arXiv - PHYS - Strongly Correlated Electrons最新文献_第2页

Charge and spin properties of a generalized Wigner crystal realized in the moiré WSe$_2$/WS$_2$ heterobilayer 在摩尔 WSe$_2$/WS$_2$ 异质层中实现的广义维格纳晶体的电荷和自旋特性

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-17 DOI: arxiv-2409.11202

Andrzej Biborski, Michał Zegrodnik

{"title":"Charge and spin properties of a generalized Wigner crystal realized in the moiré WSe$_2$/WS$_2$ heterobilayer","authors":"Andrzej Biborski, Michał Zegrodnik","doi":"arxiv-2409.11202","DOIUrl":"https://doi.org/arxiv-2409.11202","url":null,"abstract":"We examine the charge and spin properties of an effective single-band model\u0000representing a moir'e superlattice of the WSe$_{2}$/WS$_{2}$ heterobilayer. We\u0000focus on the $2/3$ electron filling, which refers to the formation of a\u0000generalized Wigner crystal, as evidenced experimentally. Our approach is based\u0000on the extended-Hubbard model on a triangular lattice with non-interacting part\u0000effectively describing a spin-split band due to Ising-type spin-orbit coupling.\u0000We investigate the system in the regime of strong on-site Coulomb repulsion and\u0000the ground state of the Hamiltonian is obtained with the use of the Density\u0000Matrix Renormalization Group formulated within the Matrix Product State\u0000approach. According to our analysis, based on the density-density correlation\u0000functions resolved in the momentum space, a transition from the metallic to the\u0000insulating state appears with increasing intersite electron-electron\u0000interactions. This transition is identified as being concomitant with the\u0000emergence of a generalized Wigner crystal that realizes the honeycomb lattice\u0000pattern. We investigate the magnetic properties of such a Wigner crystal state\u0000and find that the presence of spin-valley polarization and the increased\u0000intersite repulsion induce spin canting of the out-of-plane antiferromagnetic\u0000ordering.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Universally non-diverging Grüneisen parameter at critical points 临界点上普遍不发散的格吕奈森参数

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-17 DOI: arxiv-2409.11086

Samuel M. Soares, Lucas Squillante, Henrique S. Lima, Constantino Tsallis, Mariano de Souza

引用次数: 0

Monte Carlo Methods in the Manifold of Hartree-Fock-Bogoliubov Wave Functions 哈特里-福克-波哥留布夫波函数漫域中的蒙特卡罗方法

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-17 DOI: arxiv-2409.11571

Ettore Vitali, Peter Rosenberg, Shiwei Zhang

引用次数: 0

Hilbert Space Fragmentation in the Chiral Luttinger Liquid 手性鲁丁格液体中的希尔伯特空间碎片

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-16 DOI: arxiv-2409.10359

Alexandre Chaduteau, Nyan Raess, Henry Davenport, Frank Schindler

引用次数: 0

Probing phase transition and underlying symmetry breaking via entanglement entropy scanning 通过纠缠熵扫描探测相变和潜在的对称性破缺

