Static versus dynamical mean-field theory of Mott antiferromagnets

G. Sangiovanni, A. Toschi, E. Koch, K. Held, M. Capone, C. Castellani, O. Gunnarsson, S.-K. Mo, J. W. Allen, H.-D. Kim, A. Sekiyama, A. Yamasaki, S. Suga, and P. Metcalf

Phys. Rev. B 73, 205121 – Published 31 May 2006; Erratum Phys. Rev. B 76, 159905 (2007)

Abstract

Studying the antiferromagnetic phase of the Hubbard model by dynamical mean-field theory, we observe striking differences with static (Hartree-Fock) mean field: The Slater band is strongly renormalized and spectral weight is transferred to spin-polaron sidebands. Already for intermediate values of the interaction $U$ the overall bandwidth is larger than in the Hartree-Fock mean field and the gap is considerably smaller. Such differences survive any renormalization of $U$ . Our photoemission experiments for Cr-doped $V_{2} O_{3}$ show spectra qualitatively well described by dynamical mean-field theory.

Received 2 February 2006

DOI:https://doi.org/10.1103/PhysRevB.73.205121

Erratum

Erratum: Static versus dynamical mean-field theory of Mott antiferromagnets [Phys. Rev. B 73, 205121 (2006)]

G. Sangiovanni, A. Toschi, E. Koch, K. Held, M. Capone, C. Castellani, O. Gunnarsson, S.-K. Mo, J. W. Allen, H.-D. Kim, A. Sekiyama, A. Yamasaki, S. Suga, and P. Metcalf

Phys. Rev. B 76, 159905 (2007)

Authors & Affiliations

G. Sangiovanni¹, A. Toschi¹, E. Koch², K. Held¹, M. Capone^3,4, C. Castellani⁴, O. Gunnarsson¹, S.-K. Mo⁵, J. W. Allen⁵, H.-D. Kim⁶, A. Sekiyama⁷, A. Yamasaki⁷, S. Suga⁷, and P. Metcalf⁸

¹Max-Planck Institut für Festkörperforschung, Heisenbergstr. 1, D-70569 Stuttgart, Germany
²Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany
³INFM-SMC and Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Via dei Taurini 19, I-00185 Roma, Italy
⁴Dipartimento di Fisica Università di Roma “La Sapienza” piazzale Aldo Moro 5, I-00185 Roma, Italy
⁵Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
⁶Pohang Accelerator Laboratory, Pohang 790-784, Korea
⁷Department of Material Physics, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
⁸Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA

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Vol. 73, Iss. 20 — 15 May 2006

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