet. We argue that the magnetocrystalline anisotropy induced noncoplanar spin structure is responsible for the observed THE in these systems. Further, the topological properties of these systems are highly anisotropic, as we observe a large AHE in the<i>zx</i>-plane. We find that Fe doping at the Mn site, Mn3-xFe<sub><i>x</i></sub>Sn (<i>x</i>= 0.2, 0.25, & 0.35), tunes the topological properties of these systems. These findings promise the realization of potential topotronic applications at room temperature.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142603712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Evolution of structural, magnetic and transport properties of 3d-5dbased double perovskites Nd2-xSrxCoIrO6. 基于 3d-5db 的双包晶石 Nd2-xSrxCoIrO6 的结构、磁性和传输特性的演变。
IF 2.3 4区 物理与天体物理
Journal of Physics: Condensed Matter Pub Date : 2024-11-20 DOI: 10.1088/1361-648X/ad8d9b
Raktim Datta, Suman Mondal, Suchanda Mondal, Suman Kalyan Pradhan, Subham Majumdar, Subodh Kumar De
{"title":"Evolution of structural, magnetic and transport properties of 3<i>d</i>-5<i>d</i>based double perovskites Nd<sub>2-<i>x</i></sub>Sr<sub><i>x</i></sub>CoIrO<sub>6</sub>.","authors":"Raktim Datta, Suman Mondal, Suchanda Mondal, Suman Kalyan Pradhan, Subham Majumdar, Subodh Kumar De","doi":"10.1088/1361-648X/ad8d9b","DOIUrl":"https://doi.org/10.1088/1361-648X/ad8d9b","url":null,"abstract":"<p><p>The evolution of the structural, magnetic and transport properties of the intermediate compounds Nd2-xSr<sub><i>x</i></sub>CoIrO<sub>6</sub>with<i>x</i>= 0.2, 0.4, 0.6, 1 and 1.5 have been studied to establish important roles of sizes and oxidation states of cations on various phases. The replacement of Nd<sup>3+</sup>by Sr<sup>2+</sup>primarily influences the oxidation states of Co (Co<sup>2+</sup>→Co<sup>3+</sup>) and Ir (Ir<sup>4+</sup>→Ir<sup>5+</sup>) ions to maintain the charge neutrality in the entire system. The Sr dopants give rise to an increasing Co/Ir antisite disorder (ASD) to accommodate the variation of charge state and ionic radius of Co and Ir. The nature of magnetic interaction induced by Sr changes from being a ferrimagnetic (FIM) to a more dominant antiferromagnetic. The suppression of the second magnetic transition below 30 K in samples for<i>x</i>>0.2 is entirely due to dilution of the Nd-Nd magnetic interaction. The combined effects of ASD and mixed oxidation state of Co and Ir ions generate various types of magnetic exchange pathways and create competitive magnetic interactions to stabilize a particular magnetic ground state. In the middle compound NdSrCoIrO<sub>6</sub>, a Griffith like phase in the temperature region 65-150 K and exchange bias field of 658 Oe at 2.3 K under a cooling field of 50 kOe has been observed. The compounds show an insulating kind of behaviour, and with hole doping the value of room temperature resistivity drastically decreases. The nature of conduction is found to follow three dimensional Mott's variable range hopping process.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":"37 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142676141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Superconducting energy gap structure of CsV3Sb5from magnetic penetration depth measurements. 从磁穿透深度测量看 CsV3Sb5 的超导能隙结构
IF 2.3 4区 物理与天体物理
Journal of Physics: Condensed Matter Pub Date : 2024-11-20 DOI: 10.1088/1361-648X/ad8d2b
Morgan J Grant, Yi Liu, Guang-Han Cao, Joseph A Wilcox, Yanfeng Guo, Xiaofeng Xu, Antony Carrington
{"title":"Superconducting energy gap structure of CsV<sub>3</sub>Sb<sub>5</sub>from magnetic penetration depth measurements.","authors":"Morgan J Grant, Yi Liu, Guang-Han Cao, Joseph A Wilcox, Yanfeng Guo, Xiaofeng Xu, Antony Carrington","doi":"10.1088/1361-648X/ad8d2b","DOIUrl":"10.1088/1361-648X/ad8d2b","url":null,"abstract":"<p><p>Experimental determination of the structure of the superconducting order parameter in the kagome lattice compound CsV<sub>3</sub>Sb<sub>5</sub>is an essential step towards understanding the nature of the superconducting pairing in this material. Here we report measurements of the temperature dependence of the in-plane magnetic penetration depth,λ(T), in crystals of CsV<sub>3</sub>Sb<sub>5</sub>down to∼60mK. We find thatλ(T)is consistent with a fully-gapped state but with significant gap anisotropy. The magnitude of the gap minima are in the range∼0.2-0.3 Tcfor the measured samples, markedly smaller than previous estimates. We discuss different forms of potential anisotropy and how these can be linked to the V and Sb Fermi surface sheets. We highlight a significant discrepancy between the calculated and measured values ofλ(T=0)which we suggest is caused by spatially suppressed superconductivity.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142546086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Valley manipulation by external fields in two-dimensional materials and their hybrid systems. 二维材料及其混合系统中的外场谷操纵。
