Journal
PHYSICAL REVIEW B
Volume 73, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.73.134105
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Displacive mechanisms are proposed for the high-pressure structural transitions which take place in Si, Ge, Sn, and Pb. The mechanisms are analyzed in the framework of the Landau theory of phase transitions. It reveals a number of unifying features which are discussed in connection with the electronic structures of these elements, leading to a more precise understanding of the diversity of phase diagrams found for the elements of Group IVa.
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