Dresden 2006 – wissenschaftliches Programm

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MM: Metall- und Materialphysik

MM 22: Electronic Properties II

MM 22.6: Vortrag

Mittwoch, 29. März 2006, 15:15–15:30, IFW A

Lifshitz-transitions in Osmium under pressure — •Daniela Koudela, Klaus Koepernik, Ulrike Nitzsche, and Manuel Richter — IFW Dresden

The search for Lifshitz-transitions [1] is a recent subject of interest. Occelli et al. claimed, that they found evidence for a Lifshitz-transition in Osmium [2]. To explore this hypothesis from the theoretical side, we did very accurate first principle calculations applying the DFT-based bandstructure code FPLO [3]. From the resulting bandstructure, Fermi surfaces, and total energies we conclude, that Osmium undergoes three Lifshitz-transitions in the pressure range between 0 GPa and 150 GPa, which should be invisible in the elastic properties.

[1] I.M. Lifshitz, Zh. Eksp. Teor. Fiz. 38, 1569 [Sov. Phys. JETP 11, 1130 (1960)].

[2] F. Occelli, D.L. Farber, J. Badro, C.M. Aracne, D.M. Teter, M. Hanfland, B. Canny and B. Couzinet, Phys. Rev. Lett. 93, 095502 (2004).

[3] K. Koepernik and H. Eschrig, Phys. Rev. B 59, 1743 (1999); www.fplo.de.