Appearance of Beating in the Shubnikov-de Haas Oscillations of the Organic Conductor kappa-(BEDT-TTF)(2)Cu(NCS)(2) under Pressure

作者：Kang Woun^*; Jo Younjung; Noh Dong Youn; Son Kyung In; Chung Ok Hee

来源：Journal of the Physical Society of Japan, 2010, 79(4): 044716.

DOI：10.1143/JPSJ.79.044716

• organic superconductor
• Shubnikov-de Hass oscillations
• beating
• pressure
• magnetoresistance
• interlayer resistance

We observed beats in the Shubnikov-de Haas oscillations of the interlayer magnetoresistance R-zz for the organic conductor kappa-(BEDT-TTF)(2)Cu(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(perpendicular to)/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 alpha- and beta-oscillations gave t(perpendicular to) for both orbits as 0.17 +/- 0.01 meV.

• 出版日期2010-4