Two-dimensional superconductivity between SrTiO3 and amorphous Al2O3
Two-dimensional superconductivity between SrTiO3 and amorphous Al2O3
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DOI：
10.1063/1.4895120
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发表时间：
2014-09-01
影响因子：
4
通讯作者：
von Loehneysen, Hilbert
中科院分区：
文献类型：
--
作者：
Fuchs, Dirk;Schaefer, Roland;von Loehneysen, Hilbert
在绝缘非晶Al 2 O3和TiO 2封端的（001）取向SrTiO 3之间观察到二维（2D）超导电性。异质结构显示界面金属导电性从室温下到约200 mK的超导设置。电压-电流V（I）特性表明幂律标度行为V与I-α成比例，具有依赖于温度的指数α，指示在T-BKT接近160 mK和2D超导状态下的Berezinskiii-Kosterlitz-无相变。超导转变被发现对磁场B非常敏感。(C)2014 AIP Publishing LLC.
Two-dimensional (2D) superconductivity is observed between insulating amorphous Al2O3 and TiO2-terminated (001)-oriented SrTiO3. The heterostructure displays interfacial metallic conduction from room temperature down to approximate to 200 mK where superconductivity sets in. The voltage-current V(I) characteristics indicate a power-law scaling behavior V proportional to I-alpha with a temperature dependent exponent alpha, indicative for a Berezinskii-Kosterlitz-Thouless transition at T-BKT approximate to 160 mK and a 2D superconducting state. The superconducting transition was found to be very sensitive to a magnetic field B. (C) 2014 AIP Publishing LLC.