Observation of ultrafast photoinduced closing and recovery of the spin-density-wave gap in (TMTSF ) 2 PF6

Shinichi Watanabe, Ryusuke Kondo, Seiichi Kagoshima, Ryo Shimano

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Photoexcited dynamics of a spin-density-wave (SDW) state in an organic linear-chain compound bis-(tetramethyl-tetraselenafulvalene)hexafluorophosphate, (TMTSF) 2 PF6, is investigated by optical pump and terahertz probe experiments. After the ultrashort laser-pulse excitation, a sudden closing followed by a recovery of the SDW gap is clearly observed in the far-infrared spectrum. The recovery time is found to diverge toward the phase-transition temperature, TSDW, while the gap remains open at TSDW. The observed critical slowing down behavior is interpreted in terms of three-dimensional fluctuation which enlarges near the phase-transition temperature.

Original languageEnglish
Article number220408
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number22
DOIs
Publication statusPublished - 2009 Dec 17
Externally publishedYes

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Spin density waves
closing
Superconducting transition temperature
Phase transitions
recovery
transition temperature
Recovery
Ultrashort pulses
infrared spectra
Pumps
pumps
Infrared radiation
probes
pulses
excitation
lasers
Experiments

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Observation of ultrafast photoinduced closing and recovery of the spin-density-wave gap in (TMTSF ) 2 PF6. / Watanabe, Shinichi; Kondo, Ryusuke; Kagoshima, Seiichi; Shimano, Ryo.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 80, No. 22, 220408, 17.12.2009.

Research output: Contribution to journalArticle

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