arXiv - PHYS - Strongly Correlated Electrons最新文献

{"title":"Full distribution of local observables in an exactly solvable current carrying steady states of a driven XXZ chain","authors":"Sandipan Manna, G J Sreejith","doi":"arxiv-2409.10458","DOIUrl":"https://doi.org/arxiv-2409.10458","url":null,"abstract":"Current carrying steady states of interacting spins chains exhibit rich\u0000structures generated through an interplay of current induced correlations and\u0000energetic constraints from the Hamiltonian. The XXZ spin chain when coupled to\u0000maximally polarizing Lindblad terms admits an exact solution in a matrix\u0000product state (MPS) form. We use this exact solution to study the correlations\u0000and distributions of simple local spin observables in the non equilibrium\u0000steady state (NESS). We present exact expressions for spin correlators, entropy\u0000per site, cumulant generating functions for distributions of local observables\u0000in the XX limit (Ising anisotropy $Delta=0$). Further, we use the exact MPS\u0000solution in systems with $Delta>0$, to numerically exactly calculate the\u0000entropy, correlations, as well as distributions of spin observables in blocks\u0000as large as $nsim 200$ sites allowing an estimation of the rate functions. The\u0000$z$ magnetization distribution is consistant with short range spin correlations\u0000in the $z$ direction while the $x$-magnetization shows a double peak structure\u0000at larger $Delta$ suggesting short range ferromagnetic ordering. We find that\u0000the distribution of $z$-magnetization sharpens for parameters where the current\u0000is maximized.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"88 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261799","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}

{"title":"Magnetization dependent anisotropic topological properties in EuCuP","authors":"Jian Yuan, Xianbiao Shi, Hong Du, Xia Wang, Jinguang Cheng, Baotian Wang, Ruidan Zhong, Shihao Zhang, Yanfeng Guo","doi":"arxiv-2409.10061","DOIUrl":"https://doi.org/arxiv-2409.10061","url":null,"abstract":"The correlation between magnetism and nontrivial topological band structure\u0000serves as a unique venue for discovering exotic topological properties.\u0000Combining magnetotransport measurements and first-principles calculations, we\u0000unveil herein that the hexagonal EuCuP holds topologically trivial state in the\u0000paramagnetic structure, while strong magnetization dependent anisotropic\u0000topological states in the spin-polarization structures. Specifically, it hosts\u0000a trivial topological state in the in-plane spin-polarization structure, while\u0000a Weyl semimetal state in the out-of-plane spin-polarization structure. Our\u0000scaling analysis suggests that the intrinsic Berry curvature in the\u0000spin-polarization structures can account for the observed large anisotropic\u0000anomalous Hall effect. First-principles calculations show that the\u0000magnetization and the spin-orbit coupling simultaneously play essential roles\u0000for the appearance of the four pairs of Weyl points in the out-of-plane\u0000spin-polarization structure. Our work therefore establishes in EuCuP the\u0000intimate relation between magnetism and the nontrivial topological states,\u0000which would be instructive for future study on this key issue of topological\u0000physics.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261789","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}

{"title":"Structure and magnetic properties of a family of two-leg spin ladder compounds Ba2RE2Ge4O13 (RE = Pr, Nd, and Gd-Ho) with strong rung interaction","authors":"Jin Zhou, Andi Liu, Fangyuan Song, Langsheng Ling, Jingxin Li, Wei Tong, Zhengcai Xia, Gaoshang Gong, Yongqiang Wang, Jinkui Zhao, Hanjie Guo, Zhaoming Tian","doi":"arxiv-2409.09686","DOIUrl":"https://doi.org/arxiv-2409.09686","url":null,"abstract":"Spin ladders represent a special type of low-dimensional magnets allowing the\u0000study of dimensional crossover from one-dimensional spin chain to\u0000two-dimensional square-lattice spin systems, and different magnetic ground\u0000states can emerge in such system depending on the exchange interaction\u0000parameters of rungs and legs of the ladder. Even intensive investigations have\u0000been performed on the 3d transition-metal-based spin ladder compounds, but the\u0000materials constructed by the rare-earth ions are still rare. Herein, we report\u0000a family of RE-based spin ladder compounds Ba2RE2Ge4O13 (RE=Pr,Nd,Gd-Ho)\u0000crystallized into the monoclinic structure with the space group C2/c. The\u0000structural analysis reveals that the RE ions form structurally a two-leg spin\u0000ladder motif, which are bridged through the RE-O-RE pathways and RE-O-Ge-O-RE\u0000routes along the rung and leg directions, respectively. Moreover, the rung\u0000distance within the RE2O12 dimer is much shorter than the leg distance,\u0000suggesting Ba2RE2Ge4O13 to be a strong-rung spin ladder system. All the\u0000synthesized Ba2RE2Ge4O13 (RE=Pr,Nd,Gd-Ho) compounds exhibit the dominant\u0000antiferromagnetic interactions and absence of magnetic order down to 1.8K.\u0000Among the family members, Ba2Dy2Ge4O13 can be described by Jeff=1/2 Kramers\u0000doublet states, which exhibits the coexistence of short-range spin correlations\u0000maximized at Tsr~2.4K and long-range AFM order at TN=0.81K indicated by the low\u0000temperature specific heat data. The short-range spin correlation is ascribed to\u0000the development of rung exchange interactions of Dy2O12 dimers and the\u0000long-rang AFM order is related to the enhanced leg-or inter-laddder couplings\u0000at reduced temperatures. This family of Ba2RE2Ge4O13 compounds thereby provide\u0000a rare platform to investigate the novel spin ladder physics with spin-orbit\u0000entangled Jeff=1/2 moments beyond the 3d TM-based counterparts.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261792","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}