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-16 DOI: arxiv-2409.09942

Zhe Wang, Zehui Deng, Zhiyan Wang, Yi-Ming Ding, Wenan Guo, Zheng Yan

{"title":"Probing phase transition and underlying symmetry breaking via entanglement entropy scanning","authors":"Zhe Wang, Zehui Deng, Zhiyan Wang, Yi-Ming Ding, Wenan Guo, Zheng Yan","doi":"arxiv-2409.09942","DOIUrl":"https://doi.org/arxiv-2409.09942","url":null,"abstract":"Using entanglement entropy (EE) to probe the intrinsic physics of the novel\u0000phases and phase transitions in quantum many-body systems is an important but\u0000challenging topic in condensed matter physics. Thanks to our newly developed\u0000bipartite-reweight-annealing algorithm, we can systematically study EE\u0000behaviors near both first and second-order phase transition points of\u0000two-dimensional strongly correlated systems by scanning the EE across a large\u0000parameter region, which was super difficult previously due to the huge\u0000computation resources demanded. Interestingly, we find that the EE or its\u0000derivative diverges at the critical point, which essentially reveals the phase\u0000transition involving discrete or continuous symmetry breaking. What's more, we\u0000observe that the peak of the EE curve can detect first-order phase transitions\u0000at high symmetry breaking points, separating phases with lower symmetry broken.\u0000This behavior also applies to the symmetry-enhanced first-order phase\u0000transition in the two-dimensional chequerboard $J-Q$ model, where the emergent\u0000higher symmetry arises from the related deconfined criticality beyond the\u0000Landau-Ginzburg-Wilson paradigm. This work points to new phenomena and\u0000mechanisms that can help us better identify different phase transitions and the\u0000underlying symmetry breaking.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electronic vs. phononic thermal transport in Cr-doped V2O3 thin films across the Mott transition 掺杂铬的 V2O3 薄膜中跨越莫特转变的电子热传输与声子热传输

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-16 DOI: arxiv-2409.10748

Johannes Mohr, Kiumars Aryana, Md. Rafiqul Islam, Dirk J. Wouters, Rainer Waser, Patrick E. Hopkins, Joyeeta Nag, Daniel Bedau

{"title":"Electronic vs. phononic thermal transport in Cr-doped V2O3 thin films across the Mott transition","authors":"Johannes Mohr, Kiumars Aryana, Md. Rafiqul Islam, Dirk J. Wouters, Rainer Waser, Patrick E. Hopkins, Joyeeta Nag, Daniel Bedau","doi":"arxiv-2409.10748","DOIUrl":"https://doi.org/arxiv-2409.10748","url":null,"abstract":"Understanding the thermal conductivity of chromium doped V2O3 is crucial for\u0000optimizing the design of selectors for memory and neuromorphic devices. We\u0000utilized the time-domain thermoreflectance technique to measure the thermal\u0000conductivity of chromium doped V2O3 across varying concentrations, spanning the\u0000doping induced metal-insulator transition. In addition, different oxygen\u0000stoichiometries and film thicknesses were investigated in their crystalline and\u0000amorphous phases. Chromium doping concentration (0%-30%) and the degree of\u0000crystallinity emerged as the predominant factors influencing the thermal\u0000properties, while the effect of oxygen flow (600-1400 ppm) during deposition\u0000proved to be negligible. Our observations indicate that even in the metallic\u0000phase of V2O3, the lattice contribution is the dominant factor in thermal\u0000transport with no observable impact from the electrons on heat transport.\u0000Finally, the thermal conductivity of both amorphous and crystalline V2O3 was\u0000measured at cryogenic temperatures (80-450 K). Our thermal conductivity\u0000measurements as a function of temperature reveal that both phases exhibit\u0000behavior similar to amorphous materials, indicating pronounced phonon\u0000scattering effects in the crystalline phase of V2O3.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anomalous quasielastic scattering contribution in the centrosymmetric multi-$mathbf{q}$ helimagnet SrFeO$_3$ 中心对称多$mathbf{q}$自重磁体 SrFeO$_3$ 中的反常准弹性散射贡献

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-16 DOI: arxiv-2409.10214

N. D. Andriushin, J. Grumbach, A. A. Kulbakov, Y. V. Tymoshenko, Y. A. Onykiienko, R. Firouzmandi, E. Cheng, S. Granovsky, Y. Skourski, J. Ollivier, H. C. Walker, V. Kocsis, B. Buchner, B. Keimer, M. Doerr, D. S. Inosov, D. C. Peets

