Harmonic disturbance on the topological phases of a Chern insulator

  • Dean Von Johari Casilana Narag National Institute of Physics, University of the Philippines Diliman
  • Cristine Villagonzalo National Institute of Physics, University of the Philippines Diliman

Abstract

We demonstrate the effect of a harmonic oscillator perturbing potential on the topological phases of a Chern insulator formed from a square lattice with two quantum states per site. For a region with a non-trivial topological phase characterized by a non-zero Chern number, the perturbation introduced an energy gap closing and divided the non-trivial region into three, which possessed a topologically trivial region and two non-trivial regions. The perturbation induced singularities on the Berry curvature which led to the division of the original topologically non-trivial region.

Published
2018-05-24
How to Cite
[1]
D. V. J. Narag and C. Villagonzalo. Harmonic disturbance on the topological phases of a Chern insulator, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PB-24 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PB-24.
Section
Poster Session B (Complex Systems, Simulations, and Theoretical Physics)