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Evidence of a Lifshitz transition in the high-pressure behavior of the intermetallic compound $\mathrmAuIn_2$

Physical Review B, Vol. 65 (Apr 2002), 140101, doi:10.1103/physrevb.65.140101  Key: citeulike:11376498

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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.