192 citations · 1.4k across the 35 of their papers we have counts for
35 papers
Quantum spin liquid from electron-phonon coupling
Xun Cai, Zhaoyu Han, Zi-Xiang Li +2
A quantum spin liquid (QSL) is an exotic insulating phase with emergent gauge fields and fractionalized excitations. However, the unambiguous demonstration of the existence of a QS…
Theory of an infinitely anisotropic phase of a two-dimensional superconductor
Zi-Xiang Li, Steven A. Kivelson, Dung-Hai Lee
We propose a simple model of a two-dimensional ``locally smectic superconductor'' that exhibits power-law non-linear I-V characteristics with different powers for current applied i…
High-temperature superconductivity induced by the Su-Schrieffer-Heeger electron-phonon coupling
Xun Cai, Zi-Xiang Li, Hong Yao
Experimental quest for high-temperature and room-temperature superconductivity (SC) at ambient pressure has been a long-standing research theme in physics. It has also been desired…
Bogoliubov Quasiparticle on the Gossamer Fermi Surface in Electron-Doped Cuprates
Ke-Jun Xu, Qinda Guo, Makoto Hashimoto +14
In contrast to hole-doped cuprates, electron-doped cuprates consistently exhibit strong antiferromagnetic correlations with a commensurate (π, π) ordering wave vector, leading to t…
Emergent normal fluid in the superconducting ground state of overdoped cuprates
Shusen Ye, Miao Xu, Hongtao Yan +7
The microscopic mechanism for the disappearance of superconductivity in overdoped cuprates is still under heated debate. Here we use scanning tunneling spectroscopy to investigate…
Boosting quantum Monte Carlo and alleviating sign problem by Gutzwiller projection
Wei-Xuan Chang, Zi-Xiang Li
Here we develop a new scheme of projective quantum Monte-Carlo (QMC) simulation combining unbiased zero-temperature (projective) determinant QMC and variational Monte-Carlo based o…
Non-Hermitian strongly interacting Dirac fermions: a quantum Monte-Carlo study
Xue-Jia Yu, Zhiming Pan, Limei Xu +1
Exotic quantum phases and phase transition in the strongly interacting Dirac systems has attracted tremendous interests. On the other hand, non-Hermitian physics, usually associate…
Order-by-disorder and emergent Kosterlitz-Thouless phase in triangular Rydberg array
Sibo Guo, Jiangping Hu, Zi-Xiang Li
Programmable quantum simulator using Rydberg-atom array provides a promising route to demystifying quantum many-body physics in strongly correlated systems. Motivated by recent rea…
Emergence of Competing Orders and Possible Quantum Spin Liquid in SU(N) Fermions
Xue-Jia Yu, Shao-Hang Shi, Limei Xu +1
In the past decades, tremendous efforts have been made towards understanding the exotic physics emerging from competition between various ordering tendencies in strongly correlated…
Asymptotic sign free in interacting fermion models
Zi-Xiang Li, Zhou-Quan Wan, Hong Yao
As an intrinsically-unbiased approach, quantum Monte Carlo (QMC) is of vital importance in understanding correlated phases of matter. Unfortunately, it often suffers notorious sign…
Robustness of Antiferromagnetism in the Su-Schrieffer-Heeger-Hubbard model
Xun Cai, Zi-Xiang Li, Hong Yao
We recently unveiled that antiferromagnetism (AFM) order can be dominantly induced by the bond Su-Schrieffer-Heeger (SSH) electron-phonon coupling (EPC), which is beyond the conven…
Antiferromagnetism induced by electron-phonon-coupling
Xun Cai, Zi-Xiang Li, Hong Yao
Antiferromagnetism (AF) such as Neel ordering is often closely related to Coulomb interactions such as Hubbard repulsion in two-dimensional (2D) systems. Whether Neel AF ordering i…
Superconductor to metal transition in overdoped cuprates
Zi-Xiang Li, Steven A. Kivelson, Dung-Hai Lee
We present a theoretical framework for understanding the behavior of the normal and superconducting states of overdoped cuprate high temperature superconductors in the vicinity of…
Superconducting fluctuations in overdoped BiSrCaCuO
Yu He, Su-Di Chen, Zi-Xiang Li +13
Fluctuating superconductivity - vestigial Cooper pairing in the resistive state of a material - is usually associated with low dimensionality, strong disorder or low carrier densit…
Fermion-induced quantum critical point in Dirac semimetals: a sign-problem-free quantum Monte Carlo study
Bo-Hai Li, Zi-Xiang Li, Hong Yao
According to Landau criterion, a phase transition should be first order when cubic terms of order parameters are allowed in its effective Ginzburg-Landau free energy. Recently, it…
The thermal Hall conductance of two doped symmetry-breaking topological insulators
Zi-Xiang Li, Dung-Hai Lee
In this paper we study two models of symmetry-breaking topological insulators. They are the variants of the d-density wave Hamiltonian proposed by Chakravarty, Laughlin, Morr and N…
Deconfined quantum criticality and emergent SO(5) symmetry in fermionic systems
Zi-Xiang Li, Shao-Kai Jian, Hong Yao
Deconfined quantum criticality with emergent SO(5) symmetry in correlated systems remains elusive. Here, by performing numerically-exact state-of-the-art quantum Monte Carlo (QMC)…
Disorder induced multifractal superconductivity in monolayer niobium dichalcogenides
Kun Zhao, Haicheng Lin, Xiao Xiao +17
The interplay between disorder and superconductivity is a subtle and fascinating phenomenon in quantum many body physics. The conventional superconductors are insensitive to dilute…
Superconductivity in the presence of strong electron-phonon interactions and frustrated charge order
Zi-Xiang Li, Marvin L. Cohen, Dung-Hai Lee
We study the superconductivity of strongly coupled electron-phonon systems where the geometry of the lattice frustrates the charge order by the sign-problem-free Quantum Monte Carl…
Electronic and phononic properties of a two dimensional electron gas coupled to dipolar phonons via small-momentum-transfer scattering
Zi-Xiang Li, T. P. Devereaux, Dung-Hai Lee
We study the electron and phonon spectral functions as well as superconductivity for a two dimensional electron gas couped to dipolar phonons via small-momentum transfer scattering…
Does the existence of Majorana zero mode in superconducting vortices imply the superconductivity is topologically non-trivial?
Lokman Tsui, Zi-Xiang Li, Yen-Ta Huang +2
We show that the presence of Majorana zero modes (2D), and chiral-dispersing Majorana modes (3D), in the vortex cores of superconductors are neither sufficient nor necessary condit…
Sign-Problem-Free Fermionic Quantum Monte Carlo: Developments and Applications
Zi-Xiang Li, Hong Yao
Reliable simulations of correlated quantum systems, including high-temperature superconductors and frustrated magnets, are increasingly desired nowadays to further understanding of…
Observation of Emergent Spacetime Supersymmetry at Superconducting Quantum Criticality
Zi-Xiang Li, Abolhassan Vaezi, Christian B. Mendl +1
No definitive evidence of spacetime supersymmetry (SUSY) that transmutes fermions into bosons and vice versa has been revealed in nature so far. Moreover, whether spacetime SUSY in…
Edge stability and edge quantum criticality in 2D interacting topological insulators
Zi-Xiang Li, Hong Yao
Robustness of helical edge states in 2D topological insulators (TI) against strong interactions remains an intriguing issue. Here, by performing the first sign-free quantum Monte C…