{"title":"Anomalous quasielastic scattering contribution in the centrosymmetric multi-$mathbf{q}$ helimagnet SrFeO$_3$","authors":"N. D. Andriushin, J. Grumbach, A. A. Kulbakov, Y. V. Tymoshenko, Y. A. Onykiienko, R. Firouzmandi, E. Cheng, S. Granovsky, Y. Skourski, J. Ollivier, H. C. Walker, V. Kocsis, B. Buchner, B. Keimer, M. Doerr, D. S. Inosov, D. C. Peets","doi":"arxiv-2409.10214","DOIUrl":"https://doi.org/arxiv-2409.10214","url":null,"abstract":"Centrosymmetric compounds which host three-dimensional topological spin\u0000structures comprise a distinct subclass of materials in which\u0000multiple-$mathbf{q}$ magnetic order is stabilized by anisotropy and bond\u0000frustration in contrast to the more common path of antisymmetric exchange\u0000interactions. Here we investigate static and dynamic magnetic properties of the\u0000cubic perovskite SrFeO$_3$ $unicode{x2013}$ a rare example of a\u0000centrosymmetric material hosting two types of topological spin textures:\u0000skyrmion- and hedgehog-lattice phases. Our detailed magnetization and\u0000dilatometry measurements describe the domain selection processes and phase\u0000transitions in SrFeO$_3$. Spin excitations are investigated using inelastic\u0000neutron scattering for all three zero-field phases. In the higher-temperature\u0000ordered phases, high-energy magnons increasingly lose coherence, so that spin\u0000fluctuations are dominated by a distinct quasielastic component at low\u0000energies. We anticipate that this could be generic to symmetric helimagnets in\u0000which the chiral symmetry is spontaneously broken by the magnetic order.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrostatic and chemical pressure driven crossover from commensurate to the incommensurate state of the Weyl semimetal Mn$_{3+x}$Sn$_{1-x}$ 静水压力和化学压力驱动的韦尔半金属 Mn$_{3+x}$Sn$_{1-x}$ 从相称态向不相称态的跨越

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-16 DOI: arxiv-2409.10012

K. Bhattacharya, A. K. Bharatwaj, C. Singh, R. Gupta, R. Khasanov, S. Kanungo, A. K. Nayak, M. Majumder

{"title":"Hydrostatic and chemical pressure driven crossover from commensurate to the incommensurate state of the Weyl semimetal Mn$_{3+x}$Sn$_{1-x}$","authors":"K. Bhattacharya, A. K. Bharatwaj, C. Singh, R. Gupta, R. Khasanov, S. Kanungo, A. K. Nayak, M. Majumder","doi":"arxiv-2409.10012","DOIUrl":"https://doi.org/arxiv-2409.10012","url":null,"abstract":"The observation of large intrinsic anomalous Hall conductivity (AHC) in the\u0000non-collinear antiferromagnetic (AFM) phase of the Weyl semimetal Mn$_3$Sn\u0000generates enormous interest in uncovering the entanglement between the real\u0000space magnetic ordering and the momentum space band structure. Previous studies\u0000show that changes in the magnetic structure induced by the application of\u0000hydrostatic and chemical pressure can significantly affect the AHC of\u0000Mn$_{3+x}$Sn$_{1-x}$ system. Here, we employ the muon spin relaxation/rotation\u0000($mu^+$SR) technique to systematically investigate the evolution of different\u0000magnetic states in the Mn$_{3+x}$Sn$_{1-x}$ as a function of hydrostatic and\u0000chemical pressure. We find two muon sites experimentally, which is also\u0000supported by our textit{ab initio} calculations. Our $mu^+$SR experiments\u0000affirm that the $x = 0.05$ compound exhibits a commensurate magnetic state\u0000throughout the magnetically ordered phase below the Neel temperature $T_N\u0000approx 420$~K in ambient pressure. In contrast, we observe an incommensurate\u0000magnetic state below $T_{IC} sim 175$~K when a hydrostatic pressure of 1.5~GPa\u0000is applied. A similar transition from the commensurate to incommensurate state\u0000is also found with chemical pressure for $x = 0.04$ and $x = 0.03$, using\u0000$mu^+$SR and elastic neutron scattering experiments. Using band structure\u0000calculations, we have shown the emergence of Fermi nesting in Mn$_3$Sn and the\u0000subsequent development of incommensurate magnetic ordering under\u0000hydrostatic/chemical pressure.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bootstrapping the Quantum Hall problem 引导量子霍尔问题

