Appearance of beating in the shubnikov-de haas oscillations of the organic conductor κ-(BEDT-TTF)2Cu(NCS)2 under pressure

Woun Kang, Younjung Jo, Dong Youn Noh, Kyung In Son, Ok Hee Chung

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Abstract

We observed beats in the Shubnikov-de Haas oscillations of the interlayer magnetoresistance Rzz for the organic conductor κ-(BEDT-TTF) 2Cu(NCS)2 pressurized at 7 kbar. Direct observation of a beat pattern is an evidence of coherence in interlayer electron transport. From the beat frequency, the amplitude of the interlayer dispersion, t =E F, was estimated to be 1/250 which doubles the previous estimation from the coherence peak at ambient pressure. In the Fourier transformation spectrum, the frequency splits in the α- and β-oscillations gave t for both orbits as 0:17 ± 0:01 meV.

Original languageEnglish
Article number044716
JournalJournal of the Physical Society of Japan
Volume79
Issue number4
DOIs
StatePublished - Apr 2010

Keywords

  • Beating
  • Interlayer resistance
  • Magnetoresistance
  • Organic superconductor
  • Pressure
  • Shubnikov-de Hass oscillations

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