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Electron correlations in a partially filled first excited Landau level

Authors
  • Wojs, Arkadiusz
  • Quinn, John J.
Type
Published Article
Publication Date
Jun 01, 2001
Submission Date
Jun 01, 2001
Identifiers
DOI: 10.1016/S1386-9477(01)00243-0
arXiv ID: cond-mat/0106016
Source
arXiv
License
Unknown
External links

Abstract

The form of electron correlations in a partially filled degenerate Landau level (LL) is related to the behavior of the anharmonic part of the interaction pseudopotential. Unlike in the lowest LL, the pseudopotential in the first excited LL is harmonic at short range. As a result, the incompressible states in this LL have different correlations, occur at different filling factors nu, and cannot be described by a composite fermion model. The series of Laughlin-correlated states of electron pairs is proposed at nu=2+2/(q_2+2) with integer q_2. It includes Moore-Read nu=5/2 state and the nu=7/3 state. Despite coincidence of the values of nu, the latter state has different correlations than Laughlin state of single electrons at nu=1/3 and, in finite systems, occurs at a different LL degeneracy (flux).

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