Surface Charge-Density Wave on the One-Dimensional Organic Conductor β(BEDTTTF)2PF6

Masahiko Ishida, Takehiko Mori, and Hidemi Shigekawa
Phys. Rev. Lett. 83, 596 – Published 19 July 1999
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Abstract

We performed STM and theoretical studies of the surface of β(BEDTTTF)2PF6 which is known to show a metal-insulator transition at 297 K with the nesting vector of Qbulk=a*+0.5c* as a bulk phase. Two typical charge-density wave (CDW) phases with QS1=0.13a*+0.26c* and QS2=0.19a*+0.20c* were observed at 285 K on the surface. The observed structures were correlated well with the analysis of the susceptibility χ(Q), given the incomplete surface-charge transfer in the polar surface of this material. This is the first observation of surface CDW phases that reflect the characteristics of the electronic structure. These results suggest the possible discovery of other surface properties, such as surface superconductivity, in organic materials with a polar surface.

  • Received 2 April 1999

DOI:https://doi.org/10.1103/PhysRevLett.83.596

©1999 American Physical Society

Authors & Affiliations

Masahiko Ishida1, Takehiko Mori2, and Hidemi Shigekawa1,3,*

  • 1Institute of Applied Physics, CREST, Japan Science and Technology Corporation (JST), University of Tsukuba, Tsukuba 305-8573, Japan
  • 2Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Tokyo 152-8552, Japan
  • 3Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, Hongo, Tokyo 113-8656, Japan

  • *Email address: hidemi@ims.tsukuba.ac.jp(http://dora.ims.tsukubas.ac.jp)

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Vol. 83, Iss. 3 — 19 July 1999

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