TY - JOUR
T1 - Magnetic breakdown effect in organic superconductor κ-(BEDT-TTF)2Cu(NCS)2
AU - Sasaki, Takahiko
AU - Sato, Hideki
AU - Toyota, Naoki
N1 - Funding Information:
Acknowledgements-The authors would like to thank Prof. H. Anzai (Himeji Institute of Technology), Dr. M. Tokumoto (Electrotechnical Lab. ) andDr. N. Kinoshita (Electrotechnical Lab.) for the useful advice on the sample preparation and helpful discussions. The present studies have been carried out at High Field Laboratory, IMR, Tohoku Univ. and partly supported by Grant-in-Aid for Special Research from the Ministry of Education, Science and Culture of Japan. Prof. T. Fukase is appreciated for his encouragements.
PY - 1990/10
Y1 - 1990/10
N2 - The Shubnikov-de Haas oscillations with a high frequency (3800T), superimposed on the well known, low frequency (625T) oscillations, have been observed above 22T perpendicular to the conducting plane in an organic superconductor κ-(BEDT-TTF)2Cu(NCS)2. The cross-sectional area of the high frequency orbit amounts to just 100% of the first Brillouin zone. This observation is in agreement with the band structure calculations predicting the hole-like closed and the electron-like open Fermi surfaces, which are separated each other by the small energy gap along the Z-M line. The high frequency oscillations are concluded due to the magnetic breakdown effect between these two Fermi surfaces. The cyclotron effective mass of the breakdown orbit is evaluated to be (6.9±0.8)mo, which is about two times heavier than that of 3.5mo for the hole-like Fermi surface.
AB - The Shubnikov-de Haas oscillations with a high frequency (3800T), superimposed on the well known, low frequency (625T) oscillations, have been observed above 22T perpendicular to the conducting plane in an organic superconductor κ-(BEDT-TTF)2Cu(NCS)2. The cross-sectional area of the high frequency orbit amounts to just 100% of the first Brillouin zone. This observation is in agreement with the band structure calculations predicting the hole-like closed and the electron-like open Fermi surfaces, which are separated each other by the small energy gap along the Z-M line. The high frequency oscillations are concluded due to the magnetic breakdown effect between these two Fermi surfaces. The cyclotron effective mass of the breakdown orbit is evaluated to be (6.9±0.8)mo, which is about two times heavier than that of 3.5mo for the hole-like Fermi surface.
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U2 - 10.1016/0038-1098(90)90659-Y
DO - 10.1016/0038-1098(90)90659-Y
M3 - Article
AN - SCOPUS:0025505823
SN - 0038-1098
VL - 76
SP - 507
EP - 510
JO - Solid State Communications
JF - Solid State Communications
IS - 4
ER -