Quantum oscillation signatures of the Bloch-Grüneisen temperature in the Dirac semimetal ZrTe5
Journal article, 2024
The electron-phonon interaction is in many ways a solid state equivalent of quantum electrodynamics. Being always present, the e-p coupling is responsible for the intrinsic resistance of metals at finite temperatures, making it one of the most fundamental interactions present in solids. In typical metals, different regimes of e-p scattering are separated by a characteristic phonon energy scale - the Debye temperature. However, in metals harboring very small Fermi surfaces a new scale emerges - the Bloch-Grüneisen temperature. This is a temperature at which the average phonon momentum becomes comparable to the Fermi momentum of the electrons. Here we report sub-Kelvin transport and sound propagation experiments on the Dirac semimetal ZrTe5. The combination of the simple band structure with only a single small Fermi surface sheet allowed us to directly observe the Bloch-Grüneisen temperature and its consequences on electronic transport of a 3D metal in the limit where the small size of the Fermi surface leads to effective restoration of translational invariance of free space. Our results indicate that on entering this hydrodynamic transport regime, the viscosity of the Dirac electronic liquid undergoes an anomalous increase beyond the theoretically predicted T5 temperature dependence. Extension of our measurements to strong magnetic fields reveal that, despite the dimensional reduction of the electronic band structure, the electronic liquid retains characteristics of the zero-field hydrodynamic regime up to the quantum limit. This is vividly reflected by an anomalous suppression of the amplitude of quantum oscillations seen in the Shubnikov-de Haas effect.
Author
S. Galeski
Helmholtz
University of Bonn
K. Araki
National Defense Academy of Japan
Ola Kenji Forslund
University of Zürich
Uppsala University
R. Wawrzyńczak
Max Planck Society
H. F. Legg
University of Basel
P. K. Sivakumar
Max Planck Society
Ugne Miniotaite
Royal Institute of Technology (KTH)
Frank Elson
Royal Institute of Technology (KTH)
Martin Månsson
Royal Institute of Technology (KTH)
C. Witteveen
University of Geneva
F. O. von Rohr
University of Geneva
A. Q.R. Baron
Japan Synchrotron Radiation Research Institute (JASRI)
D. Ishikawa
Japan Synchrotron Radiation Research Institute (JASRI)
Q. Li
Brookhaven National Laboratory
G. Gu
Brookhaven National Laboratory
L. X. Zhao
Chinese Academy of Sciences
Songshan Lake Materials Laboratory
W. L. Zhu
Chinese Academy of Sciences
Shaanxi Normal University
G. F. Chen
Songshan Lake Materials Laboratory
Chinese Academy of Sciences
Y. Wang
Chinese Academy of Sciences
S. S.P. Parkin
Max Planck Society
D. Grobunov
Helmholtz
S. Zherlitsyn
Helmholtz
B. Vlaar
Vienna University of Technology
D. H. Nguyen
Vienna University of Technology
S. Paschen
Vienna University of Technology
Prineha Narang
University of California
C. Felser
University of Basel
J. Wosnitza
Technische Universität Dresden
Tobias Meng
Technische Universität Dresden
Yasmine Sassa
Chalmers, Physics, Materials Physics
Sean A. Hartnoll
Faculty of Mathematics
J. Gooth
Max Planck Society
University of Bonn
Physical Review B
2469-9950 (ISSN) 2469-9969 (eISSN)
Vol. 110 12 L121103European Microkelvin Platform (EMP)
European Commission (EC) (EC/H2020/824109), 2019-01-01 -- 2022-12-31.
Subject Categories
Condensed Matter Physics
DOI
10.1103/PhysRevB.110.L121103