Non-Hermitian topology in molecules: Prediction of fractional quantum number
Chemical Physics
2020-10-06 v1 Mesoscale and Nanoscale Physics
Abstract
We give a simple toy model to study a famous Jahn-Teller type molecule. Finite lifetime due to non-adiabatic coupling and finite temperature effect results in the effective Hamiltonian to be non-Hermitian. This effect pulls a conical intersection into a pair of connected Weyl points, bridged by a Fermi arc. The length of the Fermi arc depends on the strength of non-hermicity. This is a unique feature of non-Hermitian topology with no Hermitian analogue. We predict the existence of Weyl points in molecules which cause anomalous Jahn-Teller effects and fractional quantum number.
Keywords
Cite
@article{arxiv.2010.01445,
title = {Non-Hermitian topology in molecules: Prediction of fractional quantum number},
author = {J. Li},
journal= {arXiv preprint arXiv:2010.01445},
year = {2020}
}