Oscillations of the interlayer resistance in the quasi-two-dimensional organic conductor β-(BEDT-TTF)2I3 under pressure

W. Kang

doi:10.1016/j.physe.2007.10.052

Oscillations of the interlayer resistance in the quasi-two-dimensional organic conductor β-(BEDT-TTF)₂I₃ under pressure

W. Kang

Department of Physics

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

Abstract

We measured both the temperature and the angular dependence of the interlayer resistance of the quasi-two-dimensional organic conductor β-(BEDT-TTF)₂I₃ under a hydrostatic pressure of 7 kbar. We observed the Shubnikov-de Haas oscillations similar to those observed at the ambient pressure after pressure-temperature cycling. The amplitude of the oscillations was greatly reduced with pressure, but the quasi-two-dimensional nature was preserved in spite of a five-fold decrease in transition temperature (T_c). While the fundamental frequency increased by 6.3%, the ratio of the modulation frequency to the fundamental frequency decreased by 11%. Pressure rendered the Fermi surface more two-dimensional.

Original language	English
Pages (from-to)	1671-1673
Number of pages	3
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	40
Issue number	5
DOIs	https://doi.org/10.1016/j.physe.2007.10.052
State	Published - Mar 2008

Keywords

Fermi surface
Organic conductor
Quasi-two dimensional
Shubnikov-de Haas oscillations

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10.1016/j.physe.2007.10.052

Cite this

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title = "Oscillations of the interlayer resistance in the quasi-two-dimensional organic conductor β-(BEDT-TTF)2I3 under pressure",

abstract = "We measured both the temperature and the angular dependence of the interlayer resistance of the quasi-two-dimensional organic conductor β-(BEDT-TTF)2I3 under a hydrostatic pressure of 7 kbar. We observed the Shubnikov-de Haas oscillations similar to those observed at the ambient pressure after pressure-temperature cycling. The amplitude of the oscillations was greatly reduced with pressure, but the quasi-two-dimensional nature was preserved in spite of a five-fold decrease in transition temperature (Tc). While the fundamental frequency increased by 6.3%, the ratio of the modulation frequency to the fundamental frequency decreased by 11%. Pressure rendered the Fermi surface more two-dimensional.",

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AB - We measured both the temperature and the angular dependence of the interlayer resistance of the quasi-two-dimensional organic conductor β-(BEDT-TTF)2I3 under a hydrostatic pressure of 7 kbar. We observed the Shubnikov-de Haas oscillations similar to those observed at the ambient pressure after pressure-temperature cycling. The amplitude of the oscillations was greatly reduced with pressure, but the quasi-two-dimensional nature was preserved in spite of a five-fold decrease in transition temperature (Tc). While the fundamental frequency increased by 6.3%, the ratio of the modulation frequency to the fundamental frequency decreased by 11%. Pressure rendered the Fermi surface more two-dimensional.

KW - Fermi surface

KW - Organic conductor

KW - Quasi-two dimensional

KW - Shubnikov-de Haas oscillations

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