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1.4 Structure and Properties of A3C60

Very soon after bulk quantities of crystalline C60 were available, attempts were made to intercalate them with electron donors (and other atoms) in order to vary their electronic properties. Haddon et al. [29] reported the first observation of metallic behaviour in intercalated C60, and shortly afterwards Hebard et al. [30] observed superconductivity in K3C60. The properties of superconducting A3 are summarized below without detailed references, but we begin with a list of relevant review articles to which the reader is referred for more detail and specific references. Some general reviews of experimentally determined properties of A3 superconductors are those of Ramirez[31], Holczer and Whetten[32], Tanigaki and Zhou[33], and Haddon[5]. There are two recent reviews of the NMR in A3: that of Pennington and Stenger[34] and that of Zimmer[35]. A recent review that focuses on the magnetic properties of the superconducting state of A3 is that of Buntar and Weber[36]. Theoretical aspects of these systems have been reviewed by Gelfand[6], Schlüter et al. [37], and recently by Gunnarsson[7].

There are two classes of A3 superconductors, those containing only alkali ions larger than Na+ and those containing Na+. First we discuss the former.



 
next up previous contents
Next: 1.4.1 Fmm AC Superconductors Up: 1 Introduction Previous: 1.3 Structure and Properties