Physical Properties of composite structures of d- and s-wave superconductors (d-dot's)

Masaru Kato; Masaki Hirayama; Masahiko Machida; Tomio Koyama; Takakazu Ishida

doi:10.1063/1.2354937

Physical Properties of composite structures of d- and s-wave superconductors (d-dot's)

Masaru Kato, Masaki Hirayama, Masahiko Machida, Tomio Koyama, Takakazu Ishida

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

3 Citations (Scopus)

Abstract

High-T_c superconducting dot embedded in an s-wave superconductor, which is called "d-dot", shows unusual properties. Especially, it shows spontaneous half-quantized magnetic fluxes at the corners of the dot because of the anisotropy of d-wave superconductivity. The d-dot can be considered as an artificial spin, because most stable states are doubly degenerate. We study stability of these degenerate states, using two-components Ginzburg-Landau equation. We show the energy difference between these degenerate states and excited states is comparable to the condensation energy of s-wave superconductor at T=0.

Original language	English
Title of host publication	LOW TEMPERATURE PHYSICS
Subtitle of host publication	24th International Conference on Low Temperature Physics - LT24
Pages	781-782
Number of pages	2
DOIs	https://doi.org/10.1063/1.2354937
Publication status	Published - 2006
Externally published	Yes
Event	LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States Duration: 2006 Aug 10 → 2006 Oct 17

Publication series

Name	AIP Conference Proceedings
Volume	850
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Country/Territory	United States
City	Orlando, FL
Period	06/8/10 → 06/10/17

Keywords

Ginzburg-Landau equation
Half-quantized vortex
High-temperature superconductors
Nano-superconductors

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.2354937

Cite this

Physical Properties of composite structures of d- and s-wave superconductors (d-dot's). / Kato, Masaru; Hirayama, Masaki; Machida, Masahiko et al.

LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. 2006. p. 781-782 (AIP Conference Proceedings; Vol. 850).

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

Kato, M, Hirayama, M, Machida, M, Koyama, T & Ishida, T 2006, Physical Properties of composite structures of d- and s-wave superconductors (d-dot's). in LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. AIP Conference Proceedings, vol. 850, pp. 781-782, LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24, Orlando, FL, United States, 06/8/10. https://doi.org/10.1063/1.2354937

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T1 - Physical Properties of composite structures of d- and s-wave superconductors (d-dot's)

AU - Kato, Masaru

AU - Hirayama, Masaki

AU - Machida, Masahiko

AU - Koyama, Tomio

AU - Ishida, Takakazu

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N2 - High-Tc superconducting dot embedded in an s-wave superconductor, which is called "d-dot", shows unusual properties. Especially, it shows spontaneous half-quantized magnetic fluxes at the corners of the dot because of the anisotropy of d-wave superconductivity. The d-dot can be considered as an artificial spin, because most stable states are doubly degenerate. We study stability of these degenerate states, using two-components Ginzburg-Landau equation. We show the energy difference between these degenerate states and excited states is comparable to the condensation energy of s-wave superconductor at T=0.

AB - High-Tc superconducting dot embedded in an s-wave superconductor, which is called "d-dot", shows unusual properties. Especially, it shows spontaneous half-quantized magnetic fluxes at the corners of the dot because of the anisotropy of d-wave superconductivity. The d-dot can be considered as an artificial spin, because most stable states are doubly degenerate. We study stability of these degenerate states, using two-components Ginzburg-Landau equation. We show the energy difference between these degenerate states and excited states is comparable to the condensation energy of s-wave superconductor at T=0.

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KW - Half-quantized vortex

KW - High-temperature superconductors

KW - Nano-superconductors

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Physical Properties of composite structures of d- and s-wave superconductors (d-dot's)

Abstract

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Keywords

ASJC Scopus subject areas

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