Effect of vacancies on the thermodynamics of crystal evaporation

Bogolyubov, N.A.; Masharov, S. I.; Khandros, V. O.; Pomeranskii, A. A.

doi:10.1002/pssa.2210260203

Cited by 2 publications

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“…As to a nonrelativistic analog of the Goldstone theorem, it has been proved only for translation invariant systems with finite range interactions[24]. Systems in a magnetic field do not satisfy this condition 3.…”

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confidence: 99%

Dynamical flavor symmetry breaking by a magnetic field in 2+1 dimensions

1995

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It is shown that in 2 + 1 dimensions, a constant magnetic field is a strong catalyst of dynamical flavor symmetry breaking, leading to generating a fermion dynamical mass even at the weakest attractive interaction between fermions. The essence of this effect is that in a magnetic field, in 2 + 1 dimensions, the dynamics of fermion pairing is essentially onedimensional. The effect is illustrated in the Nambu-Jona-Lasinio model in a magnetic field.The low-energy effective action in this model is derived and the thermodynamic properties of the model are considered. The relevance of this effect for planar condensed matter systems and for 3 + 1 dimensional theories at high temperature is pointed out.

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confidence: 99%

Dynamical flavor symmetry breaking by a magnetic field in 2+1 dimensions

1995

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“…Taking into consideration the anharmonicity leads to a change of the value and temperature dependence of the saturation vapour pressure. In crystals with large anharmonicity the temperature effect may reach about 10% considerably exceeding the contribution due to the presence of vacancies [2]. Simultaneous separation of anharmonic contributions to heat capacity and vapour pressure above the crystal allows an experimental determination of anharmonicity constants and their change due to impurities.…”

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Anharmonic Effects in Heat Capacity and Saturation Vapour Pressure of Dilute Substitutional Alloys

Masharov¹

1976

Physica Status Solidi (b)

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The contribution to the heat capacity and equilibrium pressure of the vapour over crystals due to the anharmonicity of atomic vibrations is calculated. It is shown that the anharmonicity changes the temperature dependence of the saturation pressure. This change is simply connected with the anharmonic addition to the heat capacity. In the high temperature region the vapour density over the crystal is increased several times due to the anharmonism. The corresponding temperature addition may be about 10%. The temperature dependences of the anharmonic contribution to the heat capacity at high and low temperatures are found. I n the high-temperature region the corresponding addition is linear in temperature. At low temperatures its behaviour is more complicated, especially in crystals containing heavy substitutional impurities an anomalous growth may be observed.Es wird der Beitrag zur Wiirmekapazitiit und zum Gleichgewichtsdampfdruck von Kristallen berechnet, der infolge der Anharmonizitiit der Atomschwingungen auftritt. Es wird gezeigt, daB die Anharmonizitit die Temperaturabhiingigkeit des Siittigungsdampfdruckes iindert. Diese dnderung ist in einfacher Weise mit dem Anharmonizitiitsbeitrag der Warmekapazitat verkniipft. Im Bereich hoher Temperaturen nimmt die Dampfdichte uber dem Kristall einige Male zu. Die entsprechende Temperaturerhohung kann etwa 10% betragen. Die Temperaturabhiingigkeit des anharmonischen Beitrags zur Wiirmekapazitiit wird bei tiefen und hohen Temperaturen bestimmt. Im Bereich hoher Temperaturen ist der entsprechende Zusatz linear mit der Temperatur. Bei niedrigen Temperaturen ist das Verhalten komplexer, insbesondere in Kristallen, die schwere Substitutionsstorstellen enthalten, kann ein anomales Anwachsen beobachtet werden.

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Effect of vacancies on the thermodynamics of crystal evaporation

Cited by 2 publications

References 1 publication

Dynamical flavor symmetry breaking by a magnetic field in 2+1 dimensions

Dynamical flavor symmetry breaking by a magnetic field in 2+1 dimensions

Anharmonic Effects in Heat Capacity and Saturation Vapour Pressure of Dilute Substitutional Alloys

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