Dresden 2003 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 20: Postersitzung IV (Mesoskopische Systeme, Supraleitung: Massivmaterialien, Bandleiter, Pinning, Vortexdynamik, Transporteigenschaften, Korngrenzen)

TT 20.54: Poster

Donnerstag, 27. März 2003, 14:30–19:00, P2c, P2d

Prominent quasi-particle peak in the photoemission spectrum of the metallic phase of V₂O₃ — •Georg Keller¹, Karsten Held², Volker Eyert¹, Vladimir I. Anisimov³, and Dieter Vollhardt¹ — ¹Theoretische Physik III, Institut für Physik, Universität Augsburg, 86135 Augsburg — ²Max Planck Institut für Festkörperforschung, 70569 Stuttgart — ³Institut für Metallphysik, Ekaterinburg GSP-170, Russland

The paramagnetic phase of V₂O₃ is investigated using the computational scheme LDA+DMFT. New CPU-intensive quantum Monte-Carlo simulations at lower temperatures than previously [1], i.e. T = 300 K, show that a prominent quasi-particle peak in the photoemission spectrum develops. This result is found to be in good general agreement with the distinct peak that has recently been observed in high-energy bulk-sensitive photoemission spectroscopy measurements at the Spring8 beamline in Japan [2].

[1] K. Held, G. Keller, V. Eyert, V.I. Anisimov, and D. Vollhardt, Phys. Rev. Lett. 86, 5345 (2001)

[2] S.-K. Mo et al., unpublished