FERMI SURFACE STUDIES OF QUASI-1D and QUASI-2D ORGANIC SUPERCONDUCTORS USING PERIODIC ORBIT RESONANCE IN HIGH MAGNETIC FIELDS

Abstract

We have studied periodic orbit resonances (PORs) in order to probe the topology of the Fermi surface (FS) of the quasi-1D organic conductor ( TMTSF )2 ClO 4 and the quasi-2D organic conductors κ-( ET )2 Cu ( NCS )2 and κ-( ET )2 I 3. The FS of ( TMTSF )2 ClO 4 consists of a pair of weakly corrugated open sheets, while κ-( ET )2 Cu ( NCS )2 and κ-( ET )2 I 3 additionally possess warped cylindrical FS sections. In this paper, we review the POR technique for the straightforward case of ( TMTSF )2 ClO 4. We then report on a detailed study of the FS topology for κ-( ET )2 Cu ( NCS )2.