137 citations · 1.3k across the 39 of their papers we have counts for
5 papers · 1 filter
Nonmonotonic plasmon dispersion in strongly interacting Coulomb Luttinger liquids
Yang-Zhi Chou, Sankar Das Sarma
We demonstrate that the plasmon in one-dimensional Coulomb interacting electron fluids can develop a finite-momentum maxon-roton-like nonmonotonic energy-momentum dispersion. Such…
Anomalous localization at the boundary of an interacting topological insulator
Itamar Kimchi, Yang-Zhi Chou, Rahul M. Nandkishore +1
The boundary of a topological insulator (TI) hosts an anomaly restricting its possible phases: e.g. 3D strong and weak TIs maintain surface conductivity at any disorder if symmetry…
Magic-Angle Semimetals with Chiral Symmetry
Yang-Zhi Chou, Yixing Fu, Justin H. Wilson +2
We construct and solve a two-dimensional, chirally symmetric model of Dirac cones subjected to a quasiperiodic modulation. In real space, this is realized with a quasiperiodic hopp…
Superconductor versus insulator in twisted bilayer graphene
Yang-Zhi Chou, Yu-Ping Lin, Sankar Das Sarma +1
We present a simple model that we believe captures the key aspects of the competition between superconducting and insulating states in twisted bilayer graphene. Within this model,…
Localized surfaces of three dimensional topological insulators
Yang-Zhi Chou, Rahul M. Nandkishore, Leo Radzihovsky
We study the surface of a three-dimensional spin chiral topological insulator (class CII), demonstrating the possibility of its localization. This arises through an…