Density-Functional Theory of the Fractional Quantum Hall Effect

Jianyun Zhao, Manisha Thakurathi, Manish Jain, Diptiman Sen, J. K. Jain

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

A conceptual difficulty in formulating the density-functional theory of the fractional quantum Hall effect is that while in the standard approach the Kohn-Sham orbitals are either fully occupied or unoccupied, the physics of the fractional quantum Hall effect calls for fractionally occupied Kohn-Sham orbitals. This has necessitated averaging over an ensemble of Slater determinants to obtain meaningful results. We develop an alternative approach in which we express and minimize the grand canonical potential in terms of the composite fermion variables. This provides a natural resolution of the fractional-occupation problem because the fully occupied orbitals of composite fermions automatically correspond to fractionally occupied orbitals of electrons. We demonstrate the quantitative validity of our approach by evaluating the density profile of fractional Hall edge as a function of temperature and the distance from the delta dopant layer and showing that it reproduces edge reconstruction in the expected parameter region.

Original languageEnglish (US)
Article number196802
JournalPhysical Review Letters
Volume118
Issue number19
DOIs
StatePublished - May 10 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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