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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)

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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