IF 2.3 4区 物理与天体物理
Journal of Physics: Condensed Matter Pub Date : 2024-11-20 DOI: 10.1088/1361-648X/ad8f81
Ya-Ping Shao, Yun-Qin Li, Jun-Ding Zheng, Yi-Fan Tan, Zhao Guan, Ni Zhong, Fang-Yu Yue, Wen-Yi Tong, Chun-Gang Duan
{"title":"Valley manipulation by external fields in two-dimensional materials and their hybrid systems.","authors":"Ya-Ping Shao, Yun-Qin Li, Jun-Ding Zheng, Yi-Fan Tan, Zhao Guan, Ni Zhong, Fang-Yu Yue, Wen-Yi Tong, Chun-Gang Duan","doi":"10.1088/1361-648X/ad8f81","DOIUrl":"10.1088/1361-648X/ad8f81","url":null,"abstract":"<p><p>Investigating two-dimensional (2D) valleytronic materials opens a new chapter in physics and facilitates the emergence of pioneering technologies. Nevertheless, this nascent field faces substantial challenges, primarily attributed to the inherent issue of valley energy degeneracy and the manipulation of valley properties. To break these constraints, the application of external fields has become pivotal for both generating and manipulating the valley properties of 2D systems. This paper takes a close look at the latest progress in modulating the valley properties of 2D valleytronic materials using external fields, covering a wide array of configurations from monolayers and bilayers to intricate heterostructures. We hope that this overview will inspire more exciting discoveries and significantly propel the evolution of valleytronics within the realm of 2D material research.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142590796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Emerging new phases in correlated Mott insulator Ca2RuO4. 相关莫特绝缘体 Ca2RuO4 中新出现的新相。
IF 2.3 4区 物理与天体物理
Journal of Physics: Condensed Matter Pub Date : 2024-11-19 DOI: 10.1088/1361-648X/ad906d
Giuseppe Cuono, Filomena Forte, Alfonso Romano, Canio Noce
{"title":"Emerging new phases in correlated Mott insulator Ca<sub>2</sub>RuO<sub>4</sub>.","authors":"Giuseppe Cuono, Filomena Forte, Alfonso Romano, Canio Noce","doi":"10.1088/1361-648X/ad906d","DOIUrl":"10.1088/1361-648X/ad906d","url":null,"abstract":"<p><p>The Mott insulator Ca<sub>2</sub>RuO<sub>4</sub>is a paradigmatic example among transition metal oxides, where the interplay of charge, spin, orbital, and lattice degrees of freedom leads to competing quantum phases. In this paper, we focus on and review some key aspects, from the underlying physical framework and its basic properties, to recent theoretical efforts that aim to trigger unconventional quantum ground states, using several external parameters and stimuli. Using first-principle calculations, we demonstrate that Ca<sub>2</sub>RuO<sub>4</sub>shows a spin splitting in the reciprocal space, and identify it as an altermagnetic candidate material. The non relativistic spin-splitting has an orbital selective nature, dictated by the local crystallographic symmetry. Next, we consider two routes that may trigger exotic quantum states. The first one corresponds to transition metal substitution of the 4<i>d</i><sup>4</sup>Ru with isovalent 3<i>d</i><sup>3</sup>ions. This substitutional doping may alter the spin-orbital correlations favoring the emergence of negative thermal expansion. The second route explores fledgling states arising in a non-equilibrium steady state under the influence of an applied electric field. We show that the electric field can directly affect the orbital density, eventually leading to strong orbital fluctuations and the suppression of orbital imbalance, which may, in turn, reduce antiferromagnetism. These aspects suggest possible practical applications, as its unique properties may open up possibilities for augmenting existing technologies, surpassing the limitations of conventional materials.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Pressure induced semiconductor-like to metal transition and linear magnetoresistance in Cr2S2.88single crystal. Cr2S2.88 单晶中由压力诱导的类半导体到金属的转变和线性磁阻。
