Triplet Scenario of Superconductivity vs. Singlet One in (TMTSF)2X Materials

Andrei Lebed; S. Wu

doi:10.1007/978-3-540-76672-8_23

Triplet Scenario of Superconductivity vs. Singlet One in (TMTSF)₂X Materials

Andrei Lebed, S. Wu

Physics

Research output: Chapter in Book/Report/Conference proceeding › Chapter

1 Scopus citations

Abstract

We discuss experimental data, obtained on organic quasi-one-dimensional (TMTSF)₂X (X=PF₆ and ClO₄) superconductors, which reveal unconventional nature of their superconducting phases. Our theoretical interpretation of the data supports a triplet scenario of superconductivity in (TMTSF)₂PF₆ material. In particular, we suggest a careful theoretical analysis of the recently measured anisotropic upper critical fields. On a basis of this analysis, we suggest that the triplet superconducting order parameter is described by a d-vector with d_a(k) ≠ 0 and d_b(k) = dc(k) = 0, which defines a spin part of the order parameter but does not uniquely define its orbital part, d_a(k). We consider two major possible orbital parts of this triplet order parameter, p_x-wave and py-wave ones. In the end of the chapter, we discuss in a brief a d-wave singlet scenario of superconductivity, which we consider as a possibility in (TMTSF)₂ClO₄ material.

Original language	English (US)
Title of host publication	Springer Series in Materials Science
Publisher	Springer-Verlag
Pages	643-659
Number of pages	17
DOIs	https://doi.org/10.1007/978-3-540-76672-8_23
State	Published - 2008

Publication series

Name	Springer Series in Materials Science
Volume	110
ISSN (Print)	0933-033X
ISSN (Electronic)	2196-2812

Keywords

Conducting Chain
Fermi Surface
Knight Shift
Orbital Part
Vector Order Parameter

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1007/978-3-540-76672-8_23

Cite this

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title = "Triplet Scenario of Superconductivity vs. Singlet One in (TMTSF)2X Materials",

abstract = "We discuss experimental data, obtained on organic quasi-one-dimensional (TMTSF)2X (X=PF6 and ClO4) superconductors, which reveal unconventional nature of their superconducting phases. Our theoretical interpretation of the data supports a triplet scenario of superconductivity in (TMTSF)2PF6 material. In particular, we suggest a careful theoretical analysis of the recently measured anisotropic upper critical fields. On a basis of this analysis, we suggest that the triplet superconducting order parameter is described by a d-vector with da(k) ≠ 0 and db(k) = dc(k) = 0, which defines a spin part of the order parameter but does not uniquely define its orbital part, da(k). We consider two major possible orbital parts of this triplet order parameter, px-wave and py-wave ones. In the end of the chapter, we discuss in a brief a d-wave singlet scenario of superconductivity, which we consider as a possibility in (TMTSF)2ClO4 material.",

keywords = "Conducting Chain, Fermi Surface, Knight Shift, Orbital Part, Vector Order Parameter",

author = "Andrei Lebed and S. Wu",

note = "Funding Information: The author is thankful to N.N. Bagmet (Lebed), S.E. Brown, P.M. Chaikin, D. Jerome, L.P. Gorkov, and J. Singleton for fruitful discussions. This work was partially supported by the NSF grant DMR-0705986. Publisher Copyright: {\textcopyright} 2008, Springer-Verlag Berlin Heidelberg.",

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doi = "10.1007/978-3-540-76672-8_23",

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AU - Lebed, Andrei

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N1 - Funding Information: The author is thankful to N.N. Bagmet (Lebed), S.E. Brown, P.M. Chaikin, D. Jerome, L.P. Gorkov, and J. Singleton for fruitful discussions. This work was partially supported by the NSF grant DMR-0705986. Publisher Copyright: © 2008, Springer-Verlag Berlin Heidelberg.

PY - 2008

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N2 - We discuss experimental data, obtained on organic quasi-one-dimensional (TMTSF)2X (X=PF6 and ClO4) superconductors, which reveal unconventional nature of their superconducting phases. Our theoretical interpretation of the data supports a triplet scenario of superconductivity in (TMTSF)2PF6 material. In particular, we suggest a careful theoretical analysis of the recently measured anisotropic upper critical fields. On a basis of this analysis, we suggest that the triplet superconducting order parameter is described by a d-vector with da(k) ≠ 0 and db(k) = dc(k) = 0, which defines a spin part of the order parameter but does not uniquely define its orbital part, da(k). We consider two major possible orbital parts of this triplet order parameter, px-wave and py-wave ones. In the end of the chapter, we discuss in a brief a d-wave singlet scenario of superconductivity, which we consider as a possibility in (TMTSF)2ClO4 material.

AB - We discuss experimental data, obtained on organic quasi-one-dimensional (TMTSF)2X (X=PF6 and ClO4) superconductors, which reveal unconventional nature of their superconducting phases. Our theoretical interpretation of the data supports a triplet scenario of superconductivity in (TMTSF)2PF6 material. In particular, we suggest a careful theoretical analysis of the recently measured anisotropic upper critical fields. On a basis of this analysis, we suggest that the triplet superconducting order parameter is described by a d-vector with da(k) ≠ 0 and db(k) = dc(k) = 0, which defines a spin part of the order parameter but does not uniquely define its orbital part, da(k). We consider two major possible orbital parts of this triplet order parameter, px-wave and py-wave ones. In the end of the chapter, we discuss in a brief a d-wave singlet scenario of superconductivity, which we consider as a possibility in (TMTSF)2ClO4 material.

KW - Conducting Chain

KW - Fermi Surface

KW - Knight Shift

KW - Orbital Part

KW - Vector Order Parameter

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