Anisotropic magneto-transport effects at SrTiO3\LaAlO3 interfaces
M. Ben Shalom, C. W. Tai, Y. Lereah, M. Sachs, E. Levy, D., Rakhmilevitch, A. Palevski, Y. Dagan
TL;DR
This paper investigates the anisotropic magneto-transport properties of SrTiO3 extless LaAlO3 interfaces, revealing superconductivity at very low temperatures and potential magnetic ordering at higher temperatures, with implications for understanding complex oxide interfaces.
Contribution
It provides detailed measurements of resistivity, magnetoresistance, and anisotropy, highlighting the interplay between superconductivity and magnetic ordering at oxide interfaces.
Findings
Superconductivity observed below 130mK at low magnetic fields.
Strong anisotropy in magnetoresistance suggests magnetic ordering below 35K.
Resistivity and magnetotransport properties depend on temperature and magnetic field orientation.
Abstract
The resistivity as a function of temperature, magnetic field and its orientation for atomically flat SrTiO3\LaAlO3 interfaces with carrier densities of ~3*10^13 cm^-2 is reported. At low magnetic fields superconductivity is observed below 130mK. The temperature dependence of the high field magnetoresistance and its strong anisotropy suggest possible magnetic ordering below 35K. The origin of this ordering and its possible relation to superconductivity are discussed.
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