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Wave shape of de Haas-van Alphen oscillations and effective mass in the two-dimensional organic conductor α-(BEDT-TTF)2KHg(SCN)4 |
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| Authors: | S Uji JS Brooks M Chaparala L Seger T Szabo M Tokumoto N Kinoshita T Kinoshita Y Tanaka H Anzai |
| Institution: | aTsukuba Magnet Laboratories, NRIM, Tsukuba, Ibaraki 305, Japan;bNHMFL, Florida State University, Tallahassee, Florida 32306-4005, U.S.A.;cElectrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan;dHimeji Institute of Technology, Akahogun, Hyogo 678-12, Japan |
| Abstract: | De Haas-van Alphen (dHvA) oscillations in the two dimensional organic conductor α-(BEDT-TTF)2KHg(SCN)4 have been measured by a canti-lever technique at high magnetic fields up to 30 T. The wave shape of the dHvA oscillations undergoes a drastic change around the transition field BK (24 T). The effective mass shifts 1.5 m0 in the density wave phase (B<BK) to 1.65 m0 in the normal metallic phase (B>BK). Based on the simulation, we have determined that the primary cause of the characteristic field dependence of the wave shape is the change in the effective mass. |
| Keywords: | A organic crystals D phase transitions |
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