Magnetism and Conductivity Along Structural Domain Walls of SrTiO3

Frenkel, Yiftach; Xie, Yanwu; Hwang, Harold Y.; Kalisky, Beena

doi:10.1007/s10948-019-05301-7

Magnetism and Conductivity Along Structural Domain Walls of SrTiO3

Journal Article · Sat Nov 16 00:00:00 EST 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/s10948-019-05301-7· OSTI ID:1619453

Frenkel, Yiftach; Xie, Yanwu; Hwang, Harold Y.; Kalisky, Beena

Abstract

The interface between the oxide insulators LaAlO ₃ and SrTiO ₃ (LAO/STO) hosts a two-dimensional electron gas. The combination of interfacial conductivity and superconductivity at ultra-low temperatures with the physical phenomena of the oxide parent materials has fueled extensive research in the field since its discovery in 2004. Scanning superconducting quantum interference device (SQUID) measurements have shown that structural domain walls, formed below 105 K, modulate the current flow at the interface and recently revealed weak magnetic signals along the same domain structure. Here we use scanning SQUID to investigate the temperature dependence of different electronic properties of the LAO/STO interface. We find correlation between magnetism and conductivity, which are both spatially modulated on the domain structure. This data suggests a possible relation between the populations of electrons participating in each order.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1619453

Alternate ID(s):: OSTI ID: 1605206

Journal Information:: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 1 Vol. 33; ISSN 1557-1939

Publisher:: Springer Science + Business MediaCopyright Statement

Country of Publication:: Germany

Language:: English

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