TY - JOUR
T1 - Electric-field-induced Mott transition in an organic molecular crystal
AU - Kawasugi, Yoshitaka
AU - Yamamoto, Hiroshi M.
AU - Tajima, Naoya
AU - Fukunaga, Takeo
AU - Tsukagoshi, Kazuhito
AU - Kato, Reizo
PY - 2011/9/16
Y1 - 2011/9/16
N2 - We study the field effect on the strain-induced Mott-insulating state of an organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br. The gate voltage dependences of the conductivity, Hall coefficient, and thermopower were investigated. While the conductivity obeyed an activation-type insulating formula, the Hall coefficient and thermopower exhibited continuous transition to a metal-like band structure under high gate voltage. This indicates the merger of Hubbard bands at finite electrostatic doping; that is, the field-induced Mott transition.
AB - We study the field effect on the strain-induced Mott-insulating state of an organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br. The gate voltage dependences of the conductivity, Hall coefficient, and thermopower were investigated. While the conductivity obeyed an activation-type insulating formula, the Hall coefficient and thermopower exhibited continuous transition to a metal-like band structure under high gate voltage. This indicates the merger of Hubbard bands at finite electrostatic doping; that is, the field-induced Mott transition.
UR - http://www.scopus.com/inward/record.url?scp=80053909185&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053909185&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.84.125129
DO - 10.1103/PhysRevB.84.125129
M3 - Article
AN - SCOPUS:80053909185
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 12
M1 - 125129
ER -