Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.3656703
Title: Metal-insulator transition at a depleted LaAlO3/SrTiO 3 interface: Evidence for charge transfer induced by SrTiO 3 phase transitions
Authors: Lü, W.M.
Wang, X.
Liu, Z.Q.
Dhar, S. 
Annadi, A.
Gopinadhan, K. 
Roy Barman, A.
Su, H.B.
Venkatesan, T. 
Ariando 
Issue Date: 24-Oct-2011
Citation: Lü, W.M., Wang, X., Liu, Z.Q., Dhar, S., Annadi, A., Gopinadhan, K., Roy Barman, A., Su, H.B., Venkatesan, T., Ariando (2011-10-24). Metal-insulator transition at a depleted LaAlO3/SrTiO 3 interface: Evidence for charge transfer induced by SrTiO 3 phase transitions. Applied Physics Letters 99 (17) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3656703
Abstract: Two anomalous bias dependent resistive peaks induced by the SrTiO 3 structural phase transitions at 55 and 110 K were observed in a LaAlO3/SrTiO3 and Nb:SrTiO3 rectifying junction when the LaAlO3/SrTiO3 was depleted under reverse bias. At these transition temperatures, the barrier between LaAlO3/ SrTiO3 and Nb:SrTiO3 showed abrupt changes in the tunneling energy under forward bias. The peak at 110 K was an insulator-metal phase transition while the peak at 55 K was a metal-insulator one. We propose that the phase transitions of the SrTiO3 substrate influence the charge transfer to the LaAlO3/SrTiO3 layer, giving rise to these anomalous resistive peaks. © 2011 American Institute of Physics.
Source Title: Applied Physics Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/82683
ISSN: 00036951
DOI: 10.1063/1.3656703
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