Two-dimensional superconductivity at (110) LaAlO3/SrTiO3 interfaces

Two-dimensional superconductivity at (110) LaAlO3/SrTiO3 interfaces

Novel low dimensional quantum phenomena at (110) LaAlO3/SrTiO3 (LAO/STO) interfaces are expected after the quasi two dimensional electron gas similar to that of (001) LAO/STO interfaces was found at this (110) system. Here, we report the two dimensional superconductivity with a superconducting trans...

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Veröffentlicht in:Applied physics letters 2014-11, Vol.105 (19)
Hauptverfasser: Han, Yin-Long, Shen, Sheng-Chun, You, Jie, Li, Hai-Ou, Luo, Zhong-Zhong, Li, Cheng-Jian, Qu, Guo-Liang, Xiong, Chang-Min, Dou, Rui-Fen, He, Lin, Naugle, Don, Guo, Guo-Ping, Nie, Jia-Cai
Format: Artikel
Sprache:eng
Schlagworte:
Applied physics
Electron gas
Electronic devices
Quantum phenomena
Strontium titanates
Superconductivity
Thickness
Transition temperature
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Zusammenfassung:Novel low dimensional quantum phenomena at (110) LaAlO3/SrTiO3 (LAO/STO) interfaces are expected after the quasi two dimensional electron gas similar to that of (001) LAO/STO interfaces was found at this (110) system. Here, we report the two dimensional superconductivity with a superconducting transition temperature of ≅ 184 mK at (110) LAO/STO interfaces. The two dimensional characteristics of the superconductivity are consistent with our analysis based on a Berezinskii-Kosterlitz-Thouless transition. The estimated superconducting layer thickness is about 18 nm. This discovery may inspire new studies of LAO/STO interfaces and open additional opportunities for design of novel oxide electronic devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4901940