Lifshitz transitions and elastic properties of Osmium under pressure

Abstract

Topological changes of the Fermi surface under pressure may cause anomalies in the low-temperature elastic properties. Our density functional calculations for elemental Osmium evidence that this metal undergoes three such Lifshitz transitions in the pressure range between 70 GPa and 130 GPa. The related elastic anomalies are, however, invisibly weak. The critical pressures considerably exceed the values for recently measured and calculated anomalies in the pressure (P) dependence of the hexagonal c/a lattice parameter ratio close to 25 GPa. We demonstrate that the latter anomalies are statistically not significant and that (c/a)(P) can be fitted equally well by a smooth dependence.

8 pages, 8 figures

References in corpus (2)

• Absence of lattice strain anomalies at the electronic topological transition in zinc at high pressure
• Magnetic-field induced band-structure change in CeBiPt

Cited by in corpus (4)

• Electronic topological transition and non-collinear magnetism in compressed hcp Co
• Shape resonance at a Lifshitz transition for high temperature superconductivity in multiband superconductors
• Lifshitz Transitions in 122-Pnictides Under Pressure
• High pressure and temperature thermoelasticity of hcp osmium from ab initio quasi-harmonic theory