94 citations · 890 across the 35 of their papers we have counts for
8 papers · 1 filter
Witnessing quantum criticality and entanglement in the triangular antiferromagnet KYbSe
A. O. Scheie, E. A. Ghioldi, J. Xing +20
The Heisenberg triangular lattice quantum spin liquid and the phase transitions to nearby magnetic orders have received much theoretical attention, but clear experimental manifesta…
Schwinger boson theory of ordered magnets
Shang-Shun Zhang, E. A. Ghioldi, L. O. Manuel +2
The Schwinger boson theory provides a natural path for treating quantum spin systems with large quantum fluctuations. In contrast to semi-classical treatments, this theory allows u…
Interplay between superconductivity and non-Fermi liquid at a quantum-critical point in a metal. VI. The model and its phase diagram at
Shang-Shun Zhang, Yi-Ming Wu, Artem Abanov +1
In this paper, the sixth in series, we continue our analysis of the interplay between non-Fermi liquid and pairing in the effective low-energy model of fermions with singular dynam…
Instabilities of heavy magnons in an anisotropic magnet
Xiaojian Bai, Shang-Shun Zhang, Hao Zhang +5
The search for new elementary particles is one of the most basic pursuits in physics, spanning from subatomic physics to quantum materials. Magnons are the ubiquitous elementary qu…
Theory of the Kitaev model in a [111] magnetic field
Shang-Shun Zhang, Gábor B. Halász, Cristian D. Batista
Recent numerical studies indicate that the antiferromagnetic Kitaev honeycomb lattice model undergoes a magnetic-field-induced quantum phase transition into a new spin-liquid phase…
Exciton condensation in bilayer spin-orbit insulator
Hidemaro Suwa, Shang-Shun Zhang, Cristian D. Batista
We investigate the nature of the magnetic excitations of a bilayer single-orbital Hubbard model in the intermediate-coupling regime. This model exhibits a quantum phase transition…
Variational study of the Kitaev-Heisenberg-Gamma model
Shang-Shun Zhang, Gábor B. Halász, Wei Zhu +1
We compute the low-energy excitation spectrum and the dynamical spin structure factor of the Kitaev-Heisenberg-Gamma model through a variational approach based on the exact fractio…
Interplay between superconductivity and non-Fermi liquid at a quantum-critical point in a metal: V. The model and its phase diagram. The case
Yi-Ming Wu, Shang-Shun Zhang, Artem Abanov +1
This paper is a continuation and a partial summary of our analysis of the pairing at a quantum-critical point (QCP) in a metal for a set of quantum-critical systems, whose low-ener…