Computer simulations of vibrational spectra and sound velocity in liquid cesium up to the critical point
The results of ‘phonon’-spectra computer simulations on the basis of the recursion method for liquid cesium for the whole temperature range up to the critical point are presented. The comparison of the experimental data and the calculation results allowed us to conclude that the method gives a preci...
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| Published in: | Journal of non-crystalline solids Vol. 312; pp. 138 - 142 |
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| Format: | Journal Article |
| Language: | English |
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Elsevier B.V
01-10-2002
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| Abstract | The results of ‘phonon’-spectra computer simulations on the basis of the recursion method for liquid cesium for the whole temperature range up to the critical point are presented. The comparison of the experimental data and the calculation results allowed us to conclude that the method gives a precision that is sufficient for the quantitative calculation of the physical properties of melts. We establish that the dispersion curves,
ω(
k), used in analytical theories, in the case of liquid metal has the meaning of a average frequency of a spectrum of collective excitations at the given
k value. The application of this method to liquid cesium at various temperatures has shown that at high temperatures there is a qualitative modification of the phonon spectrum that suggests a high localization of the vibration states of liquid metals. The results indicate the presence of a considerable number of highly bound clusters such as dimers, molecular ions or tetrahedrons in liquid metals at high temperatures. |
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| AbstractList | The results of ‘phonon’-spectra computer simulations on the basis of the recursion method for liquid cesium for the whole temperature range up to the critical point are presented. The comparison of the experimental data and the calculation results allowed us to conclude that the method gives a precision that is sufficient for the quantitative calculation of the physical properties of melts. We establish that the dispersion curves,
ω(
k), used in analytical theories, in the case of liquid metal has the meaning of a average frequency of a spectrum of collective excitations at the given
k value. The application of this method to liquid cesium at various temperatures has shown that at high temperatures there is a qualitative modification of the phonon spectrum that suggests a high localization of the vibration states of liquid metals. The results indicate the presence of a considerable number of highly bound clusters such as dimers, molecular ions or tetrahedrons in liquid metals at high temperatures. |
| Author | Smolin, Nikolai P. Mirzoev, Alexander A. Gelchinski, Boris R. |
| Author_xml | – sequence: 1 givenname: Boris R. surname: Gelchinski fullname: Gelchinski, Boris R. email: brg@sci.urc.ac.ru organization: Chelyabinsk Center of Ural Branch of the Russian Academy of Sciences, ul. Kommuny, 68, 454000 Chelyabinsk, Russia – sequence: 2 givenname: Alexander A. surname: Mirzoev fullname: Mirzoev, Alexander A. organization: Department of General and Theory Physics, Southern Ural State University, 454080 Chelyabinsk, Russia – sequence: 3 givenname: Nikolai P. surname: Smolin fullname: Smolin, Nikolai P. organization: Department of General and Theory Physics, Southern Ural State University, 454080 Chelyabinsk, Russia |
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| Cites_doi | 10.1088/0953-8984/6/25/003 10.1143/PTP.45.331 10.1002/bbpc.19870911205 10.1088/0953-8984/4/7/005 10.1103/PhysRevB.27.678 10.1103/PhysRevB.24.7385 10.1016/0010-4655(84)90163-2 10.1088/0953-8984/2/S/037 |
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| References | Yuriev, Gelchinski, Ukhov (BIB3) 1982; 4 Ichimaru, Utsumi (BIB10) 1982; 24 Maradudin, Montrol, Weiss, Ipatova (BIB8) 1971 Morkel, Bodensteiner (BIB12) 1990; 2 Takeno, Goda (BIB2) 1971; 45 Hafner, Krajci (BIB5) 1994; 6 Nex (BIB11) 1984; 34 Redmer, Reinholz, Ropke, Winter, Noll, Hensel (BIB14) 1992; 4 Haydock (BIB6) 1980; 35 Gelchinski, Yuriev, Vatolin, Ukhov (BIB9) 1981; 261 Ashcroft, Mermin (BIB1) 1976 Hafner (BIB4) 1983; 27 Winter, Hensel, Bodensteiner, Glaser (BIB7) 1987; 91 Bystrov, Kagan, Krechetova, Shpilrain (BIB13) 1990 Maradudin (10.1016/S0022-3093(02)01665-4_BIB8) 1971 Gelchinski (10.1016/S0022-3093(02)01665-4_BIB9) 1981; 261 Bystrov (10.1016/S0022-3093(02)01665-4_BIB13) 1990 Yuriev (10.1016/S0022-3093(02)01665-4_BIB3) 1982; 4 Redmer (10.1016/S0022-3093(02)01665-4_BIB14) 1992; 4 Haydock (10.1016/S0022-3093(02)01665-4_BIB6) 1980; 35 Ashcroft (10.1016/S0022-3093(02)01665-4_BIB1) 1976 Hafner (10.1016/S0022-3093(02)01665-4_BIB4) 1983; 27 Ichimaru (10.1016/S0022-3093(02)01665-4_BIB10) 1982; 24 Takeno (10.1016/S0022-3093(02)01665-4_BIB2) 1971; 45 Winter (10.1016/S0022-3093(02)01665-4_BIB7) 1987; 91 Nex (10.1016/S0022-3093(02)01665-4_BIB11) 1984; 34 Hafner (10.1016/S0022-3093(02)01665-4_BIB5) 1994; 6 Morkel (10.1016/S0022-3093(02)01665-4_BIB12) 1990; 2 |
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| Title | Computer simulations of vibrational spectra and sound velocity in liquid cesium up to the critical point |
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