Phase diagram of the restricted primitive model: charge-ordering instability
We study the phase behaviour of the restricted primitive model (RPM) using a microscopic approach based on the method of collective variables with a reference system. Starting from the Hamiltonian of the RPM we derive the functional of the grand partition function given in terms of the two colle...
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| Date: | 2004 |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики конденсованих систем НАН України
2004
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| Series: | Condensed Matter Physics |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Phase diagram of the restricted primitive model: charge-ordering instability / O.V. Patsahan, I.M. Mryglod // Condensed Matter Physics. — 2004. — Т. 7, № 4(40). — С. 755–766. — Бібліогр.: 45 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | We study the phase behaviour of the restricted primitive model (RPM) using
a microscopic approach based on the method of collective variables
with a reference system. Starting from the Hamiltonian of the RPM we derive
the functional of the grand partition function given in terms of the two
collective variables: the collective variables ρk and ck describing fluctuations
of the total number density and charge density, respectively. Within
the framework of the Gaussian approximation we found the boundary of
stability with respect to fluctuations of the charge density. It is shown that
due to the approximated character of the theory the boundary of stability
is very sensitive to the particular choice of the long-range part of potential
inside the hard core. This point is discussed in more detail. |
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