A behavior of plastic deformations of C60 single crystals was examined using the microindentation technique. Not only slip lines but also dislocation etch pits were observed around the indentation on the crystal surface. It is confirmed that the slip systems in C60 single crystals are {111}〈110〉 in a temperature range of 240 K to 450 K. This means that, even in a simple cubic phase below a phase transition temperature of ∼260 K, the slip systems are the same as a face-centered-cubic phase.
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