skip to main content

Title: Enhancing mid-infrared spectral response at the LaAlO{sub 3}/SrTiO{sub 3} interface by magnetic field

Many unexpected properties have been found in the LaAlO{sub 3}/SrTiO{sub 3} heterostructure, but the interaction of the many ground states at its interface remains unclear. Here, we demonstrate an optical property of this n-type heterostructure where the mid-infrared spectral responsivity at the interface is enhanced by an external magnetic field. The field intensity ranged from 0.8 to 6 kOe at a low temperature (19 K) as measured with our spectral response measurement system. Two spectral peaks related to the spin-orbit coupling effect were also observed at wavelengths 2400 nm and 3700 nm. The intriguing phenomena relate to changes in the crystallographic structure and subband structure at the interface.
Authors:
; ; ; ; ;  [1] ;  [2] ;  [3] ;  [4]
  1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249 (China)
  2. (China)
  3. Petroleum Exploration and Production Research Institute, China Petroleum and Chemical Corporation, Beijing 100083 (China)
  4. College of Science, China University of Petroleum, Qingdao 266580 (China)
Publication Date:
OSTI Identifier:
22395525
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 24; 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; ALUMINATES; CRYSTAL STRUCTURE; GROUND STATES; HETEROJUNCTIONS; INTERFACES; LANTHANUM COMPOUNDS; L-S COUPLING; MAGNETIC FIELDS; N-TYPE CONDUCTORS; OPTICAL PROPERTIES; SPECTRAL RESPONSE; STRONTIUM TITANATES