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High‐pressure and high‐temperature study of phase transitions in solid germanium
Author(s) -
Di Cicco Andrea,
Frasini Anna Chiara,
Minicucci Marco,
Principi Emiliano,
Itiè JeanPaul,
Munsch Pascal
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301847
Subject(s) - metastability , germanium , high pressure , thermodynamics , isothermal process , equation of state , materials science , tin , phase (matter) , diamond , diamond anvil cell , crystallography , solid solution , solid state , bulk modulus , chemistry , metallurgy , physics , organic chemistry , silicon
A detailed investigation of the pressure and temperature dependence of the structure of stable and metastable solid Ge phases in the 0–15 GPa and 295–500 K ranges is presented. Structural results including the equation of state, characteristic of coexistence regions of diamond and β‐tin structures, and appearance of metastable phases are discussed and compared with the results presently available in the literature. The isothermal bulk modulus and its derivative are evaluated using temperature‐dependent equations of state for Ge I (cubic) and Ge II (β‐Sn), and for the Ge III (ST12) metastable polymorph at 400 K. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)