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Charge Susceptibility and Kubo Response in Hatsugai-Kohmoto-related Models 初合光子相关模型中的电荷敏感性和久保反应
arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-11 DOI: arxiv-2409.07522
Yuhao Ma, Jinchao Zhao, Edwin W. Huang, Dhruv Kush, Barry Bradlyn, Philip W. Phillips
{"title":"Charge Susceptibility and Kubo Response in Hatsugai-Kohmoto-related Models","authors":"Yuhao Ma, Jinchao Zhao, Edwin W. Huang, Dhruv Kush, Barry Bradlyn, Philip W. Phillips","doi":"arxiv-2409.07522","DOIUrl":"https://doi.org/arxiv-2409.07522","url":null,"abstract":"We study in depth the charge susceptibility for the band Hatsugai-Kohmoto\u0000(HK) and orbital (OHK) models. As either of these models describes a Mott\u0000insulator, the charge susceptibility takes on the form of a modified Lindhard\u0000function with lower and upper Hubbard bands, thereby giving rise to a\u0000multi-pole structure. The particle-hole continuum consists of hot spots along\u0000the $omega$ vs $q$ axis arising from inter-band transitions. Such transitions,\u0000which are strongly suppressed in non-interacting systems, are obtained here\u0000because of the non-rigidity of the Hubbard bands. This modified Lindhard\u0000function gives rise to a plasmon dispersion that is inversely dependent on the\u0000momentum, resulting in an additional contribution to the conventional f-sum\u0000rule. This extra contribution originates from a long-range diamagnetic\u0000contribution to the current. This results in a non-commutativity of the\u0000long-wavelength ($qrightarrow 0$) and thermodynamic ($Lrightarrowinfty$)\u0000limits. When the correct limits are taken, we find that the Kubo response\u0000computed with either open or periodic boundary conditions yields identical\u0000results that are consistent with the continuity equation contrary to recent\u0000claims. We also show that the long wavelength pathology of the current noted\u0000previously also plagues the Anderson impurity model interpretation of dynamical\u0000mean-field theory (DMFT). Coupled with our previous workcite{mai20231} which\u0000showed that HK is the correct $d=infty$ limit of the Hubbard model, we arrive\u0000at the conclusion that single-orbital HK=DMFT.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"172 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180418","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
Doping Tunable CDW Phase Transition in Bulk 1T-ZrSe$_2$ 块状 1T-ZrSe$_2$ 中的掺杂可调 CDW 相变
arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-11 DOI: arxiv-2409.07342
Andreas Ørsted, Alessandro Scarfato, Céline Barreteau, Enrico Giannini, Christoph Renner
{"title":"Doping Tunable CDW Phase Transition in Bulk 1T-ZrSe$_2$","authors":"Andreas Ørsted, Alessandro Scarfato, Céline Barreteau, Enrico Giannini, Christoph Renner","doi":"arxiv-2409.07342","DOIUrl":"https://doi.org/arxiv-2409.07342","url":null,"abstract":"Tuneable electronic properties in transition metal dichalcogenides (TMDs) are\u0000essential to further their use in device applications. Here, we present a\u0000comprehensive scanning tunnelling microscopy and spectroscopy study of a\u0000doping-induced charge density wave (CDW) in semiconducting bulk 1T-ZrSe$_2$. We\u0000find that atomic impurities which locally shift the Fermi level ($E_F$) into\u0000the conduction band trigger a CDW reconstruction concomitantly to the opening\u0000of a gap at $E_F$. Our findings shed new light on earlier photoemission\u0000spectroscopy and theoretical studies of bulk 1T-ZrSe$_2$, and provide a local\u0000understanding of the electron-doping mediated CDW transition observed in\u0000semiconducting TMDs.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180464","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
Exciton crystal melting and destruction by disorder in bilayer quantum hall system with total filling factor one 总填充因子为 1 的双层量子霍尔系统中激子晶体的熔化和无序破坏
arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-10 DOI: arxiv-2409.06155
Zhengfei Hu, Kun Yang
