arXiv - PHYS - Strongly Correlated Electrons最新文献_第5页

Frequency-selective amplification of nonlinear response in strongly correlated bosons 强相关玻色子非线性响应的频率选择性放大

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-12 DOI: arxiv-2409.08168

Aditya Prakash, Debamalya Dutta, Arko Roy, Kush Saha

引用次数: 0

Quantum metric induced hole dispersion and emergent particle-hole symmetry in topological flat bands 拓扑平坦带中的量子度量诱导空穴色散和新兴粒子-空穴对称性

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-12 DOI: arxiv-2409.08324

Guangyue Ji, Bo Yang

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Persistent quantum vibronic dynamics in a $5d^1$ double perovskite oxide 5d^1$ 双过氧化物中的持久量子振动动力学

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-12 DOI: arxiv-2409.08095

Naoya Iwahara, Jian-Rui Soh, Daigorou Hirai, Ivica Živković, Yuan Wei, Wenliang Zhang, Carlos Galdino, Tianlun Yu, Kenji Ishii, Federico Pisani, Oleg Malanyuk, Thorsten Schmitt, Henrik M Rønnow

引用次数: 0

Orbital inversion and emergent lattice dynamics in infinite layer CaCoO$_2$ 无限层 CaCoO$_2$ 中的轨道反转和新兴晶格动力学

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-12 DOI: arxiv-2409.07705

Daniel Jost, Eder G. Lomeli, Woo Jin Kim, Emily M. Been, Matteo Rossi, Stefano Agrestini, Kejin Zhou, Chunjing Jia, Brian Moritz, Zhi-Xun Shen, Harold Y. Hwang, Thomas P. Devereaux, Wei-Sheng Lee

引用次数: 0

Fusion of Low-Entanglement Excitations in 2D Toric Code 二维环形编码中的低纠缠激励融合

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-11 DOI: arxiv-2409.07544

Jing-Yu Zhao, Xie Chen

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Cascade of strongly correlated quantum states in a partially filled kagome flat band 部分填充的神户平带中的强相关量子态级联

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-11 DOI: arxiv-2409.06933

Caiyun Chen, Jiangchang Zheng, Yuman He, Xuzhe Ying, Soumya Sankar, Luanjing Li, Yizhou Wei, Xi Dai, Hoi Chun Po, Berthold Jäck

{"title":"Cascade of strongly correlated quantum states in a partially filled kagome flat band","authors":"Caiyun Chen, Jiangchang Zheng, Yuman He, Xuzhe Ying, Soumya Sankar, Luanjing Li, Yizhou Wei, Xi Dai, Hoi Chun Po, Berthold Jäck","doi":"arxiv-2409.06933","DOIUrl":"https://doi.org/arxiv-2409.06933","url":null,"abstract":"Coulomb interactions among charge carriers that occupy an electronic flat\u0000band have a profound impact on the macroscopic properties of materials. At\u0000sufficient strength, these interactions can give rise to captivating phenomena\u0000such as quantum criticality, Mott-Hubbard states, and unconventional\u0000superconductivity. The appearance of these characteristics sensitively depends\u0000on the number of electrons occupying the flat band states. In this work, we\u0000present experimental evidence obtained from scanning tunneling microscopy\u0000measurements for a cascade of strongly correlated states appearing in the\u0000partially occupied kagome flat bands of Co$_{1-x}$Fe$_x$Sn whose filling can be\u0000controlled by the Fe-doping level $x$. At elevated temperatures ($Tgeq16,K$),\u0000we detect a nematic electronic state across a broad doping range $0.05<x<0.25$.\u0000The comparison with model calculations reveals that strong Coulomb interactions\u0000($U>100,$meV) blend the states of two $3d$-orbital derived flat bands and\u0000impart a nematic order parameter. This state serves as the parent phase of a\u0000strongly correlated phase diagram: At lower temperatures $T<16,$K, we find\u0000spectroscopic evidence for an orbital-selective Mott state enabled by the\u0000$3d$-orbital degeneracy of the Co atom. This state can only be detected in\u0000samples with ideal Fe doping ($x=0.17$) and descends into pseudogap phases upon\u0000electron and hole doping. At $T<8,$K, the pseudogap phase evolves into another\u0000nematic low temperature state. Our observations demonstrate that the electronic\u0000ground state of a kagome flat band depends on the complex interplay between\u0000strong Coulomb repulsion, $3d$-orbital degeneracy, and flat band filling\u0000fraction at different temperatures.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180422","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

Low-energy critical behavior in two-dimensional tilted semi-Dirac semimetals driven by fermion-fermion interactions 费米子-费米子相互作用驱动的二维倾斜半狄拉克半金属中的低能临界行为

