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Landau model for uniaxial systems with complex order parameter
Physical review B: Condensed matter and materials physics, 58 (1998), 17; 11273-11284. https://doi.org/10.1103/PhysRevB.58.11273
Latković, M.; Bjeliš, Aleksa

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Latković, M. i Bjeliš, A. (1998). Landau model for uniaxial systems with complex order parameter. Physical review B: Condensed matter and materials physics, 58. (17), 11273-11284. doi: 10.1103/PhysRevB.58.11273

Latković, M. i Aleksa Bjeliš. "Landau model for uniaxial systems with complex order parameter." Physical review B: Condensed matter and materials physics, vol. 58, br. 17, 1998, str. 11273-11284. https://doi.org/10.1103/PhysRevB.58.11273

Latković, M. i Aleksa Bjeliš. "Landau model for uniaxial systems with complex order parameter." Physical review B: Condensed matter and materials physics 58, br. 17 (1998): 11273-11284. https://doi.org/10.1103/PhysRevB.58.11273

Latković, M. i Bjeliš, A. (1998) 'Landau model for uniaxial systems with complex order parameter', Physical review B: Condensed matter and materials physics, 58(17), str. 11273-11284. doi: 10.1103/PhysRevB.58.11273

Latković M, Bjeliš A. Landau model for uniaxial systems with complex order parameter. Physical review B: Condensed matter and materials physics [Internet]. 1998. [pristupljeno 26.04.2024.];58(17):11273-11284. doi: 10.1103/PhysRevB.58.11273

M. Latković i A. Bjeliš, "Landau model for uniaxial systems with complex order parameter", Physical review B: Condensed matter and materials physics, vol. 58, br. 17, str. 11273-11284, 1998. [Online]. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:217:631913. [Citirano: 26.04.2024.]

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Podaci o radu
Naslov (engleski)Landau model for uniaxial systems with complex order parameter
AutorM. Latković
AutorAleksa Bjeliš
Autorova ustanovaSveučilište u Zagrebu
Prirodoslovno-matematički fakultet
(Fizički odsjek)
Znanstveno / umjetničko
područje, polje i grana		PRIRODNE ZNANOSTI
Fizika
Sažetak (engleski)
We study the Landau model for uniaxial incommensurate-commensurate systems of class I by keeping umklapp terms of third and fourth order in the expansion of the free energy. It applies to systems in which the soft-mode minimum lies between the corresponding commensurate wave numbers. The minimization of the Landau functional leads to the sine-Gordon equation with two nonlinear terms, equivalent to the equation of motion for the well-known classical mechanical problem of two mixing resonances. We calculate the average free energies for periodic, quasiperiodic, and chaotic solutions of this equation, and show that in the regime of finite strengths of umklapp terms only periodic solutions are absolute minima of the free energy, so that the phase diagram contains only commensurate configurations. The phase transitions between neighboring configurations are of the first order, and the wave number of ordering goes through a harmless staircase with a finite number of steps. These results are the basis for the interpretation of phase diagrams for some materials from class I of incommensurate-commensurate systems, in particular of those for A2BX4 and betaine-calciumchloride-dihydrate compounds. Also, we argue that chaotic barriers which separate metastable periodic solutions represent an intrinsic mechanism for observed memory effects and thermal hystereses.
Ključne riječi (engleski)
Jezikengleski
Vrsta publikacijeZnanstveni rad - Izvorni znanstveni rad
Status objaveObjavljen
Vrsta recenzijeRecenziran - međunarodna recenzija
Verzija publikacijeObjavljena verzija rada (izdavačev PDF)
Naslov časopisaPhysical review B: Condensed matter and materials physics
Brojčani podacivol. 58, br. 17, str. 11273-11284
p-ISSN1098-0121
e-ISSN1550-235X
DOIhttps://doi.org/10.1103/PhysRevB.58.11273
URN:NBNurn:nbn:hr:217:631913
Datum objave publikacije1998
URL dokumentahttp://link.aps.org/doi/10.1103/PhysRevB.58.11273
Vrsta resursaTekst
Prava pristupaOtvoreni pristup
Uvjeti korištenjaIkona licence Zaštićeno autorskim pravom.
Javna napomenaCopyright (1998) by the American Physical Society.
Datum i vrijeme pohrane2019-10-06 20:27:10