Charge-transfer absorption in a dimerized one-dimensional Mott-Hubbard insulator

Journal Article · Wed Nov 15 04:00:00 EST 1978 · Phys. Rev., B: Solid State; (United States)

DOI:https://doi.org/10.1103/PhysRevB.18.5835· OSTI ID:6516012

Lyo, S K

We investigate interband absorption in dimerized one-dimensional Mott-Hubbard insulators, such as some charge-transfer organic salts, using the Hubbard Hamiltonian. The line-shape function is obtained for the antiferromagnetic ground state by exactly summing to infinite order the moments generated by all possible excursions of the particle and the hole in a projected particle-hole space. The effect of spin disordering is also discussed in terms of a numerical evaluation of moments. It is found that the interband absorption arises from transitions to a sharp intradimer excitonic state as well as to extended band states. The former tends to dominate as the dimerization increases.

• Research Organization: Sandia Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 6516012
• Journal Information: Phys. Rev., B: Solid State; (United States), Journal Name: Phys. Rev., B: Solid State; (United States) Vol. 18:10; ISSN PLRBA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656000 -- Condensed Matter Physics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
ANTIFERROMAGNETISM
BAND THEORY
CHEMICAL REACTIONS
DIMERIZATION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HAMILTONIANS
IONIC CONDUCTIVITY
MAGNETISM
MATHEMATICAL OPERATORS
ONE-DIMENSIONAL CALCULATIONS
ORGANIC COMPOUNDS
ORGANIC INSULATORS
PHYSICAL PROPERTIES
POLYMERIZATION
QUANTUM OPERATORS
SALTS
SPECTRA