Large magnetic-field-induced Fermi surface changes in alpha -ET<sub>2</sub>KHg(NCS)<sub>4</sub>
J Caulfield; J Singleton; P T J Hendriks; J A A J Perenboom; F L Pratt; M Doporto; W Hayes; M Kurmoo; P Day; J Caulfield; Clarendon Lab., Oxford Univ., UK; J Singleton; Clarendon Lab., Oxford Univ., UK; P T J Hendriks; Clarendon Lab., Oxford Univ., UK; J A A J Perenboom; Clarendon Lab., Oxford Univ., UK; F L Pratt; Clarendon Lab., Oxford Univ., UK; M Doporto; Clarendon Lab., Oxford Univ., UK; W Hayes; Clarendon Lab., Oxford Univ., UK; M Kurmoo; Clarendon Lab., Oxford Univ., UK; P Day; Clarendon Lab., Oxford Univ., UK
Журнал:
Journal of Physics: Condensed Matter
Дата:
1994-03-28
Аннотация:
We report angle-dependent magnetoresistance experiments on the charge-transfer salt ( alpha -ET<sub>2</sub>KHg(NCS)<sub>4</sub> using fields of up to 30 T. The data indicate that the widely reported high-field 'kink' observed in the magnetoresistance of the alpha -ET<sub>2</sub>MHg(NCS)<sub>4</sub> (M=K, Tl, Rb) family of charge-transfer salts represents a transition from an imperfectly nested spin-density wave ground state, characterized by a quasi-one-dimensional Fermi surface sheet tilted with respect to the b*c plane, to a state with a cylindrical two-dimensional Fermi surface.
383.2Кб