IF 2.3 4区 物理与天体物理
Journal of Physics: Condensed Matter Pub Date : 2024-11-19 DOI: 10.1088/1361-648X/ad906f
Xiaodong Sun, Xuebo Zhou, Hao Sun, Feng Wu, Yuanzhe Li, Wanli He, Pengda Ye, Xiang Li, Jianlin Luo, Meiling Jin, Wei Wu
{"title":"Pressure induced semiconductor-like to metal transition and linear magnetoresistance in Cr<sub>2</sub>S<sub>2.88</sub>single crystal.","authors":"Xiaodong Sun, Xuebo Zhou, Hao Sun, Feng Wu, Yuanzhe Li, Wanli He, Pengda Ye, Xiang Li, Jianlin Luo, Meiling Jin, Wei Wu","doi":"10.1088/1361-648X/ad906f","DOIUrl":"10.1088/1361-648X/ad906f","url":null,"abstract":"<p><p>The transition metal chalcogenide Cr<sub>2</sub>S<sub>3-<i>x</i></sub>has unique properties, such as a lower antiferromagnetic transition temperature, semiconducting behavior, and thermoelectric properties. We focus on the effects of high pressure on the properties of electrical transport and structure in the single crystal Cr<sub>2</sub>S<sub>2.88</sub>. It is observed that the resistance drops abruptly by approximately two orders of magnitude and the temperature derivative of the resistance changes from negative to positive after 15.7 GPa. The Cr<sub>2</sub>S<sub>2.88</sub>crystal has undergone transitions from a semiconductor-like phase to a metal I phase and then to another metal II phase. Simultaneously, a structural phase transition after 16.1 GPa is confirmed by synchrotron angle dispersive x-ray diffraction. After the structural phase transition, the negative magnetoresistance becomes positive with increasing pressure and shows a linear relationship in the metal II phase. Electron-type carriers dominate in the semiconductor-like phase, but hole-type carriers dominate after the structural phase transition. Our work provides an example of the effective modulation of semiconductor-like properties by pressure, which is meaningful for the innovation and development of semiconductor technology.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142603710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Impact of quantum information encoding and metallic leads on dynamical multipartite correlation formation in semiconductor quantum dot arrays. 量子信息编码和金属引线对半导体量子点阵列中动态多方相关性形成的影响。
IF 2.3 4区 物理与天体物理
Journal of Physics: Condensed Matter Pub Date : 2024-11-19 DOI: 10.1088/1361-648X/ad906e
Nikolaos Petropoulos, Elena Blokhina
{"title":"Impact of quantum information encoding and metallic leads on dynamical multipartite correlation formation in semiconductor quantum dot arrays.","authors":"Nikolaos Petropoulos, Elena Blokhina","doi":"10.1088/1361-648X/ad906e","DOIUrl":"10.1088/1361-648X/ad906e","url":null,"abstract":"<p><p>This study investigates quantum information scrambling (QIS) in a semiconductor quantum dot array. Starting with the 1D Transverse Field Ising model, we expand to more relevant quasi-2D frameworks such as the Heisenberg chain, super-extended Fermi-Hubbard (FH) and hardcore FH models. Assessing their relevance to semiconductor spin-qubit quantum computers, simulations of multipartite correlation formation examine qubit encoding strategies' fidelity, stability, and robustness, revealing trade-offs among these aspects. Furthermore, we investigate the weakly coupled metallic injector/detector (I/D) leads' significant impact on QIS behavior by employing multi-lead<b><i>N</i></b>-single orbital impurities weakly coupled Anderson models and studying the unitary evolution of the system. We observe sign flips in spatiotemporal tripartite mutual information which result in significant effects on dynamical correlation structures and their formation. Exploring carrier number effects, we identify optimal regions for QIS enhancement. Our findings emphasize the necessity of proper qubit encoding and I/D leads' influence on quantum information dynamics.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142603300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Monolayer M2X2O as potential 2D altermagnets and half-metals: a first principles study. 作为潜在二维变磁体和半金属的单层 M2X2O:第一原理研究。
IF 2.3 4区 物理与天体物理
Journal of Physics: Condensed Matter Pub Date : 2024-11-19 DOI: 10.1088/1361-648X/ad8e9f
