Spectroscopic study of stripe pattern formation induced by current injection in a charge-transfer complex

Y. Okimoto, R. Kumai, E. Saitoh, M. Izumi, S. Horiuchi, Y. Tokura

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

A stripe pattern with a spacing of a few micrometers is observed to show up on the crystal surface of a potassium 7,7′,8,8′- tetracyanoquinodimethane (K-TCNQ) upon the current-induced local insulator-metal transition. The spatially resolved reflectivity and Raman spectroscopies have shown that the stripe is a consequence of periodic phase separation with alternate dimerized and less-dimerized domains in the TCNQ stacks. The periodic modulation of the electronic state is generated in order to minimize the energy of the lattice strain, arising from the current-induced relaxation of the Peierls distortion.

Original languageEnglish
Article number115104
Pages (from-to)115104-1-115104-6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number11
DOIs
Publication statusPublished - 2004 Sep

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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