A systematic study of the two-dimensional electron gas at LaAlO3/SrTiO3(110) interface reveals an anisotropy alongtwo specific directions, [001] and ?1¯10?. The anisotropy becomes distinct for the interface prepared under high oxygen pres-sure with low carrier density. Angular dependence of magnetoresistance shows that the electron confinement is strongeralong the ?1 ¯10? direction. Gate-tunable magnetoresistance reveals a clear in-plane anisotropy of the spin–orbit coupling, and the spin relaxation mechanism along both directions belongs to D’yakonov–Perel’ (DP) scenario. Moreover, in-plane anisotropic superconductivity is observed for the sample with high carrier density, the superconducting transition tempera-ture is lower but the upper critical field is higher along the ?1 ¯10? direction. This in-plane anisotropy could be ascribed to the anisotropic band structure along the two crystallographic directions.
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