Novel low dimensional quantum phenomena are expected at (110) LaAlO3/SrTiO3 (LAO/STO) interfaces after the quasi two dimensional electron gas similar to that of (001) LAO/STO interfaces was found [G. Herranz et al., Sci. Rep. 2, 758 (2012) and A. Annadi et al., Nat. Commun. 4, 1838 (2013)]. Here, two dimensional superconductivity of (110) LAO/STO samples with a superconducting transition temperature of 184 mK is demonstrated based on systematical transport measurements. The two dimensional characteristic of the superconductivity is confirmed by analyzing the Berezinskii-Kosterlitz-Thouless transition. The estimated superconductive thickness is about 18 nm. These features of superconductivity of (110) LAO/STO interfaces are comparable to those of (001) LAO/STO interfaces. This discovery may inspire a new round of upsurge on study of LAO/STO interfaces.
@article{arxiv.1409.5855,
title = {Two-dimensional superconductivity at (110) LaAlO3/SrTiO3 interfaces},
author = {Yin-Long Han and Sheng-Chun Shen and Jie You and Hai-Ou Li and Zhong-Zhong Luo and Cheng-Jian Li and Guo-Liang Qu and Chang-Min Xiong and Rui-Fen Dou and Lin He and Donald G Naugle and Guo-Ping Guo and Jia-Cai Nie},
journal= {arXiv preprint arXiv:1409.5855},
year = {2014}
}