125 citations · 598 across the 14 of their papers we have counts for
14 papers
Superconductivity in lightly doped Hubbard model on honeycomb lattice
Cheng Peng, D. N. Sheng, Hong-Chen Jiang
We have performed large-scale density-matrix renormalization group studies of the lightly doped Hubbard model on the honeycomb lattice on long three and four-leg cylinders. We find…
Characterizing Random-singlet State in Two-dimensional Frustrated Quantum Magnets and Implications for the Double Perovskite SrCuTeWO
Huan-Da Ren, Tian-Yu Xiong, Han-Qing Wu +2
Motivated by experimental observation of the non-magnetic phase in the compounds with frustration and disorder, we study the ground state of the spin- square-lattice Heisenber…
Interaction driven quantum phase transition in fractional quantum spin Hall effects
Wei Li, D. N. Sheng, C. S. Ting +1
By means of finite size exact diagonalization we theoretically study the electronic many-body effects on the nearly flat-band structure with time-reversal symmetry in a checkerboar…
Non-Abelian Quantum Hall Effect in Topological Flat Bands
Yi-Fei Wang, Hong Yao, Zheng-Cheng Gu +2
Inspired by recent theoretical discovery of robust fractional topological phases without a magnetic field, we search for the non-Abelian quantum Hall effect (NA-QHE) in lattice mod…
Spectral function of the electron in a superconducting RVB state
V. N. Muthukumar, Z. Y. Weng, D. N. Sheng
We present a model calculation of the spectral function of an electron in a superconducting resonating valence bond (RVB) state. The RVB state, described by the phase-string mean f…
Spin-charge separation in the single hole doped Mott antiferromagnet
Z. Y. Weng, V. N. Muthukumar, D. N. Sheng +1
The motion of a single hole in a Mott antiferromagnet is investigated based on the t-J model. An exact expression of the energy spectrum is obtained, in which the irreparable phase…
Quasiparticle Localization in Disordered d-Wave Superconductors
Jian-Xin Zhu, D. N. Sheng, C. S. Ting
An extensive numerical study is reported on disorder effect in two-dimensional d-wave superconductors with random impurities in the unitary limit. It is found that a sharp resonant…
Phase Diagram of Integer Quantum Hall Effect
D. N. Sheng, Z. Y. Weng
The phase diagram of integer quantum Hall effect is numerically determined in the tight-binding model, which can account for overall features of recently obtained experimental phas…
Reflection Symmetry and Quantized Hall Resistivity near Quantum Hall Transition
D. N. Sheng, Z. Y. Weng
We present a direct numerical evidence for reflection symmetry of longitudinal resistivity and quantized Hall resistivity near the transition between quantu…
New universality of metal-insulator transition in integer quantum Hall effect system
D. N. Sheng, Z. Y. Weng
A new universality of metal-insulator transition in integer quantum Hall effect (IQHE) system is studied based on a lattice model, where the IQHE states only exist within a finite…
Phase String Effect in the t-J Model: General Theory
Z. Y. Weng, D. N. Sheng, Y. -C. Chen +1
We reexamine the problem of a hole moving in an antiferromagnetic spin background and find that the injected hole will always pick up a sequence of nontrivial phases from the spin…
A topological characterization of delocalization in a spin-orbit coupling system
D. N. Sheng, Z. Y. Weng
We show that wavefunctions in a two-dimensional (2D) electron system with spin-orbit coupling can be characterized by a topological quantity--the Chern integer due to the existence…
Disappearance of integer quantum Hall effect
D. N. Sheng, Z. Y. Weng
The disappearance of integer quantum Hall effect (IQHE) at strong disorder and weak magnetic field is studied in a lattice model. A generic sequence by which the IQHE plateaus disa…
Delocalization of electrons in a Random Magnetic Field
D. N. Sheng, Z. Y. Weng
Delocalization problem for a two-dimensional non-interacting electron system is studied under a random magnetic field. With the presence of a random magnetic field, the Hall conduc…