Collective behavior of field induced spin density waves in bechgaard salts

A. Virosztek, Kazumi Maki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Within a model of quasi-two dimensional electron system interacting via on site Coulomb potential we study theoretically the collective behavior of the field induced spin density waves (FISDW) in Bechgaard salts. In a FISDW there are two gapless modes associated with the spin rotation around the external magnetic field and the sliding of the FISDW. These gapless modes cancel exactly the anomaly due to the modification of the quasi-particle spectrum below Tc in the correlation functions like , and where S3, n and jx are the spin parallel to the external field, the electron density and the electron current parallel to the chain direction. The low frequency behavior of these correlation functions are unchanged at the FISDW transition when the quasi-particle damping is ignored. However, the rotational symmetry of the spin is broken by the dipole energy which gives rise to a small energy gap in the longitudinal spin wave spectrum below Tc, which is accessible to the electron spin resonance. Furthermore the translational invariance of the SDW is in general broken by impurities and/or crystalline defects, which gives rise to the SDW pinning. Then the resulting expression of and resembles to those in a CDW in quasi-one dimensional conductors. Therefore we predict similar nonlinear conductivity in the presence of electric field and electromechanical effects as found in the CDW systems.

Original languageEnglish
Pages (from-to)585
Number of pages1
JournalJapanese Journal of Applied Physics
Volume26
Issue numberS3-1
DOIs
Publication statusPublished - 1987

Fingerprint

Spin density waves
Salts
salts
Spin waves
elementary excitations
Electrons
Invariance
Carrier concentration
Paramagnetic resonance
Energy gap
Damping
Electric fields
Impurities
Magnetic fields
Crystalline materials
Defects
Coulomb potential
magnons
sliding
invariance

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Collective behavior of field induced spin density waves in bechgaard salts. / Virosztek, A.; Maki, Kazumi.

In: Japanese Journal of Applied Physics, Vol. 26, No. S3-1, 1987, p. 585.

Research output: Contribution to journalArticle

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