112 citations · 393 across the 13 of their papers we have counts for
9 papers · 1 filter
Spin pumping effect in non-Fermi liquid metals
Xiao-Tian Zhang, Yi-Hui Xing, Xu-Ping Yao +3
Spin pumping effect is a sensitive and well-established experimental method in two-dimensional (2D) magnetic materials. We propose that spin pumping effect can be a valuable probe…
Exact Solution to Haldane-BCS-Hubbard Model Along the Symmetric Lines: Interaction Induced Topological Phase Transition
Jian-Jian Miao, Dong-Hui Xu, Long Zhang +1
We propose a Haldane-BCS-Hubbard model on a honeycomb lattice, which is composed of two copies of the Haldane model of the quantum anomalous Hall effect, an equal-spin pairing term…
Monte Carlo Study of Lattice Compact Quantum Electrodynamics with Fermionic Matter: the Parent State of Quantum Phases
Xiao Yan Xu, Yang Qi, Long Zhang +3
The interplay between lattice gauge theories and fermionic matter accounts for fundamental physical phenomena ranging from the deconfinement of quarks in particle physics to quantu…
Possible Quantum Paraelectric State in Kitaev Spin Liquid Candidate HLiIrO
Shuai Wang, Long Zhang, Fa Wang
A new quantum spin liquid (QSL) candidate material HLiIrO was synthesized recently and was found not to show any magnetic order or phase transition down to low te…
Unconventional Surface Critical Behaviors Induced by Quantum Phase Transition from Two-Dimensional Affleck-Kennedy-Lieb-Tasaki Phase to Néel Order
Long Zhang, Fa Wang
A symmetry-protected topological phase has nontrivial surface states in the presence of certain symmetries, which can either be gapless or be degenerate. In this work, we study the…
Compass Impurity Model of Tb Substitution in Sr2IrO4
Long Zhang, Fa Wang, Dung-Hai Lee
We show that upon Tb substitution the interaction between the magnetic moments on the impurity Tb ion and its surrounding Ir ions is described by a "compass" model, i…
Quantum oscillation in narrow-gap topological insulators
Long Zhang, Xue-Yang Song, Fa Wang
The canonical understanding of quantum oscillation in metals is challenged by the observation of de Haas-van Alphen effect in an insulator, SmB [Tan \emph{et al}, Science {\b…
Quantum Oscillation as Diagnostics of Pseudogap State in Underdoped Cuprates
Long Zhang, Jia-Wei Mei
The Fermi surface in underdoped cuprates is reconstructed by the charge density wave (CDW) order in the pseudogap phase. Theoretical proposals can be divided into two classes: one…
Sign Structure, Electron Fractionalization, and Emergent Gauge Description of the Hubbard Model
Long Zhang, Zheng-Yu Weng
The Fermi sign structure plays a crucial role for a Landau's Fermi liquid. In this work, we identify the exact sign structure for the bipartite Hubbard model at an arbitrary streng…