Anomalous Transverse Resistance at the Interface of (111) (La<sub>0.3</sub>Sr<sub>0.7</sub>)(Al<sub>0.65</sub>Ta<sub>0.35</sub> )O<sub>3</sub> /SrTiO<sub>3</sub> Heterostructures

ORAL

Abstract

A variety of interesting physical phenomenon have been found to live at the interface between complex oxide layers. Significant work has been done to characterize the electrical transport properties of the two dimensional conducting gases present in systems like LaAlO3 (LAO)/ SrTiO3 (STO). Recently, (La0.3Sr0.7)(Al0.65Ta0.35)O3 (LSAT) /STO has been investigated due to improved lattice matching when compared to LAO/STO, and interesting effects due to strong spin orbit interactions1,2. Here we report an anomalous transverse resistance observed in Hall bars at the interface of (111) oriented LSAT/STO. This effect does not track with low field Hall coefficient, nor longitudinal resistance over temperatures from 4 K to 70 K. We discuss these findings in the context of similar effects seen in La2-xSrxCuO4 (LSCO)/STO and LAO/STO systems3,4.

[1] Bal et al., Phys Rev B. 98, 085416 (2018)
[2] Bal et al., Phys Rev B. 99, 035408 (2019)
[3] Wu et al., J. of Supercon Novel Magn. 32:1623-1628 (2019)
[4] Davis et al., Phys Rev B. 98, 024504 (2018)

*US DOE Grant No. DE-FG02-06ER46346

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Presenters

  • Patrick Krantz

    • Northwestern University

Authors

  • Patrick Krantz

    • Northwestern University

  • Venkat Chandrasekhar

    • Northwestern University

  • Zhen Huang

    • Department of Physics, National University of Singapore

  • Kun Han

    • Department of Physics, National University of Singapore

  • Ariando Ariando

    • Department of Physics, National University of Singapore

  • Thirumalai Venkatesan

    • Natl Univ of Singapore
    • Department of Physics, National University of Singapore