TY - JOUR
T1 - Kosterlitz-Thouless-type transition in a charge ordered state of the layered organic conductor α-(BEDT-TTF)2I3
AU - Uji, S.
AU - Kodama, K.
AU - Sugii, K.
AU - Takahide, Y.
AU - Terashima, T.
AU - Kurita, N.
AU - Tsuchiya, S.
AU - Kohno, M.
AU - Kimata, M.
AU - Yamamoto, K.
AU - Yakushi, K.
N1 - Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/5/8
Y1 - 2013/5/8
N2 - The current-voltage characteristics in the charge order state of the two-dimensional organic conductor α-(BEDT-TTF)2I3 exhibit power law behavior at low temperatures. The power law is understood in terms of the electric-field-dependent potential between electrons and holes, which are thermally excited from the charge order state. The power law exponent steeply changes from 1 to 3 in the range from 30 to 45 K with decreasing temperature, thereby suggesting the occurrence of a Kosterlitz-Thouless-type transition; many (few) unbound electron-hole pairs are thermally excited above (below) the transition. The effects of the finite size and interlayer coupling on the power law behavior are discussed.
AB - The current-voltage characteristics in the charge order state of the two-dimensional organic conductor α-(BEDT-TTF)2I3 exhibit power law behavior at low temperatures. The power law is understood in terms of the electric-field-dependent potential between electrons and holes, which are thermally excited from the charge order state. The power law exponent steeply changes from 1 to 3 in the range from 30 to 45 K with decreasing temperature, thereby suggesting the occurrence of a Kosterlitz-Thouless-type transition; many (few) unbound electron-hole pairs are thermally excited above (below) the transition. The effects of the finite size and interlayer coupling on the power law behavior are discussed.
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U2 - 10.1103/PhysRevLett.110.196602
DO - 10.1103/PhysRevLett.110.196602
M3 - Article
AN - SCOPUS:84877626975
VL - 110
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 19
M1 - 196602
ER -