{"title":"Inverted duality of Hubbard model and an equation for the Green's function","authors":"Xiao-Yong Feng","doi":"arxiv-2409.09562","DOIUrl":"https://doi.org/arxiv-2409.09562","url":null,"abstract":"The Hubbard model, a cornerstone in the field of condensed matter physics,\u0000serves as a fundamental framework for investigating the behavior of strongly\u0000correlated electron systems. This paper presents a novel perspective on the\u0000model, uncovering its inherent inverted duality which has profound implications\u0000for our comprehension of these complex systems. Taking advantage of this\u0000special mathematical property, we have formulated an equation that the electron\u0000Green's function must satisfy. This derivation not only enriches the\u0000theoretical foundation of the Hubbard model but also leads to the development\u0000of a concise analytical expression for the Mott transition. Our findings pave\u0000the way for further exploration and potentially new insights into the dynamics\u0000of electron correlations and phase transitions in condensed matter.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"212 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261797","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}

{"title":"Many-body Keldysh Crossover in the DC-driven Haldane Spin Chain","authors":"Koichi Okazaki, Shun Okumura, Shintaro Takayoshi, Takashi Oka","doi":"arxiv-2409.09578","DOIUrl":"https://doi.org/arxiv-2409.09578","url":null,"abstract":"We theoretically study nonlinear processes driven by a DC spin-electric field\u0000in the antiferromagnetic spin-1 Heisenberg model starting from the ground state\u0000in the Haldane phase. The DC spin-electric field generates finite spin current\u0000and accumulation since the symmetry protected topological order is destroyed by\u0000the field. We find two microscopic mechanisms responsible for the breakdown and\u0000a crossover between them: In weak fields, tripron-antitripron pair creation\u0000occurs through the tunneling mechanism, and in strong fields, the system is\u0000described by an effective Hamiltonian breaking the protecting symmetries. We\u0000analyze the numerically obtained results in terms of the\u0000Dykhne--Davis--Pechukas theory and Floquet theory, verifying the universal\u0000picture of the many-body Keldysh crossover in the DC-driven quantum spin\u0000systems.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261793","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}

{"title":"Concurrence and entanglement on a 16-site spin-1/2 pyrochlore cluster","authors":"C. Wei, S. H. Curnoe","doi":"arxiv-2409.09576","DOIUrl":"https://doi.org/arxiv-2409.09576","url":null,"abstract":"We examine the entanglement of the ground state of a 16-site spin-1/2\u0000pyrochlore cluster in the quantum spin ice regime via various calculations of\u0000${cal I}$-concurrence. Exact ground state solutions to a quantum spin\u0000Hamiltonian with four nearest-neighbour exchange parameters were obtained using\u0000exact diagonalization. We present results for the ground state ${cal\u0000I}$-concurrence in a region within the parameter space of the model where the\u0000ground state is a singlet. We discuss variations in the ${cal I}$-concurrence\u0000in the context of the composition of the ground state and we demonstrate how a\u0000lattice distortion disentangles the state.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261794","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}

