We study the microscopic aspects of the phase separation connected with the sharp edges recently observed on the equilibrium crystal shape of lead, about twenty degrees below the bulk melting temperature. We present molecular-dynamics simulations based on a many-body interatomic potential. The high-temperature orientational phase separation can be viewed as a faceting induced by anisotropy of surface melting and should occur quite universally for vicinals of nonmelting crystal surfaces.
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Bilalbegović et al. (1992) studied this question.
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