Indexed by: Journal paper

First Author: Jinyu Zou

Correspondence Author: Gang Xu

Co-author: Zhuoran He

Journal: Physical Review B

Included Journals: SCI

Discipline: Science

First-Level Discipline: Physics

Document Type: J

Volume: 100

Issue: 23

Page Number: 235137

ISSN No.: 1098-0121

Date of Publication: 2019-12-23

Impact Factor: 3.575

Abstract: We present a 4′/m′-respecting crisscross AFM model in two dimensions (2D) and three dimensions (3D), both belonging to the Z2 classification and exhibiting interesting magnetic high-order topological insulating (HOTI) phases. The topologically nontrivial phase in the 2D model is characterized by the fractional charge localized around the corners and the quantized charge quadrupole moment. Moreover, our 2D model also exhibits the quantized magnetic quadrupole moment, which is a unique feature compared with previous studies. The 3D system stacked from layers of the 2D model possesses the HOTI phase holding chiral one-dimensional (1D) metallic states on the hinge, which corresponds to the Wannier center flow between the valence and conduction bands. The novel transport properties such as the half-quantum spin-flop pumping phenomena on the side surfaces of the HOTI phase are also discussed.

Links to published journals: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.100.235137