TY - JOUR
T1 - Charge transport in antiferromagnetic insulating phase of two-dimensional organic conductor λ-(BETS)2FeCl4
AU - Sugiura, Shiori
AU - Shimada, Kazuo
AU - Tajima, Naoya
AU - Nishio, Yutaka
AU - Terashima, Taichi
AU - Isono, Takayuki
AU - Kobayashi, Akiko
AU - Zhou, Biao
AU - Kato, Reizo
AU - Uji, Shinya
N1 - Publisher Copyright:
©2016 The Physical Society of Japan.
PY - 2016/6/15
Y1 - 2016/6/15
N2 - Resistance and dielectric constants have been measured in the antiferromagnetic insulating phase of the quasi-two-dimensional organic conductor λ-(BETS)2FeCl4 to understand charge transport. Nonlinear current-voltage characteristics are observed at low temperatures, which are explained by a charge transport model based on the electric-field dependent Coulomb potential between the thermally excited electron and hole. A small dip in the magnetic field dependence of the resistance is found at 1.2 T, which is ascribed to a spin-flop transition. The large difference between the in-plane and out-of-plane dielectric constants shows the two-dimensionality of the Coulomb potential, which is consistent with the charge transport model. The angular dependence of the metal-insulator transition field is determined, which suggests that the Zeeman effect of the 3d spins of the Fe ions plays an essential role.
AB - Resistance and dielectric constants have been measured in the antiferromagnetic insulating phase of the quasi-two-dimensional organic conductor λ-(BETS)2FeCl4 to understand charge transport. Nonlinear current-voltage characteristics are observed at low temperatures, which are explained by a charge transport model based on the electric-field dependent Coulomb potential between the thermally excited electron and hole. A small dip in the magnetic field dependence of the resistance is found at 1.2 T, which is ascribed to a spin-flop transition. The large difference between the in-plane and out-of-plane dielectric constants shows the two-dimensionality of the Coulomb potential, which is consistent with the charge transport model. The angular dependence of the metal-insulator transition field is determined, which suggests that the Zeeman effect of the 3d spins of the Fe ions plays an essential role.
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U2 - 10.7566/JPSJ.85.064703
DO - 10.7566/JPSJ.85.064703
M3 - Article
AN - SCOPUS:84971281205
VL - 85
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 6
M1 - 064703
ER -