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Journal of Low Temperature Physics

, Volume 142, Issue 3–4, pp 355–360 | Cite as

Role of frustration in quasi 1D conductor — Charge ordering and/or CDW in (R1,R2-DCNQI)2M (M=Ag, Li, Cu) system —

  • H. Sawa
  • Y. Wakabayashi
  • R. Tazaki
  • T. Kakiuchi
  • K. Kanoda
  • R. Kato
Charge Order And Phase Transitions

Abstract

Synchrotron X-ray high-resolution measurements have been performed to investigate the nature of the insulating state of a quarter-filled quasi-one-dimensional conductor (DI-DCNQI)2Ag and the π-d interacted conductor (DBr-DCNQI)2Cu. The two-fold structure in the ground state of (DI-DCNQI)2Ag system consists of not only charge ordering columns but also monotonic charge dimerized columns caused by frustration among DCNQI columns. On the other hand, Cu salt in the insulating phase realizes a commensurate structure where the Cu charge ordering is coupled with the 3c-CDW in the insulator phase. The frustration among charged columns is restrained by the charge ordering of the Cu ions.

PACS number

61.10.Nz 71.30.+h 

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Copyright information

© Springer Science+Business Media, Inc 2006

Authors and Affiliations

  • H. Sawa
    • 1
    • 2
    • 3
  • Y. Wakabayashi
    • 1
    • 2
    • 3
  • R. Tazaki
    • 1
    • 2
    • 3
  • T. Kakiuchi
    • 1
    • 2
    • 3
  • K. Kanoda
    • 1
    • 2
    • 3
  • R. Kato
    • 1
    • 2
    • 3
  1. 1.Photon Factory, Institute of Materials Structure ScienceHigh Energy Accelerator Research Organization (KEK)IbarakiJapan
  2. 2.Condensed Molecular Materials Lab., RIKEN, JST-CRESTSaitamaJapan
  3. 3.Department of Applied Physics, Faculty of EngineeringThe University of Tokyo, HongoTokyoJapan

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