662 citations · 3.7k across the 108 of their papers we have counts for
69 papers · 1 filter
Hourglass-Like Spin Excitation in a Doped Mott Insulator
Jia-Xin Zhang, Chuan Chen, Jian-Hao Zhang +1
We examine the dynamical magnetic response in a two-component resonating-valence-bond (RVB) description of the doped Mott insulator. The half-filled antiferromagnetic phase describ…
Hubbard Model on Triangular Lattice: Role of Charge Fluctuations
Ji-Si Xu, Zheng Zhu, Kai Wu +1
A chiral spin liquid (CSL) phase has been recently reported in the Hubbard model on a triangular lattice at half-filling. It emerges in an intermediate coupling regime, which is sa…
Sign structure of the -- model and its physical consequences
Xin Lu, Jia-Xin Zhang, Shou-Shu Gong +2
Understanding the doped Mott insulator is a central challenge in condensed matter physics. In this work, we first explicitly identify a new sign structure in the -- model…
Pair density wave characterized by a hidden string order parameter
Hao-Kai Zhang, Rong-Yang Sun, Zheng-Yu Weng
A composite pairing structure of superconducting state is revealed by density matrix renormalization group study in a two-leg - model. The pairing order parameter is composed…
Continuous transition from a Landau quasiparticle to a neutral spinon
Jing-Yu Zhao, Shuai A. Chen, Rong-Yang Sun +1
We examine a wavefunction ansatz in which a doped hole can experience a quantum transition from a charge Landau quasiparticle to a neutral spinon as a function of the underlyi…
Crossover from Fermi Arc to Full Fermi Surface
Jia-Xin Zhang, Zheng-Yu Weng
The Fermi surface as a contour of the gapless quasiparticle excitation in momentum space is studied based on a mean-field theory of the doped Mott insulator, where the underlying p…
Mottness, Phase String, and High- Superconductivity
Jing-Yu Zhao, Zheng-Yu Weng
It is a great discovery in physics of the twentieth century that the elementary particles in Nature are dictated by gauge forces, characterized by a nonintegrable phase factor that…
Spin Texture in Doped Mott Insulators with Spin-Orbit Coupling
Shuai A. Chen, Zheng-Yu Weng, Jan Zaanen
A hole injected into a Mott insulator will gain an internal structure as recently identified by exact numerics, which is characterized by a nontrivial quantum number whose nature i…
Two-Hole Ground State: Dichotomy in Pairing Symmetry
Jing-Yu Zhao, Shuai A. Chen, Hao-Kai Zhang +1
A single-hole ground state Ansatz for the two-dimensional t-J model has been recently studied by the variational Monte Carlo (VMC) method. Such a doped hole behaves like a "twisted…
Complex Phase Diagram of Doped XXZ Ladder: Localization and Pairing
Rong-Yang Sun, Zheng Zhu, Zheng-Yu Weng
How the ground state nature can be dramatically changed by the distinct underlying spin correlation is a central issue of doped Mott insulators. The two-leg XXZ ladder provides a p…
Magnetic Field Induced Spin Liquids in S=1 Kitaev Honeycomb Model
Zheng Zhu, Zheng-Yu Weng, D. N. Sheng
We investigate the ground state properties of the spin S=1 Kitaev honeycomb model under a magnetic field based on the density matrix renormalization group (DMRG) calculation. With…
Critical role of the sign structure in the doped Mott insulator: Superconductivity vs. Fermi liquid
Hong-Chen Jiang, Shuai Chen, Zheng-Yu Weng
Mechanism of superconductivity (SC) in a purely interacting electron system has been one of the most challenging issues in condensed matter physics. In the BCS theory, the Landau's…
Quantum entanglement in the t-J chain: From charge-spin separation to recombination
Wayne Zheng, Zheng-Yu Weng
In contrast to the conventional von Neumann bipartite entanglement entropy (bEE), we show that a more appropriate description of the one-dimensional doped Mott insulator is a new k…
Phenomenological Single-Particle Green's Function for the Pseudogap and Superconducting Phases of High-T Cuprates
Jian-Hao Zhang, Sen Li, Yao Ma +3
We present a phenomenological Green's function to characterize the superconducting and pseudogap phases of the cuprates based on a microscopic theory of doped Mott insulators. In t…
Single-hole wave function in two dimensions: A case study of the doped Mott insulator
Shuai Chen, Qing-Rui Wang, Yang Qi +2
We study a ground-state ansatz for the single-hole doped - model in two dimensions via a variational Monte Carlo (VMC) method. Such a single-hole wave function possesses fini…
Localization in a - type ladder with translational symmetry
Rong-Yang Sun, Zheng Zhu, Zheng-Yu Weng
An explicit localization of a hole is shown in a two-leg - ladder in the presence of a staggered chemical potential, which still retains a translational sy…
Two-hole ground state wavefunction: Non-BCS pairing in a - two-leg ladder system
Shuai Chen, Zheng Zhu, Zheng-Yu Weng
Superconductivity is usually described in the framework of the Bardeen-Cooper-Schrieffer (BCS) wavefunction, which even includes the resonating-valence-bond (RVB) wavefunction prop…
Superconductivity in the doped - model: results for four-leg cylinders
Hong-Chen Jiang, Zheng-Yu Weng, Steven A. Kivelson
We report a density-matrix renormalization group study of the lightly doped - model on a 4-leg cylinder with doped hole concentrations per site . By keeping…
Hidden spin current in doped Mott antiferromagnets
Wayne Zheng, Zheng Zhu, D. N. Sheng +1
We investigate the nature of doped Mott insulators using exact diagonalization and density matrix renormalization group methods. Persistent spin currents are revealed in the ground…
Intrinsic translational symmetry breaking in a doped Mott insulator
Zheng Zhu, D. N. Sheng, Zheng-Yu Weng
A central issue of Mott physics, with symmetries being fully retained in the spin background, concerns the charge excitation. In a two-leg spin ladder with spin gap, an injected ho…
Pairing versus phase coherence of doped holes in distinct quantum spin backgrounds
Zheng Zhu, D. N. Sheng, Zheng-Yu Weng
We examine the pairing structure of holes injected into two \emph{distinct} spin backgrounds: a short-range antiferromagnetic phase versus a symmetry protected topological phase. B…
Charge-spin mutual entanglement: A case study by exact diagonalization of the one hole doped - loop
Wayne Zheng, Zheng-Yu Weng
A doped Mott insulator exhibits peculiar properties associated with its singular sign structure. As a case study, we investigate the ground state and excitations of finite-size Hei…
Relationship between the parent charge transfer gap and maximum transition temperature in cuprates
Wei Ruan, Cheng Hu, Jianfa Zhao +10
One of the biggest puzzles concerning the cuprate high temperature superconductors is what determines the maximum transition temperature (Tc,max), which varies from less than 30 K…
Breakdown of the Bloch-wave behavior for a single hole in a gapped antiferromagnet
Zheng Zhu, D. N. Sheng, Zheng-Yu Weng
Whether a doped hole propagates as a Bloch wave or not is an important issue of doped Mott physics. Here we examine this problem based on the quasiparticle spectral weight dist…