2009年10月
Mechanism for the Singlet to Triplet Superconductivity Crossover in Quasi-One-Dimensional Organic Conductors
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
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- 巻
- 78
- 号
- 10
- 開始ページ
- 104702(1-11)
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1143/JPSJ.78.104702
- 出版者・発行元
- PHYSICAL SOC JAPAN
Superconductivity of quasi-one-dimensional organic conductors with a quarter-filled band is investigated using the two-loop renormalization group approach to the extended Hubbard model for which both the single electron hopping t(perpendicular to) and the repulsive interaction V-perpendicular to perpendicular to the chains are included. For a four-patches Fermi surface with deviations to perfect nesting, we calculate the response functions for the dominant fluctuations and possible superconducting states. By increasing V-perpendicular to, it is shown that a d-wave (singlet) to f-wave (triplet) superconducting state crossover occurs, and is followed by a vanishing spin gap. Furthermore, we Study the influence of a magnetic field through the Zeeman coupling, from which a triplet superconducting state is found to emerge.
- リンク情報
- ID情報
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- DOI : 10.1143/JPSJ.78.104702
- ISSN : 0031-9015
- Web of Science ID : WOS:000271208500020