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Tunnelling Model for Quasi‐One‐Dimensional Hydrogen‐Bonded Crystals
Author(s) -
Plascak J. A.,
Salinas S. R.
Publication year - 1982
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.2221130139
Subject(s) - quantum tunnelling , anisotropy , ising model , ferroelectricity , hamiltonian (control theory) , hydrogen , condensed matter physics , materials science , statistical physics , physics , quantum mechanics , mathematics , mathematical optimization , dielectric
Tunnelling term is included in the Hamiltonian of an anisotropic Ising model which is used to explain the thermodynamic properties of quasi‐one‐dimensional hydrogen‐bonded ferroelectric crystals. A variational approach is used to treat the strong intrachain interactions accurately, while the weak interchain interactions are accounted for in a mean‐field approximation. Also, fittings are presented of some experimental data pertaining to crystals of PbHPO 4 .