Structural and subband changes at the LaAlO{sub 3}/SrTiO{sub 3} interface investigated by two-dimensional correlation spectroscopy

The interplay among many ground states in correlated electron materials, especially at the LaAlO{sub 3}/SrTiO{sub 3} interface is central in deeply understanding the physical characteristics and improving further applications of these materials. Here, we use two-dimensional infrared correlation spec...

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Bibliographic Details
Published in:AIP advances 2015-06, Vol.5 (6)
Main Authors: Feng, Xin, Zhao, Kun, Zhan, Hong-Lei, Xiang, Wen-Feng, Lu, Zhi-Qing, Beijing Key Laboratory of Optical Detection Technology for Oil and Gas, China University of Petroleum, Beijing 102249, Xiao, Li-Zhi
Format: Article
Language:English
Subjects:
ABSORPTION SPECTROSCOPY
ALUMINATES
COMPARATIVE EVALUATIONS
ELECTRON CORRELATION
GROUND STATES
INFRARED SPECTRA
INTERFACES
L-S COUPLING
LANTHANUM COMPOUNDS
MAGNETIC FIELDS
MATERIALS SCIENCE
STRONTIUM TITANATES
TRANSITION TEMPERATURE
TWO-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL SYSTEMS
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Summary:The interplay among many ground states in correlated electron materials, especially at the LaAlO{sub 3}/SrTiO{sub 3} interface is central in deeply understanding the physical characteristics and improving further applications of these materials. Here, we use two-dimensional infrared correlation spectroscopy to study the influence of magnetic fields and temperature on the mid-infrared spectral responsivity of the interface. The magnetic field plays the main role at temperatures below the transition temperature, T{sub C}. Two additional spectral peaks were identified at wavelengths of 2800 nm and 3400 nm, when compared with our prior studies. All of these response bands are related to the spin-orbit coupling effect and crystal structure changes. Detailed structural and subband changes in the interface are also investigated.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4923239