Evidence of a Lifshitz transition in the high-pressure behavior of the intermetallic compound AuIn2

B. K. Godwal; S. Meenakshi; P. Modak; R. S. Rao; S. K. Sikka; V. Vijayakumar; E. Bussetto; A. Lausi

doi:10.1103/PhysRevB.65.140101

Evidence of a Lifshitz transition in the high-pressure behavior of the intermetallic compound AuIn₂

B. K. Godwal, S. Meenakshi, P. Modak, R. S. Rao, S. K. Sikka, V. Vijayakumar, E. Bussetto, A. Lausi

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Accurate equation of state of AuIn₂ was obtained by x-ray diffraction measurements with ELETTRA synchrotron source to pressures over 20 GPa. Below 5 GPa, the P-V data when transformed to universal equation of state (UEOS), shows a deviation from linearity, confirming an electronic transition, consistent with the anomaly observed earlier in fusion and electrical data. The present high-resolution data also reaffirm a structural phase transition beyond 9 GPa. Full potential electronic band-structure calculations reveal a Lifshitz transition at the observed anomaly in the UEOS. Its transition pressure was found to be sensitive to the exchange-correlation terms.

Original language	English
Article number	140101
Pages (from-to)	1401011-1401014
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	65
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.65.140101
State	Published - 1 Apr 2002
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Evidence of a Lifshitz transition in the high-pressure behavior of the intermetallic compound AuIn2",

abstract = "Accurate equation of state of AuIn2 was obtained by x-ray diffraction measurements with ELETTRA synchrotron source to pressures over 20 GPa. Below 5 GPa, the P-V data when transformed to universal equation of state (UEOS), shows a deviation from linearity, confirming an electronic transition, consistent with the anomaly observed earlier in fusion and electrical data. The present high-resolution data also reaffirm a structural phase transition beyond 9 GPa. Full potential electronic band-structure calculations reveal a Lifshitz transition at the observed anomaly in the UEOS. Its transition pressure was found to be sensitive to the exchange-correlation terms.",

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AU - Godwal, B. K.

AU - Meenakshi, S.

AU - Modak, P.

AU - Rao, R. S.

AU - Sikka, S. K.

AU - Vijayakumar, V.

AU - Bussetto, E.

AU - Lausi, A.

PY - 2002/4/1

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AB - Accurate equation of state of AuIn2 was obtained by x-ray diffraction measurements with ELETTRA synchrotron source to pressures over 20 GPa. Below 5 GPa, the P-V data when transformed to universal equation of state (UEOS), shows a deviation from linearity, confirming an electronic transition, consistent with the anomaly observed earlier in fusion and electrical data. The present high-resolution data also reaffirm a structural phase transition beyond 9 GPa. Full potential electronic band-structure calculations reveal a Lifshitz transition at the observed anomaly in the UEOS. Its transition pressure was found to be sensitive to the exchange-correlation terms.

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Evidence of a Lifshitz transition in the high-pressure behavior of the intermetallic compound AuIn₂

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