{"title":"Exciton crystal melting and destruction by disorder in bilayer quantum hall system with total filling factor one","authors":"Zhengfei Hu, Kun Yang","doi":"arxiv-2409.06155","DOIUrl":"https://doi.org/arxiv-2409.06155","url":null,"abstract":"Bilayer quantum hall system with total filling factor 1 was studied in the\u0000regime of heavy layer imbalance in a recent transport experiment (Ref. 1), with\u0000intriguing new findings. We demonstrate in this paper that 1) the exciton\u0000Wigner crystal in this regime can melt into a superfluid phase, giving rise to\u0000re-entrant superfluid behavior; 2) in the presence of disorder, electron and\u0000hole Wigner crystals in the two layers go through a locking/decoupling\u0000transition as layer separation increases, resulting in a sudden change in the\u0000counter flow conductance. Comparison will be made with the findings of Ref. 1.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180461","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
Absence of itinerant ferromagnetism in a cobalt-based oxypnictide 钴基氧化物中不存在巡回铁磁性
arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-10 DOI: arxiv-2409.06337
Hua-Xun Li, Hao Jiang, Yi-Qiang Lin, Jia-Xin Li, Shi-Jie Song, Qin-Qing Zhu, Zhi Ren, Guang-Han Cao
{"title":"Absence of itinerant ferromagnetism in a cobalt-based oxypnictide","authors":"Hua-Xun Li, Hao Jiang, Yi-Qiang Lin, Jia-Xin Li, Shi-Jie Song, Qin-Qing Zhu, Zhi Ren, Guang-Han Cao","doi":"arxiv-2409.06337","DOIUrl":"https://doi.org/arxiv-2409.06337","url":null,"abstract":"We report a layered transition-metal-ordered oxypnictide\u0000Sr$_{2}$CrCoAsO$_{3}$. The new material was synthesized by solid-state\u0000reactions under vacuum. It has an intergrowth structure with a perovskite-like\u0000Sr$_3$Cr$_2$O$_6$ unit and ThCr$_2$Si$_2$-type SrCo$_2$As$_2$ block stacking\u0000coherently along the crystallographic $c$ axis. The measurements of electrical\u0000resistivity, magnetic susceptibility, and specific heat indicate metallic\u0000conductivity from the CoAs layers and short-range antiferromagnetic ordering in\u0000the CrO$_{2}$ planes. No itinerant-electron ferromagnetism expected in CoAs\u0000layers is observed. This result, combined with the first-principles\u0000calculations and the previous reports of other CoAs-layer-based materials,\u0000suggests that the Co$-$Co bondlength plays a crucial role in the emergence of\u0000itinerant ferromagnetism.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"85 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180460","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
Insulator to Metal Transition under High Pressure in FeNb$_3$Se$_{10}$ 高压下 FeNb$_3$Se$_{10}$ 从绝缘体到金属的转变
arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-10 DOI: arxiv-2409.06460
Haozhe Wang, Shuyuan Huyan, Eoghan Downey, Yang Wang, Shane Smolenski, Du Li, Li Yang, Aaron Bostwick, Chris Jozwiak, Eli Rotenberg, Sergey L. Bud'ko, Paul C. Canfield, R. J. Cava, Na Hyun Jo, Weiwei Xie
{"title":"Insulator to Metal Transition under High Pressure in FeNb$_3$Se$_{10}$","authors":"Haozhe Wang, Shuyuan Huyan, Eoghan Downey, Yang Wang, Shane Smolenski, Du Li, Li Yang, Aaron Bostwick, Chris Jozwiak, Eli Rotenberg, Sergey L. Bud'ko, Paul C. Canfield, R. J. Cava, Na Hyun Jo, Weiwei Xie","doi":"arxiv-2409.06460","DOIUrl":"https://doi.org/arxiv-2409.06460","url":null,"abstract":"Non-magnetic FeNb$_3$Se$_{10}$ has been demonstrated to be an insulator at\u0000ambient pressure through both theoretical calculations and experimental\u0000measurements and it does not host topological surface states. Here we show that\u0000on the application of pressure, FeNb$_3$Se$_{10}$ transitions to a metallic\u0000state at around 3.0 GPa. With a further increase in pressure, its resistivity\u0000becomes independent of both temperature and pressure. Its crystal structure is\u0000maintained to at least 4.4 GPa.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180429","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
Magnetic Phase Diagram of ErB$_4$ as Explored by Neutron Scattering 通过中子散射探索 ErB$_4$ 的磁相图
arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-10 DOI: arxiv-2409.06436
Simon Flury, Wolfgang J. Simeth, Danielle R. Yahne, Daniel G. Mazzone, Eric D. Bauer, Priscila F. S. Rosa, Romain Sibille, Oksana Zaharko, Dariusz J. Gawryluk, Marc Janoschek
