Multiple-gap structure in electric-field-induced surface superconductivity

被引：16

作者：

Mizohata, Yousuke ^{[1
]}

Ichioka, Masanori ^{[1
]}

Machida, Kazushige ^{[1
]}

机构：

[1] Okayama Univ, Dept Phys, Okayama 7008530, Japan

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 01期

关键词：

CONDENSATION;

D O I：

10.1103/PhysRevB.87.014505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Local superconducting gap structure is studied as a function of nanoscale depth in electric-field-induced surface superconductivity such as in SrTiO3. We examine solutions of the Bogoliubov-de Gennes equation in two limiting confinement potential cases of an electric field with and without screening effects. As unique properties different from bulk superconductivity, there appear in-gap states even for isotropic s-wave pairing, due to the multiple-gap structure of sub-band-dependent surface superconductivity. These determine the depth dependence of local superconductivity. DOI: 10.1103/PhysRevB.87.014505

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页数：5

相关论文

共 23 条

[1] ELECTRONIC-PROPERTIES OF TWO-DIMENSIONAL SYSTEMS [J].

ANDO, T ;

FOWLER, AB ;

STERN, F .

REVIEWS OF MODERN PHYSICS, 1982, 54 (02) :437-672

[2] Gate-tuned superfluid density at the superconducting LaAlO3/SrTiO3 interface [J].

Bert, Julie A. ;

Nowack, Katja C. ;

Kalisky, Beena ;

Noad, Hilary ;

Kirtley, John R. ;

Bell, Chris ;

Sato, Hiroki K. ;

Hosoda, Masayuki ;

Hikita, Yasayuki ;

Hwang, Harold Y. ;

Moler, Kathryn A. .

PHYSICAL REVIEW B, 2012, 86 (06)

[3] Two-Dimensional Superconducting Phase in LaTiO3/SrTiO3 Heterostructures Induced by High-Mobility Carrier Doping [J].

Biscaras, J. ;

Bergeal, N. ;

Hurand, S. ;

Grossetete, C. ;

Rastogi, A. ;

Budhani, R. C. ;

LeBoeuf, D. ;

Proust, C. ;

Lesueur, J. .

PHYSICAL REVIEW LETTERS, 2012, 108 (24)

[4]

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

[5] ELEMENTARY EXCITATIONS IN THE VICINITY OF A NORMAL METAL-SUPERCONDUCTING METAL CONTACT [J].

DEGENNES, PG ;

SAINTJAMES, D .

PHYSICS LETTERS, 1963, 4 (02) :151-152

[6] POSSIBLE PAIRING WITHOUT SUPERCONDUCTIVITY AT LOW CARRIER CONCENTRATIONS IN BULK AND THIN-FILM SUPERCONDUCTING SEMICONDUCTORS [J].

EAGLES, DM .

PHYSICAL REVIEW, 1969, 186 (02) :456-&

[7] Electronic structure of stripes in two-dimensional Hubbard model [J].

Ichioka, M ;

Machida, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1999, 68 (12) :4020-4031

[8] PROXIMITY EFFECT OF THIN-FILMS ON SUPERCONDUCTING SUBSTRATES [J].

IM, HK ;

JAGLA, EA ;

BALSEIRO, CA .

PHYSICAL REVIEW B, 1994, 50 (14) :10117-10121

[9] Bose-Einstein condensation of molecules [J].

Jochim, S ;

Bartenstein, M ;

Altmeyer, A ;

Hendl, G ;

Riedl, S ;

Chin, C ;

Denschlag, JH ;

Grimm, R .

SCIENCE, 2003, 302 (5653) :2101-2103

[10] Tunnelling effects on surface bound states in unconventional superconductors [J].

Kashiwaya, S ;

Tanaka, Y .

REPORTS ON PROGRESS IN PHYSICS, 2000, 63 (10) :1641-1724