TY - JOUR
T1 - Orbitally induced Peierls state in spinels
AU - Khomskii, D. I.
AU - Mizokawa, T.
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2005/4/22
Y1 - 2005/4/22
N2 - We consider the superstructures, which can be formed in spinels containing on B sites the transition-metal ions with partially filled t2g levels. We show that, when such systems are close to the itinerant state (e.g., have an insulator-metal transition), there may appear in them an orbitally driven Peierls state. We explain by this mechanism the very unusual superstructures observed in CuIr2S4 (octamers) and MgTi2O4 (chiral superstructures) and suggest that a similar phenomenon should be observed in NaTiO2 and possibly in some other systems.
AB - We consider the superstructures, which can be formed in spinels containing on B sites the transition-metal ions with partially filled t2g levels. We show that, when such systems are close to the itinerant state (e.g., have an insulator-metal transition), there may appear in them an orbitally driven Peierls state. We explain by this mechanism the very unusual superstructures observed in CuIr2S4 (octamers) and MgTi2O4 (chiral superstructures) and suggest that a similar phenomenon should be observed in NaTiO2 and possibly in some other systems.
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U2 - 10.1103/PhysRevLett.94.156402
DO - 10.1103/PhysRevLett.94.156402
M3 - Article
AN - SCOPUS:18244394824
SN - 0031-9007
VL - 94
JO - Physical Review Letters
JF - Physical Review Letters
IS - 15
M1 - 156402
ER -