A practical method to detect, analyze, and engineer higher order Van Hove singularities in multi-band Hamiltonians

A practical method is presented to detect, diagnose, and engineer higher order Van Hove singularities in multiband systems, with no restrictions on the number of bands or hopping terms. The method allows us to directly compute the Taylor expansion of the dispersion of any band at arbitrary points in...

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Bibliographic Details
Main Authors: Anirudh Chandrasekaran, Joseph Betouras
Format: Default Article
Published: 2023
Subjects:
fermi surface topological transition
Feynman–Hellmann theorem
multiband systems
tight binding
Van Hove singularities
Online Access:https://hdl.handle.net/2134/21990311.v1
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