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-11 DOI: arxiv-2409.07126

Wen Liu, Wen-Hao Bian, Xiao-Zhuo Chu, Jing Wang

{"title":"Low-energy critical behavior in two-dimensional tilted semi-Dirac semimetals driven by fermion-fermion interactions","authors":"Wen Liu, Wen-Hao Bian, Xiao-Zhuo Chu, Jing Wang","doi":"arxiv-2409.07126","DOIUrl":"https://doi.org/arxiv-2409.07126","url":null,"abstract":"Employing the renormalization group approach, we carefully investigate the\u0000critical behavior of two-dimensional tilted semi-Dirac semimetals induced by\u0000the fermion-fermion interactions in the low-energy regime. After incorporating\u0000all one-loop corrections, we derive the coupled RG equations of all related\u0000parameters and introduce two distinct strategies, named as Strategy I and\u0000Strategy II, to describe different scenarios. A detailed numerical analysis\u0000yields several interesting behavior in the low-energy limit. At first, we\u0000notice that the fermion-fermion interactions either vanish or diverge in the\u0000Strategy I, depending on the initial values of the tilting parameter and the\u0000fermionic couplings, whereas these interactions in the Strategy II always\u0000diverge at a certain critical energy scale, which is associated with the\u0000initial conditions. Next, the microstructural parameter $alpha$ and the\u0000fermion velocity $v_F$ in the Strategy I share the similar behavior with their\u0000Strategy II counterparts. It is observed that fermion-fermion interactions lead\u0000to an increase in $alpha$ while driving a decrease in $v_F$. Furthermore, the\u0000system can either be attracted by the Gaussian fixed point (GFP) or certain\u0000relatively fixed point (RFP) in the Strategy I. However, it always flow towards\u0000the RFP in the Strategy II at the lowest-energy limit. These results would\u0000provide helpful insights into the studies on observable quantities and phase\u0000transitions in the two-dimensional tilted semi-Dirac semimetals and the\u0000analogous semimetals.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180420","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

Nernst Plateau in the Quantum Limit of Topological Insulators 拓扑绝缘体量子极限中的奈恩斯特高原

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-11 DOI: arxiv-2409.07199

Peng-Lu Zhao, J. L. Zhang, Hai-Zhou Lu, Qian Niu

引用次数: 0

Incipient quantum spin Hall insulator under strong correlations 强关联下的初生量子自旋霍尔绝缘体

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-11 DOI: arxiv-2409.07557

Peizhi Mai, Jinchao Zhao, Philip W. Phillips

{"title":"Incipient quantum spin Hall insulator under strong correlations","authors":"Peizhi Mai, Jinchao Zhao, Philip W. Phillips","doi":"arxiv-2409.07557","DOIUrl":"https://doi.org/arxiv-2409.07557","url":null,"abstract":"To assess prior mean-field studies that the interacting Kane-Mele model\u0000supports a novel antiferromagnetic Chern insulating phase (AFCI) for a wide\u0000range of sublattice potentials, we analyze the Kane-Mele-Hubbard model in the\u0000presence of a sublattice potential using determinant quantum Monte Carlo\u0000(DQMC). Instead of an AFCI, we find that the ground state is a quantum spin\u0000Hall (QSH) insulator for intermediate values of the sublattice potential\u0000$lambda_v$, albeit with a small gap. The QSH state gives way to a trivial band\u0000insulator as the sublattice potential increases beyond a critical value. Only\u0000at small sublattice potentials does the QSH state transition into a trivial\u0000Mott insulator with xy antiferromagnetic correlations. The QAH feature is only\u0000observed at high temperature. The QAH feature crosses over to an incipient QSH\u0000state when the topological gap stabilizes. Our work is consistent with the\u0000experimental observation that in twisted bilayer MoTe$_2$ and WSe$_2$ as well\u0000as AB stacked MoTe$_2$/WSe$_2$, where QSH is consistently observed at\u0000even-integer filling over a wide range of parameters.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180419","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

Variational wavefunction for Mott insulator at finite $U$ using ancilla qubits 利用安吉拉量子比特计算有限 U$ 时莫特绝缘体的变分波函数

arXiv - PHYS - Strongly Correlated Electrons Pub Date : 2024-09-11 DOI: arxiv-2409.07512

Boran Zhou, Hui-Ke Jin, Ya-Hui Zhang

{"title":"Variational wavefunction for Mott insulator at finite $U$ using ancilla qubits","authors":"Boran Zhou, Hui-Ke Jin, Ya-Hui Zhang","doi":"arxiv-2409.07512","DOIUrl":"https://doi.org/arxiv-2409.07512","url":null,"abstract":"The Mott regime with finite $U$ offers a promising platform for exploring\u0000novel phases of matter, such as quantum spin liquids (QSL) that exhibit\u0000fractionalization and emergent gauge field. Here, we provide a new class\u0000wavefunction, dubbed ancilla wavefunction, to capture both charge and spin\u0000(gauge) fluctuations in QSLs at finite $U$. The ancilla wavefunction can unify\u0000the Fermi liquid and Mott insulator phases with a single variation parameter\u0000$Phi$ tuning the charge gap. As $Phi rightarrowinfty$, the wavefunction\u0000reduces to the Gutzwiller projected state, while at $Phi=U/2$, it is\u0000effectively equivalent to applying an inverse Schrieffer-Wolff transformation\u0000to the Gutzwiller projected state. This wavefunction can be numerically\u0000simulated in the matrix product state representation, and its performance is\u0000supported by numerical results for both one- and two-dimensional Hubbard\u0000models. Besides, we propose the possibility of a narrow regime of fractional\u0000Fermi liquid phase between the usual Fermi liquid and the Mott insulator phases\u0000close to the metal insulator transition -- a scenario typically overlooked by\u0000the conventional slave rotor theory. Our ancilla wavefunction offers a novel\u0000conceptual framework and a powerful numerical tool for understanding Mott\u0000physics.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180421","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