Collective Excitations in the Charge-Ordered Phase of α(BEDTTTF)2I3

T. Ivek, B. Korin-Hamzić, O. Milat, S. Tomić, C. Clauss, N. Drichko, D. Schweitzer, and M. Dressel
Phys. Rev. Lett. 104, 206406 – Published 21 May 2010

Abstract

The charge response of a charge-ordered state in the organic conductor α(BEDTTTF)2I3 is characterized by dc resistivity, dielectric and optical spectroscopy in different crystallographic directions within the two-dimensional conduction layer. Two dielectric modes are detected. The large mode is related to the phasonlike excitation of the 2kF bond-charge density wave which forms in the ab plane. The small dielectric mode is associated with the motion of domain-wall pairs along the a and b axes between two types of domains which are created due to inversion symmetry breaking.

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  • Received 7 December 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.206406

©2010 American Physical Society

Authors & Affiliations

T. Ivek*, B. Korin-Hamzić, O. Milat, and S. Tomić

  • Institut za fiziku, P.O. Box 304, HR-10001 Zagreb, Croatia

C. Clauss, N. Drichko, D. Schweitzer, and M. Dressel

  • Physikalisches Institut, Universität Stuttgart, D-70550, Stuttgart, Germany

  • *tivek@ifs.hr; http://real-science.ifs.hr/

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Vol. 104, Iss. 20 — 21 May 2010

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