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Phys. Rev. Lett. 90, 186403 (2003) [4 pages]

Prominent Quasiparticle Peak in the Photoemission Spectrum of the Metallic Phase of V2O3

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S.-K. Mo1, J. D. Denlinger2, H.-D. Kim3, J.-H. Park4, J. W. Allen1, A. Sekiyama5, A. Yamasaki5, K. Kadono5, S. Suga5, Y. Saitoh6, T. Muro7, P. Metcalf8, G. Keller9, K. Held10, V. Eyert11, V. I. Anisimov12, and D. Vollhardt9
1Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
2Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
3Pohang Accelerator Laboratory, Pohang 790-784, Korea
4Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
5Department of Material Physics, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
6Department of Synchrotron Radiation Research, Japan Atomic Energy Research Institute, SPring-8, Sayo, Hyogo 679-5143, Japan
7Japan Synchrotron Radiation Research Institute, SPring-8, Sayo, Hyogo 679-5143, Japan
8Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA
9Theoretical Physics III, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
10Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
11Theoretical Physics II, University of Augsburg, 86135 Augsburg, Germany
12Institute of Metal Physics, Ekaterinburg GSP-170, Russia

Received 24 November 2002; published 8 May 2003

We present the first observation of a prominent quasiparticle peak in the photoemission spectrum of the metallic phase of V2O3 and report new spectral calculations that combine the local-density approximation with the dynamical mean-field theory (using quantum Monte Carlo simulations) to show the development of such a distinct peak with decreasing temperature. The experimental peak width and weight are significantly larger than in the theory.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.186403
DOI:
10.1103/PhysRevLett.90.186403
PACS:
71.10.–w, 71.30.+h, 79.60.–i
 
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