{"title":"Magnetic Phase Diagram of ErB$_4$ as Explored by Neutron Scattering","authors":"Simon Flury, Wolfgang J. Simeth, Danielle R. Yahne, Daniel G. Mazzone, Eric D. Bauer, Priscila F. S. Rosa, Romain Sibille, Oksana Zaharko, Dariusz J. Gawryluk, Marc Janoschek","doi":"arxiv-2409.06436","DOIUrl":"https://doi.org/arxiv-2409.06436","url":null,"abstract":"The tetragonal $4f$-electron intermetallic ErB$_4$ is characterized by strong\u0000Ising anisotropy along the tetragonal $c$ axis. The magnetic moments on the\u0000erbium sites can be mapped onto a Shastry-Sutherland (SSL) lattice resulting in\u0000geometrical frustration. At zero magnetic field ErB$_4$ exhibits collinear\u0000columnar antiferromagnetic (CAFM) order below $T_text{N} = 15.4$ K. In the\u0000presence of a magnetic field parallel to the $c$ axis, ErB$_4$ exhibits a\u0000plateau at $1/2$ of the saturation magnetization $M_text{S}$, which arises at\u0000a spin flip transition at $H_1$ $=$ 1.9 T. Fractional magnetization plateaus\u0000and other exotic spin phases are a well-established characteristic feature of\u0000frustrated spin systems. Monte Carlo simulations propose that ErB$_4$ is an\u0000ideal candidate to feature a spin supersolid phase in close vicinity of $H_1$\u0000between the CAFM and $M/M_text{S}=1/2$ plateau (HP) phase. Here we combine\u0000single-crystal neutron diffraction and inelastic neutron scattering to study\u0000the magnetic phase diagram and the crystal electric field (CEF) ground state of\u0000ErB$_4$. Our measurements as a function of magnetic field find no signature of\u0000the spin supersolid phase but allow us to determine the magnetic structure of\u0000the HP phase to be of the uuud type consistent with an Ising material. The\u0000magnetic moment $mu_{mathrm{CEF}}$ $=$ 8.96 $mu_B$ expected from the CEF\u0000configuration determined by our inelastic neutron scattering measurements is\u0000also consistent with the ordered moment observed in neutron diffraction showing\u0000that the moments are fully ordered and close to the Er$^{3+}$ free ion moment\u0000(9.6 $mu_B$).","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180430","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
Ternary nickel hydrides: a new platform for unconventional superconductivity and quantum magnetism 三元镍氢化物：非传统超导和量子磁学的新平台
arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-10 DOI: arxiv-2409.06695
Mateusz Domanski, Antonio Santacesaria, Paolo Barone, Jose Lorenzana, Wojciech Grochala
{"title":"Ternary nickel hydrides: a new platform for unconventional superconductivity and quantum magnetism","authors":"Mateusz Domanski, Antonio Santacesaria, Paolo Barone, Jose Lorenzana, Wojciech Grochala","doi":"arxiv-2409.06695","DOIUrl":"https://doi.org/arxiv-2409.06695","url":null,"abstract":"In this letter, we propose ternary nickel hydrides MNiH2 (M = Li, Na) as new\u0000materials that mimic cuprate physics but have important differences and\u0000interesting properties. Ni-H bands are wider than in oxides due to shorter bond\u0000lengths and covalency is larger than in Ni oxides which leads to a large scale\u0000of magnetic interactions. The charge transfer energy is smaller than in LaNiO2\u0000which in cuprates translates to a larger Tc. We notice the formation of the\u0000electride band close to the Fermi surface which appears due to H vacancy along\u0000the c lattice vector. The considerable difference with cuprates arises from dz2\u0000orbitals hybridization with interstitial orbitals allowing charge transfer to\u0000an apical vacancy state and self-doping the cuprate like Ni dx2-y2 H s\u0000antibonding bands which suggests that stoichiometric NaNiH2 may already be\u0000metallic and superconducting.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180425","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
Stabilization of a two-dimensional quantum electron solid in perpendicular magnetic fields 二维量子电子固体在垂直磁场中的稳定性
arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-10 DOI: arxiv-2409.06686
M. Yu. Melnikov, D. G. Smirnov, A. A. Shashkin, S. -H. Huang, C. W. Liu, S. V. Kravchenko
