Broken time-reversal symmetry in Josephson junction involving two-band superconductors

被引：90

作者：

Ng, T. K. ^{[1
]}

Nagaosa, N. ^{[2
,3
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Phys, Kawloon, Hong Kong, Peoples R China

[2] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[3] RIKEN, ASI, Cross Correlated Mat Res Grp CMRG, Wako, Saitama 3510198, Japan

来源：

EPL | 2009年 / 87卷 / 01期

关键词：

STATES; BA0.6K0.4FE2AS2; ORIGIN; GAPS; MGB2;

D O I：

10.1209/0295-5075/87/17003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A novel time-reversal symmetry breaking state is found theoretically in the Josephson junction between a two-gap superconductor and a conventional s-wave superconductor. This occurs as a result of frustration between the three order parameters analogous to two antiferromagnetically coupled XY-spins put under a magnetic field. This leads to formation of interface states with energies inside the superconducting gap and modified flux quantization condition for a ring composed of the two types of superconductors. Copyright (C) EPLA, 2009

引用

页数：5

共 26 条

[1] Josephson effects between multigap and single-gap superconductors [J].

Agterberg, DF ;

Demler, E ;

Janko, B .

PHYSICAL REVIEW B, 2002, 66 (21) :1-5

[2]

ATIYAH MF, 1968, ANN MATH, V87, P484, DOI 10.2307/1970715

[3] Quasiparticle interface states in junctions involving d-wave superconductors [J].

Barash, YS .

PHYSICAL REVIEW B, 2000, 61 (01) :678-688

[4] Specific heat of Mg11B2:: Evidence for a second energy cap -: art. no. 047001 [J].

Bouquet, F ;

Fisher, RA ;

Phillips, NE ;

Hinks, DG ;

Jorgensen, JD .

PHYSICAL REVIEW LETTERS, 2001, 87 (04) :47001-1

[5] Proximity effect in normal metal-multiband superconductor hybrid structures [J].

Brinkman, A ;

Golubov, AA ;

Kupriyanov, MY .

PHYSICAL REVIEW B, 2004, 69 (21) :214407-1

[6] Theory of magnetic excitons in the heavy-fermion superconductor UPd2Al3 [J].

Chang, Jun ;

Eremin, I. ;

Thalmeier, P. ;

Fulde, P. .

PHYSICAL REVIEW B, 2007, 75 (02)

[7] The origin of the anomalous superconducting properties of MgB2 [J].

Choi, HJ ;

Roundy, D ;

Sun, H ;

Cohen, ML ;

Louie, SG .

NATURE, 2002, 418 (6899) :758-760

[8] Unconventional superconductivity in Ba0.6K0.4Fe2As2 from inelastic neutron scattering [J].

Christianson, A. D. ;

Goremychkin, E. A. ;

Osborn, R. ;

Rosenkranz, S. ;

Lumsden, M. D. ;

Malliakas, C. D. ;

Todorov, I. S. ;

Claus, H. ;

Chung, D. Y. ;

Kanatzidis, M. G. ;

Bewley, R. I. ;

Guidi, T. .

NATURE, 2008, 456 (7224) :930-932

[9]

de Gennes P.G., 1989, Superconductivity of Metals and Alloys

[10] Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2 [J].

Ding, H. ;

Richard, P. ;

Nakayama, K. ;

Sugawara, K. ;

Arakane, T. ;

Sekiba, Y. ;

Takayama, A. ;

Souma, S. ;

Sato, T. ;

Takahashi, T. ;

Wang, Z. ;

Dai, X. ;

Fang, Z. ;

Chen, G. F. ;

Luo, J. L. ;

Wang, N. L. .

EPL, 2008, 83 (04)

← 1 2 3 →