Spin-crossover-induced Mott transition and the other scenarios of metallization in 3d[superscript n] metal compounds

Journal Article · Wed Apr 08 04:00:00 EDT 2009 · Phys. Rev. B

DOI:https://doi.org/10.1103/PhysRevB.79.085125· OSTI ID:1005546

Lyubutin, I S; Ovchinnikov, S G; Gavriliuk, A G; Struzhkin, V V

A different 'Hubbard energy control' mechanism of the insulator-metal transition (IMT) in Mott-Hubbard insulators is discussed. This mechanism can be initiated by the lattice compression and it is driven by a spin crossover of 3d{sup 5} ions from the high-spin state to the low-spin state. The spin crossover suppresses the effective Hubbard parameter U{sub eff} down to the value enabling the insulator-metal transition according to the Mott mechanism U{sub eff}/W{approx}1. The classification of possible scenarios of metallization in the other 3d{sup n} metal compounds is also performed.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: USDOE
• OSTI ID: 1005546
• Journal Information: Phys. Rev. B, Journal Name: Phys. Rev. B Journal Issue: (8) ; 2009 Vol. 79; ISSN 1098-0121
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CLASSIFICATION
COMPRESSION
CONTROL
ENERGY
HIGH SPIN STATES
IONS
METALS
SPIN