Non-linear current-voltage characteristics in α-(BEDT-TTF) 2I3

K. Kodama; M. Kimata; Y. Takahide; T. Terashima; H. Satsukawa; A. Harada; K. Hazama; S. Uji; K. Yamamoto; K. Yakushi

doi:10.1016/j.physb.2010.01.133

Non-linear current-voltage characteristics in α-(BEDT-TTF) ₂I₃

K. Kodama, M. Kimata, Y. Takahide, T. Terashima, H. Satsukawa, A. Harada, K. Hazama, S. Uji, K. Yamamoto, K. Yakushi

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Current-voltage (I-V) characteristics have been measured to clarify the charge transport mechanism in the charge order state of a two dimensional organic conductor α-(BEDT-TTF)₂I₃. At low temperatures, we find strong non-linear I-V characteristics that follow the power law approximately. The non-linear I-V characteristics are attributed to the electric-filed-assisted unbinding of excited pairs of an electron and a hole that attract each other due to two-dimensional long-range Coulomb interaction. We also report a larger anisotropy in the dielectric constant, which shows the highly two-dimensional nature of the Coulomb interaction in the BEDT-TTF layers.

Original language	English
Pages (from-to)	S176-S178
Journal	Physica B: Condensed Matter
Volume	405
Issue number	11 SUPPL.
DOIs	https://doi.org/10.1016/j.physb.2010.01.133
Publication status	Published - 2010 Jun 1
Externally published	Yes

Keywords

Charge order
Coulomb interaction
Current-voltage characteristics
Dielectric constant
Long-range
Non-linear I-V
Organic material
Two-dimensional conductor

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2010.01.133

Cite this

@article{ab88f4aa6b3f4cf7b5756880be37765d,

title = "Non-linear current-voltage characteristics in α-(BEDT-TTF) 2I3",

abstract = "Current-voltage (I-V) characteristics have been measured to clarify the charge transport mechanism in the charge order state of a two dimensional organic conductor α-(BEDT-TTF)2I3. At low temperatures, we find strong non-linear I-V characteristics that follow the power law approximately. The non-linear I-V characteristics are attributed to the electric-filed-assisted unbinding of excited pairs of an electron and a hole that attract each other due to two-dimensional long-range Coulomb interaction. We also report a larger anisotropy in the dielectric constant, which shows the highly two-dimensional nature of the Coulomb interaction in the BEDT-TTF layers.",

keywords = "Charge order, Coulomb interaction, Current-voltage characteristics, Dielectric constant, Long-range, Non-linear I-V, Organic material, Two-dimensional conductor",

author = "K. Kodama and M. Kimata and Y. Takahide and T. Terashima and H. Satsukawa and A. Harada and K. Hazama and S. Uji and K. Yamamoto and K. Yakushi",

note = "Funding Information: K.K. and K.H. thank NIMS for providing a junior research assistantship. This research was partially supported by Grant-in-Aid for Scientific Research on Innovative Areas (No. 20110004) from the Ministry of Education, Science, Sports and Culture.",

year = "2010",

month = jun,

day = "1",

doi = "10.1016/j.physb.2010.01.133",

language = "English",

volume = "405",

pages = "S176--S178",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

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T1 - Non-linear current-voltage characteristics in α-(BEDT-TTF) 2I3

AU - Kodama, K.

AU - Kimata, M.

AU - Takahide, Y.

AU - Terashima, T.

AU - Satsukawa, H.

AU - Harada, A.

AU - Hazama, K.

AU - Uji, S.

AU - Yamamoto, K.

AU - Yakushi, K.

N1 - Funding Information: K.K. and K.H. thank NIMS for providing a junior research assistantship. This research was partially supported by Grant-in-Aid for Scientific Research on Innovative Areas (No. 20110004) from the Ministry of Education, Science, Sports and Culture.

PY - 2010/6/1

Y1 - 2010/6/1

N2 - Current-voltage (I-V) characteristics have been measured to clarify the charge transport mechanism in the charge order state of a two dimensional organic conductor α-(BEDT-TTF)2I3. At low temperatures, we find strong non-linear I-V characteristics that follow the power law approximately. The non-linear I-V characteristics are attributed to the electric-filed-assisted unbinding of excited pairs of an electron and a hole that attract each other due to two-dimensional long-range Coulomb interaction. We also report a larger anisotropy in the dielectric constant, which shows the highly two-dimensional nature of the Coulomb interaction in the BEDT-TTF layers.

AB - Current-voltage (I-V) characteristics have been measured to clarify the charge transport mechanism in the charge order state of a two dimensional organic conductor α-(BEDT-TTF)2I3. At low temperatures, we find strong non-linear I-V characteristics that follow the power law approximately. The non-linear I-V characteristics are attributed to the electric-filed-assisted unbinding of excited pairs of an electron and a hole that attract each other due to two-dimensional long-range Coulomb interaction. We also report a larger anisotropy in the dielectric constant, which shows the highly two-dimensional nature of the Coulomb interaction in the BEDT-TTF layers.

KW - Charge order

KW - Coulomb interaction

KW - Current-voltage characteristics

KW - Dielectric constant

KW - Long-range

KW - Non-linear I-V

KW - Organic material

KW - Two-dimensional conductor

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DO - 10.1016/j.physb.2010.01.133

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