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RESEARCH PRODUCT

The band structure of double excited states for a linear chain

R Olchawa

subject

PhysicsCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsBethe ansatzBrillouin zoneQuantum mechanicsBounded functionExcited stateQuantum electrodynamicsDispersion relationElectrical and Electronic EngineeringElectronic band structureEigenvalues and eigenvectorsSpin-½

description

Abstract The energy band structure in the case of double excited states of finite spin systems (s= 1 2 ) has been investigated. A geometrical construction based on the Bethe Ansatz method for determining eigenstates has been proposed. The formula for energy spectrum in the center and at the border of Brillouin zone has been obtained. Classification of energy bands has been elaborated on and approximated dispersion law for bounded states given. Some problems with application of the Bethe Ansatz in the case of finite system has been pointed out.

yearjournalcountryeditionlanguage
2000-08-01Physica B: Condensed Matter
https://doi.org/10.1016/s0921-4526(99)01382-4