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-16 DOI: arxiv-2409.10619

Qiang Gao, Ryan A. Lanzetta, Patrick Ledwith, Jie Wang, Eslam Khalaf

{"title":"Bootstrapping the Quantum Hall problem","authors":"Qiang Gao, Ryan A. Lanzetta, Patrick Ledwith, Jie Wang, Eslam Khalaf","doi":"arxiv-2409.10619","DOIUrl":"https://doi.org/arxiv-2409.10619","url":null,"abstract":"The bootstrap method aims to solve problems by imposing constraints on the\u0000space of physical observables, which often follow from physical assumptions\u0000such as positivity and symmetry. Here, we employ a bootstrap approach to study\u0000interacting electrons in the lowest Landau level by minimizing the energy as a\u0000function of the static structure factor subject to a set of constraints,\u0000bypassing the need to construct the full many-body wavefunction. This approach\u0000rigorously lower bounds the ground state energy, making it complementary to\u0000conventional variational upper bounds. We show that the lower bound we obtain\u0000is relatively tight, within at most 5% from the ground state energy computed\u0000with exact diagonalization (ED) at small system sizes, and generally gets\u0000tighter as we include more constraints. In addition to energetics, our results\u0000reproduce the correct power law dependence of the pair correlation function at\u0000short distances and the existence of a large entanglement gap in the\u0000two-particle entanglement spectra for the Laughlin states at $nu = 1/3$. We\u0000further identify signatures of the composite Fermi liquid state close to\u0000half-filling. This shows that the bootstrap approach is capable, in principle,\u0000of describing non-trivial gapped topologically ordered, as well as gapless,\u0000phases. At the end, we will discuss possible extensions and limitations of this\u0000approach. Our work establishes numerical bootstrap as a promising method to\u0000study many-body phases in topological bands, paving the way to its application\u0000in moir'e platforms where the energetic competition between fractional quantum\u0000anomalous Hall, symmetry broken, and gapless states remains poorly understood.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Successive topological phase transitions in two distinct spin-flop phases on the honeycomb lattice 蜂巢晶格上两种截然不同的自旋翻转相中的连续拓扑相变

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-16 DOI: arxiv-2409.10439

Xudong Li, Jize Zhao, Jinbin Li, Qiang Luo

{"title":"Successive topological phase transitions in two distinct spin-flop phases on the honeycomb lattice","authors":"Xudong Li, Jize Zhao, Jinbin Li, Qiang Luo","doi":"arxiv-2409.10439","DOIUrl":"https://doi.org/arxiv-2409.10439","url":null,"abstract":"The Kitaev magnets with bond-dependent interactions have garnered\u0000considerable attention in recent years for their ability to harbor exotic\u0000phases and nontrivial excitations. The topological magnons, which are indicated\u0000by nonzero Chern number and thermal Hall conductivity, are proposed to\u0000partially explain thermal Hall measurements in real materials. Hitherto,\u0000topological magnons have been extensively explored when the magnetic field is\u0000normal to the honeycomb plane, but their topological characteristics are less\u0000studied in the presence of in-plane magnetic field. Here, we study two distinct\u0000in-plane field induced spin-flop phases in the $Gamma$-$Gamma'$ model, both\u0000of which are off-diagonal couplings that have intimate relation to the Kitaev\u0000interaction. The two spin-flop phases are distinguished by their out-of-plane\u0000spin components which can be either antiparallel or parallel, thus dubbing\u0000antiferromagnetic (AFM) or ferromagnetic (FM) spin-flop phases, respectively.\u0000We map out topological phase diagrams for both phases, revealing a rich pattern\u0000of the Chern number over exchange parameters and magnetic field. We\u0000analytically calculate the boundaries of topological phase transitions when the\u0000magnetic field is along the $a$ and $b$ directions. We find that the thermal\u0000Hall conductivity and its derivative display contrasting behaviors when\u0000crossing different topological phase transitions. The striking difference of\u0000the two phases lies in that when the magnetic field is along the $b$ direction,\u0000topological magnons are totally absent in the AFM spin-flop phase, while they\u0000can survive in the FM analogue in certain parameter regions.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0