electron spin resonance;
cyclotron resonance;
quantum oscillations;
organic superconductors;
ET salts;
D O I:
10.1016/S0379-6779(97)80324-4
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
We present the results of a study of the millimetre-wave response of the organic metal alpha-(BEDT-TTF)(2)NH4Hg(SCN)(4), between 500 mK and 4.2 K and in magnetic fields of up to 17 T. Two relatively broad features are interpreted as a two dimensional (2D) cyclotron resonance (CR) with a CR mass m(2D)(CR) = 1.35 +/- 0.1 m(e), and a 1D CR with CR mass m(1D)(CR) = 0.85 +/- 0.05 m(e). Conduction electron spin resonance and magnetic quantum oscillations are also observed. Analysis of the quantum oscillations yields an effective mass of m(RF)* = 2.7 +/- 0.2 m(e).