Josephson effect in quasi one-dimensional superconductors (TMTSF) 2X

Y. Asano; Y. Tanuma; Y. Tanaka; K. Kuroki; H. Tsuchiura; S. Kashiwaya

doi:10.1016/j.physc.2003.12.032

Josephson effect in quasi one-dimensional superconductors (TMTSF) ₂X

Y. Asano, Y. Tanuma, Y. Tanaka, K. Kuroki, H. Tsuchiura, S. Kashiwaya

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Josephson effect in junctions of quasi one-dimensional organic superconductors (TMTSF)₂X is discussed. We assume the quarter-filling electron band and p, d and f wave like pairing symmetries in superconductors. To realize the electronic structures in real materials, we introduce the asymmetric hopping integral (t′) between second nearest lattice sites. For t′=0, the Josephson current in the d wave symmetry saturates in low temperatures, whereas those in p and f wave symmetries show the low-temperature anomaly due to the zero-energy state (ZES) at the junction interface. The low-temperature anomaly appears even in the d wave symmetry in the presence of t′, whereas the anomaly is suppressed in the f wave symmetry.

Original language	English
Pages (from-to)	212-216
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	412-414
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2003.12.032
Publication status	Published - 2004 Oct 1
Externally published	Yes

Keywords

Low-temperature anomaly
Quarter-filling
Zero-energy states

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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abstract = "Josephson effect in junctions of quasi one-dimensional organic superconductors (TMTSF)2X is discussed. We assume the quarter-filling electron band and p, d and f wave like pairing symmetries in superconductors. To realize the electronic structures in real materials, we introduce the asymmetric hopping integral (t′) between second nearest lattice sites. For t′=0, the Josephson current in the d wave symmetry saturates in low temperatures, whereas those in p and f wave symmetries show the low-temperature anomaly due to the zero-energy state (ZES) at the junction interface. The low-temperature anomaly appears even in the d wave symmetry in the presence of t′, whereas the anomaly is suppressed in the f wave symmetry.",

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AU - Asano, Y.

AU - Tanuma, Y.

AU - Tanaka, Y.

AU - Kuroki, K.

AU - Tsuchiura, H.

AU - Kashiwaya, S.

PY - 2004/10/1

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AB - Josephson effect in junctions of quasi one-dimensional organic superconductors (TMTSF)2X is discussed. We assume the quarter-filling electron band and p, d and f wave like pairing symmetries in superconductors. To realize the electronic structures in real materials, we introduce the asymmetric hopping integral (t′) between second nearest lattice sites. For t′=0, the Josephson current in the d wave symmetry saturates in low temperatures, whereas those in p and f wave symmetries show the low-temperature anomaly due to the zero-energy state (ZES) at the junction interface. The low-temperature anomaly appears even in the d wave symmetry in the presence of t′, whereas the anomaly is suppressed in the f wave symmetry.

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