Evidence for lattice-polarization-enhanced field effects at the SrTiO3-based heterointerface
Evidence for lattice-polarization-enhanced field effects at the SrTiO3-based heterointerface
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SrTiO3 基异质界面晶格偏振增强场效应的证据
DOI:
10.1038/srep22418
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发表时间:
2016-03
影响因子:
4.6
通讯作者:
Jirong Sun
中科院分区:
文献类型:
--
作者:
Y.Li;H.R.Zhang;Y.Lei;Y.Z.Chen;N. Pryds;Baogen Shen;Jirong Sun
Electrostatic gating provides a powerful approach to tune the conductivity of the two-dimensional electron liquid between two insulating oxides. For the LaAlO3/SrTiO3(LAO/STO) interface, such gating effect could be further enhanced by a strong lattice polarization of STO caused by simultaneous application of gate field and illumination light. Herein, by monitoring the discharging process upon removing the gate field, we give firm evidence for the occurrence of this lattice polarization at the amorphous-LaAlO3/SrTiO3interface. Moreover, we find that the lattice polarization is accompanied with a large expansion of the out-of-plane lattice of STO. Photo excitation affects the polarization process by accelerating the field-induced lattice expansion. The present work demonstrates the great potential of combined stimuli in exploring emergent phenomenon at complex oxide interfaces.
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作者:
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通讯作者:
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影响因子:
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DOI:
--
发表时间:
2008
期刊:
--
影响因子:
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通讯作者:
C. Cen;S. Thiel;G. Hammerl;C. Schneider;K. Andersen;C. Hellberg;J. Mannhart;J. Levy