Kaixin Zou, Yuxin Yang, Baojuan Xin, Wentao Wu, Yahui Cheng, Hong Dong, Hui Liu, Feng Luo, Feng Lu, Wei-Hua Wang
{"title":"Monolayer M<sub>2</sub>X<sub>2</sub>O as potential 2D altermagnets and half-metals: a first principles study.","authors":"Kaixin Zou, Yuxin Yang, Baojuan Xin, Wentao Wu, Yahui Cheng, Hong Dong, Hui Liu, Feng Luo, Feng Lu, Wei-Hua Wang","doi":"10.1088/1361-648X/ad8e9f","DOIUrl":"10.1088/1361-648X/ad8e9f","url":null,"abstract":"<p><p>Realizing novel two-dimensional (2D) magnetic states would accelerate the development of advanced spintronic devices and the understandings of 2D magnetic physics. In this paper, we have examined the magnetic and electronic properties of 20 dynamically stable and exfoliable M<sub>2</sub>X<sub>2</sub>O (M = Ti-Ni; X = S-Te; excluding Co<sub>2</sub>Te<sub>2</sub>O). It has been unveiled that [X<sub>4</sub>O<sub>2</sub>]-<i>D</i><sub>2<i>h</i></sub>and [M<sub>4</sub>]-<i>D</i><sub>4<i>h</i></sub>crystal fields govern the M-3<i>d</i>orbital splittings in M<sub>2</sub>X<sub>2</sub>O. The splittings further lead to the antiferromagnetic (AFM) orderings in Ti<sub>2</sub>S<sub>2</sub>O/Fe<sub>2</sub>S<sub>2</sub>O/Fe<sub>2</sub>Se<sub>2</sub>O/M<sub>2</sub>X<sub>2</sub>O (M = V, Cr, Mn and Ni; X = S-Se) as well as the ferromagnetic orderings in Ti<sub>2</sub>Se<sub>2</sub>O/Ti<sub>2</sub>Te<sub>2</sub>O/Fe<sub>2</sub>Te<sub>2</sub>O/Co<sub>2</sub>S<sub>2</sub>O/Co<sub>2</sub>Se<sub>2</sub>O through kinetic and superexchange mechanisms. Notably, all the AFM M<sub>2</sub>X<sub>2</sub>O are 2D altermagnets, and Ti<sub>2</sub>Se<sub>2</sub>O/Ti<sub>2</sub>Te<sub>2</sub>O/Co<sub>2</sub>S<sub>2</sub>O/Co<sub>2</sub>Se<sub>2</sub>O are 2D half-metals. In particular, the anisotropic<i>d-d/p</i>hoppings lead to the tunable altermagnetic splitting in Ti<sub>2</sub>S<sub>2</sub>O/Cr<sub>2</sub>Te<sub>2</sub>O, while the parity of V-3<i>d<sub>yz</sub></i>orbital contributes to the symmetry-protected altermagnetic splitting within V<sub>2</sub>X<sub>2</sub>O. These altermagnetic and half-metallic monolayer M<sub>2</sub>X<sub>2</sub>O provide promising candidates applied in low-dimensional spintronic devices. In addition, the potential 2D altermagnetic Weyl semimetal of Fe<sub>2</sub>S<sub>2</sub>O/Fe<sub>2</sub>Se<sub>2</sub>O, nodal-loop half-metal of Ti<sub>2</sub>Se<sub>2</sub>O and half-semi metal of Ti<sub>2</sub>Te<sub>2</sub>O facilitate to uncover novel low-dimensional topological physics. These theoretical results would expand the platform in particular for 2D altermagnets and nontrivial systems.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142576304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Chirality reversal quantum phase transition in flat-band topological insulators. 平带拓扑绝缘体中的手性反转量子相变。
IF 4.6 4区 物理与天体物理
Journal of Physics: Condensed Matter Pub Date : 2024-11-18 DOI: 10.1088/1361-648X/ad8f83
V I Litvinov
{"title":"Chirality reversal quantum phase transition in flat-band topological insulators.","authors":"V I Litvinov","doi":"10.1088/1361-648X/ad8f83","DOIUrl":"10.1088/1361-648X/ad8f83","url":null,"abstract":"<p><p>Quantum anomalous Hall effect generates dissipationless chiral conductive edge states in materials with large spin-orbit coupling and strong, intrinsic, or proximity magnetisation. The topological indexes of the energy bands are robust to smooth variations in the relevant parameters. Topological quantum phase transitions between states with different Chern numbers require the closing of the bulk bandgap:|C|=1→C=1/2corresponds to the transition from a topological insulator to a gapless state ink=0- quantum anomalous semimetal. Within the Bernevig-Hughes-Zhang (BHZ) model of 2D topological quantum well, this study identifies another type of topological phase transition induced by a magnetic field. The transitionC=±1→C=∓1occurs when the monotonic Zeeman field reaches the threshold value and thus triggers the reversal of edge modes chirality. The calculated threshold depends on the width of the conduction and valence bands and is more experimentally achievable the flatter the bands. The effect of the topological phase transition|ΔC|=2can be observed experimentally as a jump in magnetoresistance.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142590696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信