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Keizo Murata,Harukazu Yoshino,Tsutomu Nakanishi,Takako Konoike,James Brooks,David Graf,Charles Mielke,George C. Papavassiliou 한국물리학회 2004 Current Applied Physics Vol.4 No.5
In the two-dimensional organic conductor, τ-(EDO-S,S-DMEDT-TTF)2(AuBr2)1+ y, we have observed Shubnikov de Hass oscillations with Landau level down ton ¼ 2 in eld up to 27 T. Motivated with this result, we extended to Hall eect study in pulsed magnetic eld up to 60 T as well as in dc eld up to 45 T and found Hall resistance plateau above 40 T (n ¼ 1). Since this system consists of two two-dimensional Fermi surface pockets, and larger pocket has a large eective mass compared with the smaller one,larger Fermi pocket behaves as a reservoir for the smaller pocket to be well-separated into completely lled and completely emptyLandau levels in a certain range of temperature and magnetic eld. The interpretation of realizing the Hall plateau can beunderstood as a new mechanism for QHE, but is quite dierent neither from localization nor eld induce spin density wave state inorganic TMTSF salts.
Shubnikov-de Haas Oscillation in PuIn3
Yoshinori Haga,Eric D. Bauer,Paul H. Tobash,Jeremy N. Mitchell,Oscar Ayala-Valenzuela,Ross D. McDonald,Charles H. Mielke,Zachary Fisk 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
The Fermi surface of PuIn3 is investigated using flux-grown single crystals. Shubnikov-de Haas(SdH) oscillations were detected by means of the skin-depth measurement using a proximitydetector-oscillator circuit. Angular dependence of the SdH frequency which corresponds to theextremal cross-sectional area of Fermi surface agrees well with the previous magnetic susceptibilitymeasurement using conventional field-modulation method. The SdH oscillation suddenly vanisheswhen the magnetic field is tilted from the cubic [111] direction.