Abstract
Local superconducting gap structure is studied as a function of nanoscale depth in electric-field-induced surface superconductivity such as in SrTiO 3. 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.
| Original language | English |
|---|---|
| Article number | 014505 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 87 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 11 2013 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Multiple-gap structure in electric-field-induced surface superconductivity. / Mizohata, Yousuke; Ichioka, Masanori; Machida, Kazushige.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 87, No. 1, 014505, 11.01.2013.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Multiple-gap structure in electric-field-induced surface superconductivity
AU - Mizohata, Yousuke
AU - Ichioka, Masanori
AU - Machida, Kazushige
PY - 2013/1/11
Y1 - 2013/1/11
N2 - Local superconducting gap structure is studied as a function of nanoscale depth in electric-field-induced surface superconductivity such as in SrTiO 3. 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.
AB - Local superconducting gap structure is studied as a function of nanoscale depth in electric-field-induced surface superconductivity such as in SrTiO 3. 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.
UR - http://www.scopus.com/inward/record.url?scp=84872904424&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84872904424&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.87.014505
DO - 10.1103/PhysRevB.87.014505
M3 - Article
AN - SCOPUS:84872904424
VL - 87
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 1
M1 - 014505
ER -