Fermi surface of AuSb2. I. High-field galvanomagnetic effects

Research output: Contribution to journalArticle

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Abstract

High-field galvanomagnetic effects have been investigated in the pyrite structure metallic compound AuSb2 in fields up to 150 kG. The resistance ratios of the samples [ρ(295°K)ρ(4.2°K)] were as high as 520. The results indicate that AuSb2 is a compensated metal and that its Fermi surface supports open orbits in 100, 110, and 112 directions. At fields higher than about 50 kG, the tendency toward saturation caused by the open orbits changes to a field dependence approaching quadratic, and rather large-amplitude quantum oscillations in the magnetoresistance appear. This behavior is explicable in terms of a loss of the open orbits in the highest fields as a result of magnetic breakdown. An approximate calculation based on the theory of magnetic breakdown gives a value of 85 meV for the size of the energy gaps involved in the breakdown.

Original languageEnglish (US)
Pages (from-to)1273-1284
Number of pages12
JournalPhysical Review B
Volume1
Issue number4
DOIs
StatePublished - Jan 1 1970
Externally publishedYes

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galvanomagnetic effects
Galvanomagnetic effects
Fermi surface
Fermi surfaces
Orbits
breakdown
orbits
Metallic compounds
Pyrites
pyrites
Magnetoresistance
tendencies
Energy gap
Metals
saturation
oscillations
metals

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Fermi surface of AuSb2. I. High-field galvanomagnetic effects. / Ahn, J.; Sellmyer, David J.

In: Physical Review B, Vol. 1, No. 4, 01.01.1970, p. 1273-1284.

Research output: Contribution to journalArticle

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