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Front Cover: Mott–Hubbard transition in V 2 O 3 revisited (Phys. Status Solidi B 7/2013)
Author(s) -
Hansmann P.,
Toschi A.,
Sangiovanni G.,
SahaDasgupta T.,
Lupi S.,
Marsi M.,
Held K.
Publication year - 2013
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201370546
Subject(s) - isostructural , mott transition , condensed matter physics , paramagnetism , transition metal , metal–insulator transition , mott insulator , lattice (music) , physics , materials science , hubbard model , metal , chemistry , crystallography , superconductivity , crystal structure , biochemistry , acoustics , catalysis , metallurgy
Among the family of correlated electron systems, vanadium sesquioxide V 2 O 3 has undergone a remarkable career. Its isostructural metal–insulator transition upon doping with Cr is the textbook example of a Mott–Hubbard transition between a paramagnetic metal and a paramagnetic insulator. However, after first theoretical interpretations with very simple models it became clear that the physics of V 2 O 3 were deeper than anticipated. Specifically, orbital degrees of freedom and their coupling to the lattice are key elements to understand the material close to the above mentioned transition. In their Feature Article on pp. 1251–1264 , Hansmann et al. review recent progress in experimental and theoretical understanding of V 2 O 3 featuring specially resolved spectroscopic images. The cover picture shows the material close to the transition where metallic clouds (red) have already condensed in the insulating “sky”.