Infrared Spectroscopic Study of Phase Transisions in A1c60 Compounds (a=K,Rb,Cs)

Details Infrared Spectroscopic Study of Phase Transisions in A1c60 Compounds (a=K,Rb,Cs) Infrared Spectroscopic Study of Phase Transisions in A1c60 Compounds (a=K,Rb,Cs)

1994-05-11

arxiv.org/abs/cond-mat/9405033v1

Mol. Cryst. Liq. Cryst. 256, 275 (1994)

Physics

Condensed Matter

To be published in Mol. Cryst. Liq. Cryst., Procceding of 1994 Salt Lake City conference on Fullerenes. Postscript file includ

Scientific paper

Optical measurements on doped C$_{60}$ films provide evidence for a transition from a high temperature conducting phase to a low temperature insulating phase in quenched Rb$_1$C$_{60}$ and K$_1$C$_{60}$ compounds, while Cs$_1$C$_{60}$ did not exhibit this behavior. For slow cooled samples our study confirms earlier results indicating phase separation of K$_1$C$_{60}$ to K$_3$C$_{60}$ and C$_{60}$, and the formation of a new Rb$_1$C$_{60}$ phase at low temperatures. Upon slow cooling Cs$_1$C$_{60}$ behaves similar to Rb$_1$C$_{60}$.

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