skip to main content

Title: Two-dimensional superconductivity at (110) LaAlO{sub 3}/SrTiO{sub 3} interfaces

Novel low dimensional quantum phenomena at (110) LaAlO{sub 3}/SrTiO{sub 3} (LAO/STO) interfaces are expected after the quasi two dimensional electron gas similar to that of (001) LAO/STO interfaces was found at this (110) system. Here, we report the two dimensional superconductivity with a superconducting transition temperature of ≅ 184 mK at (110) LAO/STO interfaces. The two dimensional characteristics of the superconductivity are consistent with our analysis based on a Berezinskii-Kosterlitz-Thouless transition. The estimated superconducting layer thickness is about 18 nm. This discovery may inspire new studies of LAO/STO interfaces and open additional opportunities for design of novel oxide electronic devices.
Authors:
; ; ; ; ; ; ; ;  [1] ; ; ;  [2] ;  [3]
  1. Department of Physics, Beijing Normal University, Beijing 100875 (China)
  2. Key Laboratory of Quantum Information, Department of Optics and Optical Engineering, University of Science and Technology of China, Chinese Academy of Science, Hefei 230026 (China)
  3. Department of Physics and Astronomy, Texas A and M University, College Station, Texas 77843 (United States)
Publication Date:
OSTI Identifier:
22391961
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALUMINIUM OXIDES; ELECTRON GAS; ELECTRONIC EQUIPMENT; INTERFACES; LANTHANUM COMPOUNDS; STRONTIUM TITANATES; SUPERCONDUCTIVITY; TEMPERATURE RANGE 0000-0013 K; TRANSITION TEMPERATURE; TWO-DIMENSIONAL CALCULATIONS