Harmonic disturbance on the topological phases of a Chern insulator

Authors

  • 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.

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Published

2018-05-24

How to Cite

[1]
DVJC 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://proceedings.spp-online.org/article/view/SPP-2018-PB-24.

Issue

Section

Poster Session B (Complex Systems, Simulations, and Theoretical Physics)