Phase transitions driven by quasiparticle interactions

March, N. H., Chulkov, E. V., Echenique, P. M. and Matthai, Clarence Cherian 2010. Phase transitions driven by quasiparticle interactions. Phase Transitions 83 (12) , pp. 1085-1095. 10.1080/01411594.2010.509641

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Abstract

After a survey of the solid–liquid transition, driven by phonon–phonon interactions, attention is next focussed on two phase transitions caused by electron–phonon interactions. These are (i) the Barden–Cooper–Schrieffer pure metal superconducting transition and (ii) the original Peierls instability. These have closely similar forms for the respective transition temperatures, both being related to energy gaps. Spin–phonon interactions are then discussed in relation to spin-Peierls materials. Finally, magnon–magnon interactions are treated in the context of the ferromagnetic–paramagnetic transition in the itinerant electron systems Fe, Co and Ni. Heuristic and phenomenological arguments, plus of course experiment, provide the basis for the conclusions drawn here.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Uncontrolled Keywords:	Phase transitions ; Quasiparticle interactions ; Energy gaps
Publisher:	Taylor and Frqancis
ISSN:	0141-1594
Last Modified:	04 Jun 2017 02:00
URI:	https://orca.cardiff.ac.uk/id/eprint/7327

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