T. Ivek, B. Korin-Hamzic, O. Milat, S. Tomic, C. Clauss, N. Drichko, D. Schweitzer, M. Dressel
Published 2009-12-10, updated 2010-03-29Version 2
The charge response of charge-ordered state in the organic conductor alpha-(BEDT-TTF)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 phason-like 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.
Comments: resubmitted to Phys. Rev. Lett.; 4 pages, 3 figures
Journal: Phys. Rev. Lett. 104, 206406 (2010)
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