Charge transport in antiferromagnetic insulating phase of two-dimensional organic conductor λ-(BETS)2FeCl4

Shiori Sugiura, Kazuo Shimada, Naoya Tajima, Yutaka Nishio, Taichi Terashima, Takayuki Isono, Akiko Kobayashi, Biao Zhou, Reizo Kato, Shinya Uji

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6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number064703
Journaljournal of the physical society of japan
Volume85
Issue number6
DOIs
Publication statusPublished - 2016 Jun 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Sugiura, S., Shimada, K., Tajima, N., Nishio, Y., Terashima, T., Isono, T., Kobayashi, A., Zhou, B., Kato, R., & Uji, S. (2016). Charge transport in antiferromagnetic insulating phase of two-dimensional organic conductor λ-(BETS)2FeCl4 journal of the physical society of japan, 85(6), [064703]. https://doi.org/10.7566/JPSJ.85.064703