Magnetoresistance in Quasi-One-Dimensional Weyl Semimetal (TaSe4)2I

Magnetic field effect on linear and nonlinear conductivity in a quasi-one-dimensional Weyl semimetal with a charge density wave (TaSe 4 ) 2 I is studied. Longitudinal magnetoresistance in all known regimes of charge-density wave motion (linear conduction, creep, sliding, “Fröhlich superconductivity”...

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Bibliographic Details
Published in:JETP letters 2020-07, Vol.112 (2), p.88-94
Main Authors: Cohn, I. A., Zybtsev, S. G., Orlov, A. P., Zaitsev-Zotov, S. V.
Format: Article
Language:English
Subjects:
Atomic
Biological and Medical Physics
Biophysics
Charge density waves
Condensed Matter
Ion beams
Magnetic fields
Magnetoresistance
Magnetoresistivity
Metalloids
Molecular
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Information Technology
Solid State Physics
Spintronics
Superconductivity
Waves
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Summary:Magnetic field effect on linear and nonlinear conductivity in a quasi-one-dimensional Weyl semimetal with a charge density wave (TaSe 4 ) 2 I is studied. Longitudinal magnetoresistance in all known regimes of charge-density wave motion (linear conduction, creep, sliding, “Fröhlich superconductivity”) is positive and does not exceed a fraction of per cent. Similar magnetotransport measurements were performed in samples profiled by focused ion beams is such a way that motion of the charge-density wave in them is accompanied by phase slip of the charge-density wave. In such samples, a peak-like non-parabolic negative magnetoresistance is observed in relatively small magnetic fields B ≲ 4 T in the nonlinear conduction regime in both longitudinal and transverse geometries. Our results differ significantly from ones obtained earlier and raise the question concerning conditions for observing the axion anomaly in Weyl semimetals in the Peierls state.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364020140040