Personal Information
- (Professor)
Gender:
MaleDiscipline:
Acoustics. Optics. Condensed Matter PhysicsEducation Level:
With Certificate of Graduation for Doctorate StudyDiscipline:
1 Acoustics;
1 Optics;
1 Condensed Matter Physics
Other Contact Information
-
ZipCode
430072 -
PostalAddress
School of Physics and Technology, D303 -
email
phmxiao@whu.edu.cn
Publications
Current position: English > Research > Publications
Characterization of higher-order topological superconductors using Bott indices
- Time:2026-03-16
- Hits:
-
Journal:
Physical Review B -
Abstract:
The abundance of bulk and boundary topologies in higher-order topological phases offers remarkable tunability and diversity to boundary states but also poses a challenge to their unified topological characterization. In this work, we propose a theoretical framework to characterize time-reversal invariant topological superconductors hosting Majorana Kramers pairs (MKP) of corner states by using a series of spin Bott indices, which capture both bulk and boundary states' topology. The developed invariants can characterize MKP in arbitrarily shaped systems and all distinct spatial distribution patterns of MKP. As an illustrative example, we apply our theory to analyze the Kane-Mele model with sublattice-dependent superconducting pairing potentials. In this representative model, both intrinsic and extrinsic higher-order topological superconductors can be realized and various patterns of MKP can be engineered through edge cleavage. Despite their high sensitivity to boundary terminations, MKP can be faithfully characterized by the proposed topological invariants. We further demonstrate the characterization of higher-order topological superconductors in the BDI symmetry class using Bott indices without resolving the spin degree of freedom. -
Volume:
111 -
Issue:
18 -
Page Number:
184516 -
Translation or Not:
no -
Date of Publication:
2025-05-01