Self-Detection of High-Frequency Mechanical Oscillations of Whiskers in Quasi-1D Conductors with Charge-Density Wave

Resumo

Heterodyne mixing with frequency modulation is employed for detection of torsional resonances of whiskers in rhombic TaS₃ (typical quasi-1D conductor) with charge-density wave (CDW). The dependences of both torque and the feedback signal of torsion on the internal properties of CDW are distinctive features of the proposed method. Sample placement in the vicinity of the electrode that serves as gate is unnecessary. Electromechanical and elastic properties of the CDW systems can be studied with the aid of the proposed method, at least, in the megahertz frequency range.