Self-isospectrality, special supersymmetry, and their effect on the band structure
Abstract
We study a planar model of a non-relativistic electron in periodic magnetic and electric fields that produce a 1D crystal for two spin components separated by a half-period spacing. We fit the fields to create a self-isospectral pair of finite-gap associated Lame equations shifted for a half-period, and show that the system obtained is characterized by a new type of supersymmetry. It is a special nonlinear supersymmetry generated by three commuting integrals of motion, related to the parity-odd operator of the associated Lax pair, that coherently reflects the band structure and all its peculiarities. In the infinite period limit it provides an unusual picture of supersymmetry breaking.
Cite
@article{arxiv.0801.1671,
title = {Self-isospectrality, special supersymmetry, and their effect on the band structure},
author = {Francisco Correa and Vit Jakubsky and Luis-Miguel Nieto and Mikhail S. Plyushchay},
journal= {arXiv preprint arXiv:0801.1671},
year = {2008}
}
Comments
Title changed by the Editor of Phys. Rev. Lett., published version