TY - JOUR
T1 - Theory of nonlinear conduction for charge-ordered states in quasi-two-dimensional organic conductors
AU - Tanaka, Yasuhiro
AU - Yonemitsu, Kenji
PY - 2012/5
Y1 - 2012/5
N2 - Nonlinear conduction in quasi-two-dimensional organic conductors θ -(BEDT-TTF) 2X [BEDT-TTF=bis(ethylenedithio)tetrathiafulvalene] is investigated theoretically. By using a nonequilibrium Green's function method, an extended Peierls-Hubbard model attached to metallic electrodes is studied within the mean-field approximation. We show that in a coexistent state of stripe-type and nonstripe 3-fold charge orders, the former charge order is completely suppressed by the applied bias, whereas the latter charge order survives. This leads to selective melting of charge order of different origins. The disappearance of the stripe-type charge order largely alters the conduction behavior, which is consistent with the experimental findings.
AB - Nonlinear conduction in quasi-two-dimensional organic conductors θ -(BEDT-TTF) 2X [BEDT-TTF=bis(ethylenedithio)tetrathiafulvalene] is investigated theoretically. By using a nonequilibrium Green's function method, an extended Peierls-Hubbard model attached to metallic electrodes is studied within the mean-field approximation. We show that in a coexistent state of stripe-type and nonstripe 3-fold charge orders, the former charge order is completely suppressed by the applied bias, whereas the latter charge order survives. This leads to selective melting of charge order of different origins. The disappearance of the stripe-type charge order largely alters the conduction behavior, which is consistent with the experimental findings.
KW - Charge order
KW - Nonequilibrium Green's function
KW - Nonlinear conduction
KW - Organic conductor
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U2 - 10.1002/pssc.201100642
DO - 10.1002/pssc.201100642
M3 - Article
AN - SCOPUS:84860671938
VL - 9
SP - 1186
EP - 1188
JO - Physica Status Solidi C: Conferences
JF - Physica Status Solidi C: Conferences
SN - 1862-6351
IS - 5
ER -