Electrostatic tuning of magnetism at the conducting (111) (La$_{0.3}$Sr$_{0.7}$)(Al$_{0.65}$Ta$_{0.35}$)/SrTiO$_3$ interface

V. V. Bal; Z. Huang; K. Han; Ariando; T. Venkatesan; V. Chandrasekhar

doi:10.1063/1.4986912

paper

Electrostatic tuning of magnetism at the conducting (111) (La $_{0.3}$ Sr $_{0.7}$ )(Al $_{0.65}$ Ta $_{0.35}$ )/SrTiO $_{3}$ interface

arXiv:1706.00848 · doi:10.1063/1.4986912

Abstract

We present measurements of the low temperature electrical transport properties of the two dimensional carrier gas that forms at the interface of $(111)$ (La $_{0.3}$ Sr $_{0.7}$ )(Al $_{0.65}$ Ta $_{0.35}$ )/SrTiO $_{3}$ (LSAT/STO) as a function of applied back gate voltage, $V_{g}$ . As is found in (111) LaAlO $_{3}$ /SrTiO $_{3}$ interfaces, the low-field Hall coefficient is electron-like, but shows a sharp reduction in magnitude below $V_{g} \sim$ 20 V, indicating the presence of hole-like carriers in the system. This same value of $V_{g}$ correlates approximately with the gate voltage below which the magnetoresistance evolves from nonhysteretic to hysteretic behavior at millikelvin temperatures, signaling the onset of magnetic order in the system. We believe our results can provide insight into the mechanism of magnetism in SrTiO $_{3}$ based systems.

5 pages, 3 figures

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Electron trapping and detrapping in an oxide two-dimensional electron gas: The role of ferroelastic twin walls

Electrostatic tuning of magnetism at the conducting (111) (La0.3​Sr0.7​)(Al0.65​Ta0.35​)/SrTiO3​ interface

Abstract

References in corpus (7)

Cited by in corpus (1)

Electrostatic tuning of magnetism at the conducting (111) (La $_{0.3}$ Sr $_{0.7}$ )(Al $_{0.65}$ Ta $_{0.35}$ )/SrTiO $_{3}$ interface