Appearance of Beating in the Shubnikov–de Haas Oscillations of the Organic Conductor $\kappa$-(BEDT-TTF)2Cu(NCS)2 under Pressure
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概要
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We observed beats in the Shubnikov–de Haas oscillations of the interlayer magnetoresistance $R_{zz}$ for the organic conductor $\kappa$-(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, $t_{\bot}/E_{\text{F}}$, 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 $t_{\bot}$ for both orbits as $0.17\pm 0.01$ meV.
- 2010-04-15
著者
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Noh Dong-Youn
Department of Chemistry, Seoul Women's University, Seoul 139-774, Korea
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Kang Woun
Department of Physics, Ewha Womans University, Seoul 120-750, Korea
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Jo Younjung
Department of Physics, Ewha Womans University, Seoul 120-750, Korea
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Son Kyung-In
Department of Chemistry, Seoul Women's University, Seoul 139-774, Korea
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Chung Ok-Hee
Department of Physics, Sunchon University, Sunchon 540-742, Korea
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Son Kyung-In
Department of Chemistry, Seoul Women's University, Seoul 139-774, Korea