title: Collective excitations in the charge-ordered phase of α-(BEDT-TTF)2I3.
abstract: The charge response of a charge-ordered state in the organic conductor α-(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 phasonlike excitation of the 2k(F) 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.
authors.affiliation: Institut za fiziku, P.O. Box 304, HR-10001 Zagreb, Croatia. tivek@ifs.hr
authors.forename: T
authors.initials: T
authors.lastname: Ivek
authors.forename: B
authors.initials: B
authors.lastname: Korin-Hamzić
authors.forename: O
authors.initials: O
authors.lastname: Milat
authors.forename: S
authors.initials: S
authors.lastname: Tomić
authors.forename: C
authors.initials: C
authors.lastname: Clauss
authors.forename: N
authors.initials: N
authors.lastname: Drichko
authors.forename: D
authors.initials: D
authors.lastname: Schweitzer
authors.forename: M
authors.initials: M
authors.lastname: Dressel