723 citations · 3k across the 43 of their papers we have counts for
9 papers · 1 filter
Strong pairing from small Fermi surface beyond weak coupling: Application to LaNiO
Hui Yang, Hanbit Oh, Ya-Hui Zhang
The studies of high-temperature superconductors raise a fundamental question: Can a small Fermi surface phase, which violates the Luttinger theorem, exist and give rise to supercon…
S-wave pairing in a two-orbital t-J model on triangular lattice: possible application to PbCu(PO)O
Hanbit Oh, Ya-Hui Zhang
Recently room temperature superconductor was claimed in PbCu(PO)O (also known as LK-99) with . Density functional theory (DFT) calculations sug…
Ancilla wavefunctions of Mott insulator and pseudogap metal through quantum teleportation
Boran Zhou, Ya-Hui Zhang
Weak Mott regime with finite U is a wonderful region to search for quantum spin liquid, but it is challenging to write down a wavefunction capturing both spin liquid and charge flu…
Type II t-J model and shared antiferromagnetic spin coupling from Hund's rule in superconducting LaNiO
Hanbit Oh, Ya-Hui Zhang
Recently, a 80 K superconductor was discovered in LaNiO under high pressure. Density function theory (DFT) calculations identify , as the active…
Numerical signatures of ultra-local criticality in a one dimensional Kondo lattice model
Alexander Nikolaenko, Ya-Hui Zhang
Heavy fermion criticality has been a long-standing problem in condensed matter physics. Here we study a one-dimensional Kondo lattice model through numerical simulation and observe…
Exciton and light induced ferromagnetism from doping a moiré Mott insulator
Hui Yang, Ya-Hui Zhang
Significant efforts have been dedicated to achieving excitonic insulators. In this paper, we explore a new problem of doping excitons into a Mott insulator instead of a band insula…
XY* transition and extraordinary boundary criticality from fractional exciton condensation in quantum Hall bilayer
Ya-Hui Zhang, Zheng Zhu, Ashvin Vishwanath
XY* transitions represent one of the simplest examples of unconventional quantum criticality, in which fractionally charged excitations condense into a superfluid, and display nove…
Approximate SU(4) spin models on triangular and honeycomb lattices in twisted AB-Stacked WSe homo-bilayer
Shuchen Zhang, Boran Zhou, Ya-Hui Zhang
In this paper, we derive lattice models for the narrow moiré bands of the AB-stacked twisted WSe homobilayer through continuum model and Wannier orbital construction. Previous…
A model of -wave superconductivity, antiferromagnetism, and charge order on the square lattice
Maine Christos, Zhu-Xi Luo, Henry Shackleton +3
Early studies proposed a connection between cuprate superconductivity and fractionalized spin liquid states. But the low temperature phase diagram is dominated by states without fr…