Výsledky vyhledávání - "J. F. M. Rocha"

New Calculations of ICDW Eigenmode Frequencies of 2H-TaSe2

Autor: E. M. do Nascimento, J. F. M. Rocha, A. L. Ribeiro Filho, D. S. de Vasconcelos

Publikováno v: Repositório Institucional da UFBA
Universidade Federal da Bahia (UFBA)
instacron:UFBA

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Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adf425a36b8a19bcfd22a947616f348c
https://doi.org/10.1002/(sici)1521-3951(199902)211:2<595::aid-pssb595>3.0.co

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Phase Transitions in Two-Dimensional Incommensurate Systems

Autor: J. F. M. Rocha, A. L. Ribeiro Filho, D. S. de Vasconcelos

Publikováno v: physica status solidi (b). 205:473-479

Analytical and numerical calculations are performed in order to get free energies and critical temperature expressions for dichalcogenide transition metals which are incommensurate systems and present charge density waves (CDW). General results are o

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https://doi.org/10.1002/(sici)1521-3951(199802)205:2<473::aid-pssb473>3.0.co

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Hamiltonian dynamics of the Landau-Ginzburg model for the phase transition in (NH4)2BeF4

Autor: R. C. de Miranda Filho, A. L. Ribeiro Filho, J. F. M. Rocha, D. S. de Vasconcelos

Publikováno v: Brazilian Journal of Physics, Volume: 30, Issue: 3, Pages: 602-609, Published: 2000
Brazilian Journal of Physics v.30 n.3 2000
Brazilian Journal of Physics
Sociedade Brasileira de Física (SBF)
instacron:SBF

We present a Hamiltonian treatment of the Landau-Ginzburg theory of phase transitions in the case of incommensurate ferroelectric systems like (NH4)2BeF4. This formulation has the advantage of treating the system as an example of a nonlinear dynamica

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http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332000000300019&lng=en&tlng=en

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