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Colossal Piezoresistance in Narrow-Gap Eu<sub>5</sub>In<sub>2</sub>Sb<sub>6</sub>

ORAL

Abstract

We report the discovery of a remarkably large piezoresistance in Eu5In2Sb6 single crystals, wherein anisotropic metallic clusters naturally form within a semiconducting matrix due to electronic interactions. Eu5In2Sb6 shows a highly anisotropic piezoresistance, and c-axis pressure of only 0.4 GPa leads to a resistivity drop of more than 99.95% that results in a record bulk gauge factor. Our result not only reveals the role of interactions and phase separation in the realization of colossal piezoresistance, but it also highlights a novel route to multi-functional devices with large responses to both pressure and magnetic field.

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Presenters

  • Sean M Thomas

    Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A., Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA

Authors

  • Sean M Thomas

    Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A., Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA

  • Sujoy Ghosh

    Los Alamos National Laboratory, School of Physics and Applied Physics, Southern Illinois University Carbondale, IL-62901, USA.

  • Christopher A Lane

    Los Alamos National Laboratory

  • Filip Ronning

    Los Alamos Natl Lab, Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A., Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA

  • Eric D Bauer

    Los Alamos Natl Lab, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A., Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA

  • Joe D Thompson

    Los Alamos Natl Lab, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.

  • Jianxin Zhu

    Los Alamos Natl Lab, Los Alamos National Laboratory

  • Priscila Rosa

    Quantum Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, Los Alamos National Laboratory