Signatures of a magnetic-field-induced Lifshitz transition in the ultra-quantum limit of the topological semimetal ZrTe5

S. Galeski (), H. F. Legg (), R. Wawrzyńczak, T. Förster, S. Zherlitsyn, D. Gorbunov, M. Uhlarz, P. M. Lozano, Q. Li, G. D. Gu, C. Felser, J. Wosnitza, T. Meng and J. Gooth ()
Additional contact information
S. Galeski: Max Planck Institute for Chemical Physics of Solids
H. F. Legg: University of Basel
R. Wawrzyńczak: Max Planck Institute for Chemical Physics of Solids
T. Förster: Helmholtz-Zentrum Dresden-Rossendorf
S. Zherlitsyn: Helmholtz-Zentrum Dresden-Rossendorf
D. Gorbunov: Helmholtz-Zentrum Dresden-Rossendorf
M. Uhlarz: Helmholtz-Zentrum Dresden-Rossendorf
P. M. Lozano: Brookhaven National Laboratory
Q. Li: Brookhaven National Laboratory
G. D. Gu: Brookhaven National Laboratory
C. Felser: Max Planck Institute for Chemical Physics of Solids
J. Wosnitza: Helmholtz-Zentrum Dresden-Rossendorf
T. Meng: Technische Universität Dresden
J. Gooth: Max Planck Institute for Chemical Physics of Solids

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract The quantum limit (QL) of an electron liquid, realised at strong magnetic fields, has long been proposed to host a wealth of strongly correlated states of matter. Electronic states in the QL are, for example, quasi-one dimensional (1D), which implies perfectly nested Fermi surfaces prone to instabilities. Whereas the QL typically requires unreachably strong magnetic fields, the topological semimetal ZrTe5 has been shown to reach the QL at fields of only a few Tesla. Here, we characterize the QL of ZrTe5 at fields up to 64 T by a combination of electrical-transport and ultrasound measurements. We find that the Zeeman effect in ZrTe5 enables an efficient tuning of the 1D Landau band structure with magnetic field. This results in a Lifshitz transition to a 1D Weyl regime in which perfect charge neutrality can be achieved. Since no instability-driven phase transitions destabilise the 1D electron liquid for the investigated field strengths and temperatures, our analysis establishes ZrTe5 as a thoroughly understood platform for potentially inducing more exotic interaction-driven phases at lower temperatures.

Date: 2022
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DOI: 10.1038/s41467-022-35106-7

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