Commensurate and incommensurate states of a spin-Peierls system in a magnetic field

Isao Harada, Akio Kotani

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Abstract

Commensurate and incommensurate states of a Heisenberg spin-Peierls system in a magnetic field are studied within the mean-field approximation. Free energy, order parameter and magnetization are calculated numerically by taking account of the effect of all the accompanying harmonics. In particular, it is found that at low temperatures the field lowers the free energy of the incommensurate states and results in the commensurate to incommensurate phase transition. The nature of this transition is discussed. It is also found that the incommensurate to normal phase transition temperature behaves anomalously in a strong field. The resultant phase diagram is compared with the experimental data on TTF-CuBDT.

Original languageEnglish
Pages (from-to)1737-1744
Number of pages8
JournalJournal of the Physical Society of Japan
Volume51
Issue number6
Publication statusPublished - Jun 1982
Externally publishedYes

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free energy
magnetic fields
transition temperature
phase diagrams
harmonics
magnetization
approximation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Commensurate and incommensurate states of a spin-Peierls system in a magnetic field. / Harada, Isao; Kotani, Akio.

In: Journal of the Physical Society of Japan, Vol. 51, No. 6, 06.1982, p. 1737-1744.

Research output: Contribution to journalArticle

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