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Quantum Oscillations of Elastic Moduli and Softening of Phonon Modes in Metals

Natalya A. Zimbovskaya
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Abstract

In this paper we present a theoretical analysis of the effect of magnetostriction on quantum oscillations of elastic constants in metals under strong magnetic fields. It is shown that at low temperatures a significant softening of some acoustic modes could occur near peaks of quantum oscillations of the electron density of states (DOS) at the Fermi surface (FS). This effect is caused by a magnetic instability of a special kind, and it can give rise to a lattice instability. We also show that the most favorable conditions for this instability to be revealed occur in metals whose Fermi surfaces include nearly cylindrical segments.

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Natalya A. Zimbovskaya. 2005-03-01. Quantum Oscillations of Elastic Moduli and Softening of Phonon Modes in Metals. https://doi.org/10.1103/physrevb.71.024109

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