Fermi surface measurements in layer chalcogenide crystals

S. J. Hillenius; L. E. Delong; R. V. Coleman

doi:10.1016/0378-4363(81)90229-1

Fermi surface measurements in layer chalcogenide crystals

S. J. Hillenius, L. E. Delong, R. V. Coleman

Physics And Astronomy

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3 Scopus citations

Abstract

Quantum oscillations in the frequency range 0.04-8 MG have been observed in the magnetoresistance of single crystals of 4Hb-TaS₂. These have been studied as a function of applied pressure up to 7 kbar. Pressures in this range depress the charge density wave in the trigonal prismatic layers and the effects on the amplitudes and frequencies of the magnetoquantum oscillations have been studied. Application of pressure produces a dramatic reduction of amplitude for most oscillations, and several undergo definite frequency shifts. These effects are interpreted as resulting from a sensitive pressure dependence of the charge density wave gaps which dominate the Fermi surface topology. Magnetic breakdown and interference orbits may also play a role.

Original language	English
Pages (from-to)	123-126
Number of pages	4
Journal	Physica B+C
Volume	105
Issue number	1-3
DOIs	https://doi.org/10.1016/0378-4363(81)90229-1
State	Published - May 1981

Bibliographical note

Funding Information:
The authors wish to acknowledge Estelle Phillips for valuable help on the crystal growth program. Research was supported by the National Science Foundation, Grant DMR7802553.

ASJC Scopus subject areas

General Engineering

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10.1016/0378-4363(81)90229-1

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AU - Delong, L. E.

AU - Coleman, R. V.

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N2 - Quantum oscillations in the frequency range 0.04-8 MG have been observed in the magnetoresistance of single crystals of 4Hb-TaS2. These have been studied as a function of applied pressure up to 7 kbar. Pressures in this range depress the charge density wave in the trigonal prismatic layers and the effects on the amplitudes and frequencies of the magnetoquantum oscillations have been studied. Application of pressure produces a dramatic reduction of amplitude for most oscillations, and several undergo definite frequency shifts. These effects are interpreted as resulting from a sensitive pressure dependence of the charge density wave gaps which dominate the Fermi surface topology. Magnetic breakdown and interference orbits may also play a role.

AB - Quantum oscillations in the frequency range 0.04-8 MG have been observed in the magnetoresistance of single crystals of 4Hb-TaS2. These have been studied as a function of applied pressure up to 7 kbar. Pressures in this range depress the charge density wave in the trigonal prismatic layers and the effects on the amplitudes and frequencies of the magnetoquantum oscillations have been studied. Application of pressure produces a dramatic reduction of amplitude for most oscillations, and several undergo definite frequency shifts. These effects are interpreted as resulting from a sensitive pressure dependence of the charge density wave gaps which dominate the Fermi surface topology. Magnetic breakdown and interference orbits may also play a role.

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Fermi surface measurements in layer chalcogenide crystals

Abstract

Bibliographical note

ASJC Scopus subject areas

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