Journal of Physics: Condensed Matter最新文献_第4页

Strain-tunable electronic properties of 2D-B9: a borophene allotrope with mechanical flexibility.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-03-27 DOI: 10.1088/1361-648X/adbecd

Qian Gao, Zhenpeng Hu, Lan Chen

{"title":"Strain-tunable electronic properties of 2D-B9: a borophene allotrope with mechanical flexibility.","authors":"Qian Gao, Zhenpeng Hu, Lan Chen","doi":"10.1088/1361-648X/adbecd","DOIUrl":"10.1088/1361-648X/adbecd","url":null,"abstract":"In this work, we explore the structural, mechanical, and electronic properties of 2D-B9, a borophene allotrope with a unique bonding structure and promising potential for strain engineering. Through first-principles calculations, we investigate the material's stability, revealing a robust phonon spectrum and favorable mechanical flexibility, including isotropic behavior and a moderate Young's modulus. The electronic structure of 2D-B9 features key characteristics such as a van Hove singularity (vHS) and a Dirac point, which can be dynamically tuned via strain. Under tensile strain, the vHS shifts downward, while compressive strain causes it to rise, with the vHS aligning with the Fermi level at 10% compression. This strain-induced tuning of the electronic structure is further confirmed by examining changes in Fermi velocity, which is found to be similar to that of graphene at 9 × 105m s-1, indicating high electronic mobility. These results highlight the potential of 2D-B9 for applications in flexible electronics, quantum devices, and other technologies where strain-sensitive electronic properties are essential.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143597242","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

Strain tuning of the nonlinear anomalous Hall effect in MoS2 monolayer.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-03-27 DOI: 10.1088/1361-648X/adc64a

Yuebei Xiong, Zhirui Gong, Hao Jin

引用次数: 0

Pressure Dependence of Ultrafast Carrier Dynamics in Excitonic Insulator Ta2NiSe5.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-03-27 DOI: 10.1088/1361-648X/adc64b

Vikas Arora, D Victor S Muthu, Arijit Sinha, Luminita Harnagea, Umesh V Waghmare, A K Sood

{"title":"Pressure Dependence of Ultrafast Carrier Dynamics in Excitonic Insulator Ta2NiSe5.","authors":"Vikas Arora, D Victor S Muthu, Arijit Sinha, Luminita Harnagea, Umesh V Waghmare, A K Sood","doi":"10.1088/1361-648X/adc64b","DOIUrl":"https://doi.org/10.1088/1361-648X/adc64b","url":null,"abstract":"An excitonic insulator (EI) phase is a consequence of collective many-body effects where an optical band gap is formed by the condensation of electron-hole pairs or excitons. We report pressure-dependent optical pump-optical probe spectroscopy of EI Ta2NiSe5 up to 5 GPa. The differential reflectivity as a function of delay time between the pump and probe pulses shows tworelaxation processes with their time constants and amplitudes revealing changes at PC1 ∼ 1 GPa (transition from EI phase to semiconductor) and PC2 ∼ 3 GPa (from semiconductor to semimetallic phase). The pressure dependence of the fast relaxation time and corresponding amplitude in the EI phase are captured by the Rothwarf-Taylor model, bringing out the decrease of the bandgap under pressure, with a pressure coefficient of 65 meV/GPa, closely agreeing with our first principle calculations. The decrease of the slow relaxation time in the EI phase with pressure is due to enhanced electron-phonon coupling as confirmed by our calculations. The fluence dependence of the relaxation parameters at different pressures corroborates the semi-metallic nature above PC2 . Our experiments combined with first principle calculations thus provide additional insights into different high-pressure phases of Ta2NiSe5.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730530","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

A review of progress in theoretical modeling of polarization dynamics in ferroelectric materials.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-03-27 DOI: 10.1088/1361-648X/adbecc

Haohua Wen, Jianyi Liu, Jinhong Li, Bowen Li, Weijin Chen, Yue Zheng

{"title":"A review of progress in theoretical modeling of polarization dynamics in ferroelectric materials.","authors":"Haohua Wen, Jianyi Liu, Jinhong Li, Bowen Li, Weijin Chen, Yue Zheng","doi":"10.1088/1361-648X/adbecc","DOIUrl":"10.1088/1361-648X/adbecc","url":null,"abstract":"Ferroelectric materials are considered candidates for functional device application since their discovery in 1920. The functionality is realized by polarization evolution itself or the resulting effects. Studies on ferroelectrics have been going on over a century with a rough journey, because they have the excellent physical properties and also the fatal disadvantages for the device applications, where polarization microstructure and the dynamics are always the core issues. The demand for miniaturization, low energy consumption, and intelligence of devices leads to the advancement of the studies on the polarization microstructure and dynamics towards microscopic and ultrafast scales, as well as precise manipulation. This review mainly focuses on the inherent logic of the development of the theoretical modeling on the polarization dynamics. We would like to discuss the historical background of the development of theoretical models and their limitations, following the historical trajectory how to understand the multiscale nature of polarization microstructure and dynamics and the developing demand of functional devices applications, based on which the prospect and future development direction of theoretical modeling are proposed.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143597154","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

Multiferroicity and phase diagram of ferro-rotational magnet RbFe(SO₄)₂.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-03-27 DOI: 10.1088/1361-648X/adc064

Junjie Yang, Dimuthu Obeysekera, William Ratcliff, Lu Li, Sabine N Neal, Janice L Musfeldt, Shinichiro Yano

引用次数: 0

Magnetic disorder induced Hall conductance fluctuation in the semi-magnetic topological insulator thin film.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-03-27 DOI: 10.1088/1361-648X/adc0d9

