Superconducting interfaces between insulating oxides.
At interfaces between complex oxides, electronic systems with unusual electronic properties can be generated. We report on superconductivity in the electron gas formed at the interface between two insulating dielectric perovskite oxides, LaAlO3 and SrTiO3. The behavior of the electron gas is that of a two-dimensional superconductor, confined to a thin sheet at the interface. The superconducting transition temperature of congruent with 200 millikelvin provides a strict upper limit to the thickness of the superconducting layer of congruent with 10 nanometers.
Reyren
N
N
Département de Physique de la Matière Condensée, University of Geneva, 24 quai Ernest-Ansermet, 1211 Genève 4, Switzerland.
Thiel
S
S
Caviglia
A D
AD
Kourkoutis
L Fitting
LF
Hammerl
G
G
Richter
C
C
Schneider
C W
CW
Kopp
T
T
Rüetschi
A-S
AS
Jaccard
D
D
Gabay
M
M
Muller
D A
DA
Triscone
J-M
JM
Mannhart
J
J