{"title":"Stabilization of a two-dimensional quantum electron solid in perpendicular magnetic fields","authors":"M. Yu. Melnikov, D. G. Smirnov, A. A. Shashkin, S. -H. Huang, C. W. Liu, S. V. Kravchenko","doi":"arxiv-2409.06686","DOIUrl":"https://doi.org/arxiv-2409.06686","url":null,"abstract":"We find that the double-threshold voltage-current characteristics in the\u0000insulating regime in the ultra-clean two-valley two-dimensional electron system\u0000in SiGe/Si/SiGe quantum wells are promoted by perpendicular magnetic fields,\u0000persisting to an order of magnitude lower voltages and considerably higher\u0000electron densities compared to the zero-field case. This observation indicates\u0000the perpendicular-magnetic-field stabilization of the quantum electron solid.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180426","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
Measuring the ultrafast screening of $U$ in photo-excited charge-transfer insulators with time-resolved X-ray absorption spectroscopy 利用时间分辨 X 射线吸收光谱测量光激发电荷转移绝缘体中 $U$ 的超快筛选
arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-10 DOI: arxiv-2409.06314
Denis Golez, Eva Paprotzki, Philipp Werner, Martin Eckstein
{"title":"Measuring the ultrafast screening of $U$ in photo-excited charge-transfer insulators with time-resolved X-ray absorption spectroscopy","authors":"Denis Golez, Eva Paprotzki, Philipp Werner, Martin Eckstein","doi":"arxiv-2409.06314","DOIUrl":"https://doi.org/arxiv-2409.06314","url":null,"abstract":"Recent seminal experiments have utilized time-resolved X-ray absorption\u0000spectroscopy (XAS) to investigate the ultrafast photo-induced renormalization\u0000of the electron interaction (''Hubbard $U$'') in Mott and charge transfer\u0000insulators. In this paper, we analyze the change of interactions due to\u0000dynamical screening as it is encoded in the XAS signal, using the\u0000non-equilibrium GW+EDMFT formalism. Our study shows that XAS is well-suited for\u0000measuring this change, but two aspects should be kept in mind if the screening\u0000processes are not substantially faster than the valence electron dynamics: (i)\u0000Screening in a photo-excited system can affect both the position and the\u0000lineshape of the absorption lines. (ii) In general, the effect cannot be\u0000captured by the modification of a single interaction parameter. Specifically,\u0000an estimate for $Delta U$ extracted from the shift of the XAS lines does not\u0000necessarily describe the related shift of the the upper Hubbard band. We\u0000clarify these aspects using a minimal cluster model and the three-band Emery\u0000model for a charge transfer insulator.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"112 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180459","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
Wavefunction approach to the fractional anomalous Hall crystal 分数反常霍尔晶体的波函数方法
arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-10 DOI: arxiv-2409.06775
Tixuan Tan, Julian May-Mann, Trithep Devakul
{"title":"Wavefunction approach to the fractional anomalous Hall crystal","authors":"Tixuan Tan, Julian May-Mann, Trithep Devakul","doi":"arxiv-2409.06775","DOIUrl":"https://doi.org/arxiv-2409.06775","url":null,"abstract":"We propose fractional anomalous Hall crystals (FAHCs) as possible ground\u0000states of strongly interacting electrons in parent bands with Berry curvature.\u0000FAHCs are exotic states of matter that spontaneously break continuous\u0000translation symmetry to form a fractional Chern insulator. We construct a\u0000unified family of variational wavefunctions that describe FAHCs and their\u0000competing states in the presence of uniform parent Berry curvature. We\u0000calculate their variational energy with Coulomb interactions semi-analytically\u0000in the thermodynamic limit. Our analysis reveals that FAHCs can be\u0000energetically favorable over both Wigner crystals and integer anomalous Hall\u0000crystals for sufficiently strong interactions or flat dispersion.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180423","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
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