Nanoscale Inhomogeneous Energy Landscape in LaAlO<sub>3</sub>/SrTiO<sub>3</sub> Heterostructures
ORAL
Abstract
The energy landscape of LaAlO3/SrTiO3 (LAO/STO) heterostructures plays an important role in determining the transport phenomena. An inhomogeneous energy landscape can lead to the breakdown of 2D transport and the emergence of 1D transport. Thus, knowledge of the energy landscape of the system can play a significant role in understanding correlated electron systems. Here we report a minimally invasive probing technique to map the energy landscape of LAO/STO heterostructures. Using conductive atomic force microscope (c-AFM) lithography [1], we write nanoscale cross-shaped electron waveguides, or “nanocrosses”. Low temperature magnetotransport measurements reveal signs of spatial inhomogeneity. Anisotropic magnetoconductance and anomalous Hall resistance also indicate inhomogeneity. The nanocross geometry provides a powerful tool for exploring the energy landscape of the system and its implications under one frame.
[1] C. Cen, et al., Nature Materials 7, 298 (2008).
*JL acknowledges support from the Vannevar Bush Faculty Fellowship program, funded by ONR (N00014-15-1-2847). C-BE acknowledges support from NSF DMREF (DMR-1629270), AFOSR (FA9550-15-1-0334), and AOARD (FA2386-15-1-4046).
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Presenters
Aditi Nethwewala
Department of Physics & Astronomy, University of Pittsburgh
Department of Physics and Astronomy, University of Pittsburgh
Authors
Aditi Nethwewala
Department of Physics & Astronomy, University of Pittsburgh
Department of Physics and Astronomy, University of Pittsburgh
Megan Briggeman
Department of Physics and Astronomy, University of Pittsburgh
Physics and Astronomy, University of Pittsburgh
University of Pittsburgh
Jianan Li
Department of Physics and Astronomy, University of Pittsburgh
Department of Physics, University of Pittsburgh
University of Pittsburgh
Department of Physics & Astronomy, University of Pittsburgh
Physics and Astronomy, University of Pittsburgh
Yuhe Tang
Department of Physics and Astronomy, University of Pittsburgh
Department of Physics & Astronomy, University of Pittsburgh
University of Pittsburgh
Hyungwoo Lee
Department of Materials Science and Engineering, University of Wisconsin–Madison
Department of Materials Science and Engineering, University of Wisconsin-Madison
University of Wisconsin-Madison
Department of Material Science and Engineering, University of Wisconsin-Madison
Materials Science and Engineering, University of Wisconsin-Madison
Materials Science and Engineering, Univ of Wisconsin-Madison
University of Wisconsin–Madison
Jungwoo Lee
Department of Materials Science and Engineering, University of Wisconsin-Madison
University of Wisconsin-Madison
Department of Materials Science and Engineering, University of Wisconsin–Madison
Department of Material Science and Engineering, University of Wisconsin-Madison
Materials Science and Engineering, University of Wisconsin-Madison
Materials Science and Engineering, Univ of Wisconsin-Madison
Chang-Beom Eom
Department of Materials Science and Engineering, University of Wisconsin–Madison
Department of Materials Science and Engineering, University of Wisconsin-Madison
University of Wisconsin-Madison
Department of Material Science and Engineering, University of Wisconsin-Madison
Materials Science and Engineering, University of Wisconsin-Madison
Materials Science and Engineering, Univ of Wisconsin-Madison
University of Wisconsin–Madison
Patrick Irvin
Department of Physics and Astronomy, University of Pittsburgh
Department of Physics, University of Pittsburgh
University of Pittsburgh
Department of Physics & Astronomy, University of Pittsburgh
Physics and Astronomy, University of Pittsburgh
Jeremy Levy
Department of Physics and Astronomy, University of Pittsburgh
Department of Physics, University of Pittsburgh
University of Pittsburgh
Department of Physics & Astronomy, University of Pittsburgh
