Coexistence of many-body effects at the LaAlO3/SrTiO3 interface

Complicated interactions among many particles can bring about diverse many-body phenomena which are the core content of condensed matter physics. Here, we perform tunneling measurements in metal/LaAlO3/SrTiO3 junctions, which exhibit coexistence of three types of many-body effects in a single system...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2019-12, Vol.58 (12)
Main Authors: Yan, Yuedong, Guo, Linhai, Zeng, Changgan
Format: Article
Language:English
Online Access:Get full text
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Summary:Complicated interactions among many particles can bring about diverse many-body phenomena which are the core content of condensed matter physics. Here, we perform tunneling measurements in metal/LaAlO3/SrTiO3 junctions, which exhibit coexistence of three types of many-body effects in a single system. These effects are the Kondo resonance, superconductivity, and the Altshuler-Aronov effect, which can be effectively tuned by temperature, magnetic field, and electrostatic gating. Our results suggest that the two-dimensional electron system at the LaAlO3/SrTiO3 interface may provide an ideal platform for exploiting emergent interactions among rich physical ingredients, such as electron-electron correlation, disorder, magnetic moments, and Cooper pairing.
ISSN:0021-4922
1347-4065
DOI:10.7567/1347-4065/ab55b0