Quantum oscillation signatures of the Bloch-Grüneisen temperature in the Dirac semimetal ZrTe5,Physical Review B

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Quantum oscillation signatures of the Bloch-Grüneisen temperature in the Dirac semimetal ZrTe5
Physical Review B ( IF 3.2 ) Pub Date : 2024-09-10 , DOI: 10.1103/physrevb.110.l121103
S. Galeski _{1,

2} , K. Araki ₃ , O. K. Forslund _{4,

5} , R. Wawrzyńczak ₆ , H. F. Legg ₇ , P. K. Sivakumar ₈ , U. Miniotaite ₉ , F. Elson ₉ , M. Månsson ₉ , C. Witteveen ₁₀ , F. O. von Rohr ₁₀ , A. Q. R. Baron ₁₁ , D. Ishikawa ₁₁ , Q. Li ₁₂ , G. Gu ₁₂ , L. X. Zhao _{13,

14,

15} , W. L. Zhu _{13,

15,

16} , G. F. Chen _{13,

14,

15} , Y. Wang ₁₃ , S. S. P. Parkin ₈ , D. Grobunov ₂ , S. Zherlitsyn ₂ , B. Vlaar ₁₇ , D. H. Nguyen ₁₇ , S. Paschen ₁₇ , P. Narang ₁₈ , C. Felser ₇ , J. Wosnitza _{19,

19} , T. Meng ₁₉ , Y. Sassa ₂₀ , S. A. Hartnoll ₂₁ , J. Gooth _{1,

6}

Affiliation

Universität Bonn
Helmholtz-Zentrum Dresden-Rossendorf
National Defense Academy
Universität Zurich
Uppsala University
Max Planck Institute for Chemical Physics of Solids
University of Basel
Max Planck Institute of Microstructure Physics
KTH Royal Institute of Technology
University of Geneva
SPring-8
Brookhaven National Laboratory
Institute of Physics, Chinese Academy of Sciences
Songshan Lake Materials Laboratory
University of Chinese Academy of Sciences
Shaanxi Normal University
TU Wien
University of California, Los Angeles
Technische Universität Dresden
Chalmers University of Technology
University of Cambridge

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

{ZrTe}_{5}

. 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

T^{5}

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.

中文翻译：

狄拉克半金属 ZrTe5 中 Bloch-Grüneisen 温度的量子振荡特征

电子-声子相互作用在很多方面都是量子电动力学的固态等价物。 EP 耦合始终存在，它决定了金属在有限温度下的固有电阻，使其成为固体中存在的最基本的相互作用之一。在典型金属中，不同的 ep 散射范围由特征声子能级（德拜温度）分隔。然而，在具有非常小的费米表面的金属中，出现了一个新的尺度——布洛赫-格吕内森温度。在这个温度下，平均声子动量与电子的费米动量相当。在这里，我们报告了狄拉克半金属的亚开尔文输运和声音传播实验