論文

査読有り
2013年5月

Anomalous Flux Quantization in the Spin-Imbalanced Attractive Hubbard Ring

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
  • Kazuhiro Sano
  • ,
  • Yoshiaki Ono

82
5
開始ページ
054707-1
終了ページ
054707-5
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.7566/JPSJ.82.054707
出版者・発行元
PHYSICAL SOC JAPAN

We investigate the one-dimensional Hubbard ring with attractive interaction in the presence of imbalanced spin populations by using the exact diagonalization method. The singlet pairing correlation function is found to show spatial oscillations with power-law decay as expected in the Fulde-Ferrell-Larkin-Ovchinnikov state of a Tomonaga-Luttinger liquid. In the strong coupling regime, the system shows an anomalous flux quantization of period h/4e, half of the superconducting flux quantum of h/2e, as recently predicted by mean-field analysis, together with various flux quanta smaller than h/4e. Notably, the observed flux quanta are determined by the difference between the system size N-L and electron number N-e as h/(N-L - N-e)e.

リンク情報
DOI
https://doi.org/10.7566/JPSJ.82.054707
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000318064100019&DestApp=WOS_CPL
ID情報
  • DOI : 10.7566/JPSJ.82.054707
  • ISSN : 0031-9015
  • Web of Science ID : WOS:000318064100019

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