Entropy driven dimerization in a one-dimensional spin-orbital model

Physical Review B - Condensed Matter and Materials Physics

Volumn 67, Issue 10, 2003, Pages

  Sirker, J ^a   Khaliullin, G ^b,c  

^a TU DORTMUND UNIVERSITY   (Germany)

^b MAX PLANCK INSTITUT FÜR FESTKÖRPERFORSCHUNG   (Germany)

^c ZAVOISKY PHYSICAL TECHNICAL INSTITUTE   (Russian Federation)

Author keywords

[No Author keywords available]

Indexed keywords

VANADIC ACID;

ACCELERATION; ARTICLE; CALCULATION; DIMERIZATION; ELECTRONICS; ENTROPY; MATHEMATICAL ANALYSIS; MODEL; PHYSICS; TEMPERATURE;

EID: 0038079481     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.67.100408     Document Type: Article

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20. The origin of the factor 1/2 can be understood as follows: The elementary excitations are orbital “spinons” each with a gap Δ, but they always appear in pairs so that (formula presented) In the thermodynamic data the activated behavior is characterized by the energy (formula presented) of an elementary excitation irrespective of whether these excitations appear in pairs or not.