{"title":"Ground State Phase Diagram of $text{SU}(3)$ $t$-$J$ Chain","authors":"Junhao Zhang, Jie Hou, Jie Lou, Yan Chen","doi":"arxiv-2409.09344","DOIUrl":"https://doi.org/arxiv-2409.09344","url":null,"abstract":"Distinct from the $text{SU}(2)$ case, the fermionic systems with\u0000$text{SU}(N)$ symmetry are expected to exhibit novel physics, such as exotic\u0000singlet formation. Using the density matrix renormalization group technique, we\u0000obtain the ground state phase diagram of the $text{SU}(3)$ $t$-$J$ chain for\u0000density $n<1$. The ground state phase diagram includes the Luttinger liquid,\u0000the extended Luther-Emery liquid characterized by a spin gap, and the phase\u0000separation state. We quantitatively assess the characteristics of the three\u0000phases by measuring spin gap, compressibility, various correlation functions\u0000and structure factors. We further study the extended Luther-Emery liquid phase\u0000and discover molecular superfluid quasi-long-range order. The mechanism of the\u0000molecular superfluid is the combination of three $text{SU}(3)$ fermions on\u0000sites that are not completely connected. Accordingly, we can speculate the\u0000behavior of the $text{SU}(N)$ $t$-$J$ chain model with larger $N$ values,\u0000operating within the same filling regime.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261795","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}

{"title":"Direct evidence for anisotropic magnetic interaction in $α$-RuCl$_3$ from polarized inelastic neutron scattering","authors":"Markus Braden, Xiao Wang, Alexandre Bertin, Paul Steffens, Yixi Su","doi":"arxiv-2409.08854","DOIUrl":"https://doi.org/arxiv-2409.08854","url":null,"abstract":"Polarized neutron scattering experiments reveal the anisotropy of magnetic\u0000correlations in the candidate Kitaev material $alpha$-RuCl$_3$. The anisotropy\u0000of the inelastic response at the magnetic Bragg positions is just opposite to\u0000the expectation for a simple Heisenberg model. Near the antiferromagnetic $q$\u0000vector, there are no low-energy transversal magnon modes directly documenting\u0000the fully anisotropic and bond-directional character of the magnetic\u0000interaction in $alpha$-RuCl$_3$. However, other findings disagree with a\u0000simple or strongly dominant Kitaev component.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261798","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}

{"title":"Negative charge transfer energy in correlated compounds","authors":"Robert J. Green, George A. Sawatzky","doi":"arxiv-2409.09176","DOIUrl":"https://doi.org/arxiv-2409.09176","url":null,"abstract":"In correlated compounds containing cations in high formal oxidation states\u0000(assigned by assuming that anions attain full valence shells), the energy of\u0000ligand to cation charge transfer can become small or even negative. This yields\u0000compounds with a high degree of covalence and can lead to a self-doping of\u0000holes into the ligand states of the valence band. Such compounds are of\u0000particular topical interest, as highly studied perovskite oxides containing\u0000trivalent nickel or tetravalent iron are negative charge transfer systems, as\u0000are nickel-containing lithium ion battery cathode materials. In this report, we\u0000review the topic of negative charge transfer energy, with an emphasis on plots\u0000and diagrams as analysis tools, in the spirit of the celebrated Tanabe-Sugano\u0000diagrams which are the focus of this Special Topics Issue.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261796","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}

{"title":"Magnetic phase diagram of the three-dimensional doped Hubbard model","authors":"Liam Rampon, Fedor Šimkovic IV, Michel Ferrero","doi":"arxiv-2409.08848","DOIUrl":"https://doi.org/arxiv-2409.08848","url":null,"abstract":"We establish the phase diagram of the Hubbard model on a cubic lattice for a\u0000wide range of temperatures, dopings and interaction strengths, considering both\u0000commensurate and incommensurate magnetic orders. We use the dynamical\u0000mean-field theory together with an efficient method to compute the free energy\u0000which enable the determination of the correct ordering vectors. Besides an\u0000antiferromagnetic state close to half-filling, we identify a number of\u0000different magnetic spiral phases with ordering vectors $(q,pi,pi)$,\u0000$(q,q,pi)$ and $(q,q,q)$ as well as a region with close competition between\u0000them, hinting at spatial phase separation or at the onset of a stripe phase.\u0000Additionally, we extensively study several thermodynamic properties with direct\u0000relevance to cold-atom experiments: the entropy, energy and double-occupancy.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261857","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}