Crystal Structure of Rb4C60 and K4C60 under Pressure

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We show that Rb_4C_60 transforms from its ambient pressure orientationally disordered tetragonal structure to an ordered orthorhombic structure (isostructural to Cs_4C_60) at or above 0.4 GPa. This opens the possibility of studying the previously observed metal-insulator transition under pressure in this narrow band system as a function of a continuous variable, rather than formulating distinct models for conducting and insulating fullerides. No such transition is observed in K_4C_60 to 2.0 GPa
13 pages 4 figures

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Strongly Correlated Electrons, Materials Science

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http://salesiana.dossiersoluciones.com/handle/123456789/107053

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0601425
 http://arxiv.org/abs/cond-mat/0601425

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arXiv