Pregled bibliografske jedinice broj: 1111455
Phase Diagram of a 2D Crystal in a Slowly Varying Random Potential: Monte Carlo Simulations
Phase Diagram of a 2D Crystal in a Slowly Varying Random Potential: Monte Carlo Simulations // American Physical Society, Annual March Meeting
Kansas City (MO), Sjedinjene Američke Države, 1997. Q26.09, 1 (predavanje, međunarodna recenzija, sažetak, znanstveni)
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Naslov
Phase Diagram of a 2D Crystal in a Slowly Varying Random Potential: Monte Carlo Simulations
Autori
Mihalek, Ivana ; Fertig, Herbert ; Straley, Joseph
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Skup
American Physical Society, Annual March Meeting
Mjesto i datum
Kansas City (MO), Sjedinjene Američke Države, 17.03.1997. - 21.03.1997
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
2D crystal ; random potential ; Monte Carlo simulation
Sažetak
The phase diagram of a 2D crystal in the presence of a quenched, slowly varying random potential is investigated. An effective Hamiltonian for dislocations in the presence of disorder footnote M.C. Cha and H.A. Fertig, PRL 74, 4867 (1995). [T. Natterman, S. Scheidl, and M.S. Li, J. de Physique 5, 565 (1995).] is simulated using Monte-Carlo methods, and the melting transition is characterized (as in the absence of disorder) by the unbinding of dislocation pairs. The transition temperature between crystal and hexatic states for different disorder strengths is located by tracking the size behavior of the effective coupling constant between dislocations [M. Rubinstein, B. Shraiman, and D.R. Nelson, PRB 27), 1800 (1983)]. It is found that the crystal phase is stable at low temperatures for sufficiently weak (but non-vanishing) disorder, and approximately follows the behavior proposed in Refs. 3 and 4.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
