Measurement of the Planckian scattering rate

ORAL

Abstract

Perfectly T-linear resistivity is observed in a variety of strongly correlated metals close to a quantum critical point [1] and has been attributed to a scattering rate 1/τ of charge carriers that reaches the Planckian limit [2,3], with hbar/τ = α kBT where α is of order unity. While this relationship is often inferred from simple estimates, a T-linear scattering rate has yet to be measured.
To directly access the Planckian scattering rate, we measured the angle-dependent magnetoresistance (ADMR) of Nd-LSCO at p = 0.24: a cuprate that demonstrates T-linear resistivity over a wide temperature range at the pseudogap critical point p* [4]. The ADMR reveals a well-defined Fermi surface that precisely agrees with ARPES [5]. In addition, we extract a T-linear scattering rate that has the Planckian value, namely α = 1.4 ± 0.3. Remarkably, this inelastic scattering rate is isotropic.
Our findings suggest that T-linear resistivity in strange metals emerges from a generic isotropic, momentum-independent inelastic scattering rate that reaches the Planckian limit.
[1] J. Zaanen, SciPost Phys. 6, 061 (2019).
[2] J. A. N. Bruin et al., Science 339, 804 (2013)
[3] A. Legros et al., Nat. Phys. 15, 142 (2019)
[4] R. Daou et al., Nat. Phys. 5, 31 (2009).
[5] C. Matt et al., Phys. Rev. B 92, 134524 (2015)

–

Presenters

  • Gael Grissonnanche

    • Institut Quantique, Département de physique & RQMP, Université de Sherbrooke
    • Universite de Sherbrooke (Canada)
    • Universite de Sherbrooke
    • Cornell University

Authors

  • Gael Grissonnanche

    • Institut Quantique, Département de physique & RQMP, Université de Sherbrooke
    • Universite de Sherbrooke (Canada)
    • Universite de Sherbrooke
    • Cornell University

  • Yawen Fang

    • Cornell University

  • Anaelle Legros

    • Johns Hopkins University
    • Universite de Sherbrooke
    • Université de Sherbrooke

  • Simon Verret

    • Universite de Sherbrooke
    • Physics and Institut quantique, Université de Sherbrooke
    • Université de Sherbrooke

  • Francis Laliberte

    • Institut Quantique, Département de physique & RQMP, Université de Sherbrooke
    • Universite de Sherbrooke (Canada)
    • Universite de Sherbrooke
    • Université de Sherbrooke

  • Clement Collignon

    • Universite de Sherbrooke
    • Physics, Massachusetts Institute of Technology
    • Université de Sherbrooke

  • Amirreza Ataei

    • Institut Quantique, Département de physique & RQMP, Université de Sherbrooke
    • Universite de Sherbrooke (Canada)
    • Universite de Sherbrooke
    • Université de Sherbrooke

  • Maxime Dion

    • Universite de Sherbrooke (Canada)
    • Universite de Sherbrooke
    • Université de Sherbrooke

  • Jianshi Zhou

    • University of Texas at Austin
    • Materials Science and Engineering Program, Department of Mechanical Engineering, University of Texas at Austin
    • University of Texas (Austin, USA)
    • University of Texas
    • Texas Materials Institute, University of Texas at Austin
    • Materials Science and Engineering Program, Mechanical Engineering, University of Texas at Austin

  • David E Graf

    • National High Magnetic Field Laboratory
    • Florida State University
    • National High Magnetic Field Lab, Florida State University
    • National High Magnetic Field Laboratory, Tallahassee and Florida State University
    • National High Magnetic Field Laboratory, Florida State University
    • National High Magnetic Field Laboratory (FSU)
    • Department of Physics, Florida State University
    • National High Magnetic Field Laboratory and Department of Physics, Florida State University
    • National High Magnetic Field Lab
    • National High Magnetic Field Laboratory, Tallahassee, FL
    • CMS, National High Magnetic Laboratory

  • Michael Lawler

    • Physics, Cornell University
    • Department of Physics, Applied Physics, and Astronomy, Binghamton University
    • Cornell University
    • Binghamton University

  • Paul Goddard

    • Department of Physics, University of Warwick
    • University of Warwick
    • Physics, University of Warwick

  • Louis Taillefer

    • Institut Quantique, Département de physique & RQMP, Université de Sherbrooke
    • Universite de Sherbrooke (Canada)
    • Universite de Sherbrooke
    • Université de Sherbrooke

  • Brad Ramshaw

    • Cornell University
    • Physics, Cornell University