Open AccessStructural and subband changes at the LaAlO3/SrTiO3 interface investigated by two-dimensional correlation spectroscopy
Author(s) -
Xin Feng,
Kun Zhao,
Lizhi Xiao,
Honglei Zhan,
Wenfeng Xiang,
Zhiqing Lü
Publication year - 2015
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4923239
Subject(s) - spectroscopy , materials science , condensed matter physics , infrared spectroscopy , infrared , electronic correlation , magnetic field , wavelength , interface (matter) , nuclear magnetic resonance , electron , chemistry , optoelectronics , optics , physics , organic chemistry , quantum mechanics , capillary number , capillary action , composite material
The interplay among many ground states in correlated electron materials, especially at the LaAlO3/SrTiO3 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, TC. 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
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