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High-pressure resistance and equation-of-state anomalies in Zn: a possible Lifshitz transition

Alka B Garg, V Vijayakumar, P Modak, D M Gaitonde, R S Rao, B K Godwal and S K Sikka

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Experimental results on electrical resistance variation with pressure up to 25 GPa are presented for zinc; they reveal the signature of an electronic topological transition. Theoretical estimates based on the results of first-principles band structure calculations corroborate the observed variation of the resistance. The Lifshitz transition, which is hardly observable in experimental PV data, becomes discernible via the equation of state, in the universal as well as in Holzapfel's form. Another anomaly in the measured resistance is also observed around 20 GPa pressure. The resistance variation with pressure exhibits considerable hysteresis.


PACS

64.30.-t Equations of state of specific substances

71.15.-m Methods of electronic structure calculations

71.20.Gj Other metals and alloys

Subjects

Condensed matter: electrical, magnetic and optical

Condensed matter: structural, mechanical & thermal

Dates

Issue 38 (30 September 2002)

Received 18 April 2002

Published 12 September 2002



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