Xiao-Xia Yi, Rui Chen, Bin Zhou

引用次数: 0

Hatsugai-Kohmoto models: Exactly solvable playground for Mottness and Non-Fermi Liquid.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-03-27 DOI: 10.1088/1361-648X/adc64c

Miaomiao Zhao, Wei-Wei Yang, Yin Zhong

引用次数: 0

EXPLORING THE INTERACTIONS OF ZDDP ADDITIVE WITH HEMATITE SURFACES: A DFT+U STUDY.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-03-26 DOI: 10.1088/1361-648X/adc5c2

Davide Sarpa, David Daniel O'Regan, Vasilios Bakolas, Joanna Procelewska, Joerg Franke, Philipp Rödel, Marcus Wolf, Chris-Kriton Skylaris

{"title":"EXPLORING THE INTERACTIONS OF ZDDP ADDITIVE WITH HEMATITE SURFACES: A DFT+U STUDY.","authors":"Davide Sarpa, David Daniel O'Regan, Vasilios Bakolas, Joanna Procelewska, Joerg Franke, Philipp Rödel, Marcus Wolf, Chris-Kriton Skylaris","doi":"10.1088/1361-648X/adc5c2","DOIUrl":"https://doi.org/10.1088/1361-648X/adc5c2","url":null,"abstract":"The class of zinc dialkyldithiophosphates (ZDDPs) has been the most widely used anti-wear additiveclass in the automotive industry for over 60 years, yet the pathway to the generation of the protectivetribofilm remains elusive. In this context, density functional theory (DFT) can be utilized to investigatethe interactions between ZDDPs and materials surfaces. We employed DFT+U calculations toexamine the electronic structure of bulk hematite and three relevant (0001) surface terminations:Fe-O-Fe, O-Fe-Fe, and HO-Fe-Fe. Our results demonstrate that, while the Fe-O-Fe and HO-Fe-Feslabs are insulating, the O-Fe-Fe terminated slab is metallic due to the formation of surface statesfrom O dangling bonds. Additionally, we found that ZDDP binds more strongly on the Fe-O-Feslab, leading to changes in ZDDP geometry and atomic charges. Minimal changes are observedwhen bound to the other surfaces. We have provided an in-depth study of the electronic structures ofhematite and its surfaces and their interaction with ZDDP. The new insights from this work provide anew path that can be used to understand the decomposition pathways of ZDDPs on metallic surfaces.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730563","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

Unlocking magnetic ferro-rotational functionalities.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-03-26 DOI: 10.1088/1361-648X/adc5c3

Junjie Yang, Fei-Ting Huang, Sang-Wook Cheong

{"title":"Unlocking magnetic ferro-rotational functionalities.","authors":"Junjie Yang, Fei-Ting Huang, Sang-Wook Cheong","doi":"10.1088/1361-648X/adc5c3","DOIUrl":"https://doi.org/10.1088/1361-648X/adc5c3","url":null,"abstract":"Ferro-rotation (FR) phenomena-arising from intrinsic crystallographic rotational distortions-have only recently gained significant attention, despite the long-known presence of FR distortions in various compounds. Such phenomena include multiferroicity linked to helical spin order and electric field-induced optical activity. However, the broader relationship between FR and magnetic ordering remains largely unexplored and poorly understood. This study delves into the interplay between magnetic order and FR identifies potential materials capable of hosting magnetic FR and explores the interaction between magnetic FR and external stimuli. Our analysis reveals that out of the 122 magnetic point groups, 43 of them exhibit magnetic FR. Materials belonging to these magnetic point groups hold promise for demonstrating magnetic order-induced FR. Notably, the combination of parity/time reversal-odd antiferromagnetic order and FR can lead to the emergence of directionally nonreciprocal spin waves, as exemplified in MnTiO3. Moreover, our investigation uncovers novel magnetic order-induced switchable chirality, when magnetic FR objects are exposed to external electric fields or temperature gradients. Overall, this research elucidates the intricate relationship between FR, magnetic order, and external perturbations, revealing the untapped potential and functionalities of magnetic FR materials.&#xD.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730605","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

Spiral folding of a flexible chain of chiral active particles.

IF 2.3 4区物理与天体物理

Journal of Physics: Condensed Matter Pub Date : 2025-03-26 DOI: 10.1088/1361-648X/adc5c1

Shalabh K Anand

{"title":"Spiral folding of a flexible chain of chiral active particles.","authors":"Shalabh K Anand","doi":"10.1088/1361-648X/adc5c1","DOIUrl":"https://doi.org/10.1088/1361-648X/adc5c1","url":null,"abstract":"We investigate a flexible polymer chain made up of chiral active Brownian particles in two dimensions using computer simulations. In the presence of chiral active Brownian forces, the radius of gyration of the chain reduces significantly. We further identify the formation of spirals using the tangent-tangent correlation to characterize the internal structure of the chain. The polymer chain forms a pair of spirals with opposite spiral turns on both ends of the polymer. We compute the number of turns of both spirals, and find that the total number of turns increases with angular frequency as well as P{'e}clet number. However, the spirals become weak and the number of turns decreases at a very high P{'e}clet number. We draw a phase diagram using the turn number. The end-to-end correlation displays oscillatory behavior, which signifies the rotational dynamics of the chain. We quantify the rotation frequency from the end-to-end vector, which follows a power law behavior with exponent $3/2$. We also provide a scaling relation between the radius of gyration and the chain length, and the exponent decreases significantly in the presence of chiral active forces.","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730585","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