Shape transition and dislocation nucleation in strained epitaxial islands
We study numerically the equilibrium shape, shape transition and dislocation nucleation in strained epitaxial islands with a two-dimensional atomistic model, using interatomic potentials of Lennard-Jones type. The phase diagram for the equilibrium island shapes as a function of island size and latti...
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| Published in | Brazilian journal of physics Vol. 36; no. 2a; pp. 328 - 331 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Sociedade Brasileira de Física
01.06.2006
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| Subjects | |
| Online Access | Get full text |
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| Abstract | We study numerically the equilibrium shape, shape transition and dislocation nucleation in strained epitaxial islands with a two-dimensional atomistic model, using interatomic potentials of Lennard-Jones type. The phase diagram for the equilibrium island shapes as a function of island size and lattice misfit with the substrate is obtained by an energy minimization procedure which does not require predefined faceted shapes. We determine the energy barrier and transition path for transition between different shapes of the islands and for dislocation nucleation in initially coherent islands using a method introduced recently, based on a systematic search of the transition paths for activated events. |
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| AbstractList | We study numerically the equilibrium shape, shape transition and dislocation nucleation in strained epitaxial islands with a two-dimensional atomistic model, using interatomic potentials of Lennard-Jones type. The phase diagram for the equilibrium island shapes as a function of island size and lattice misfit with the substrate is obtained by an energy minimization procedure which does not require predefined faceted shapes. We determine the energy barrier and transition path for transition between different shapes of the islands and for dislocation nucleation in initially coherent islands using a method introduced recently, based on a systematic search of the transition paths for activated events. |
| Author | Trushin, O. Ying, S.C. Granato, E. Ala-Nissila, T. Jalkanen, J. |
| AuthorAffiliation | Brown University Russian Academy of Sciences Instituto Nacional de Pesquisas Espaciais Helsinki University of Technology |
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| DOI | 10.1590/S0103-97332006000300025 |
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| Issue | 2a |
| Keywords | Strained epitaxial islands Atomistic model Dislocation nucleation |
| Language | English |
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| References | Jónsson, H.; Mills, G.; Jacobsen, K. W.; Berne, B. J. 1998 Budiman, R. A.; Ruda, H.E. 2000; 88 Politi, P.; Grenet, G.; Marty, A.; Ponchet, A.; Villain, J. 2000; 324 Uemura, H.; Uwaha, M.; Saito, Y. 2002; 71 Daruka, I.; Tersoff, J. 2002; 66 2003; 68 Ratsch, C.; Zangwill, A. 1993; 293 Johnson, H.T.; Freund, L.B. 1997; 81 Zhen, S.; Davies, G. J. 1983; A78 Wang, L.G.; Kratzer, P.; Moll, N.; Scheffler, M. 2000; 62 Trushin, O.; Granato, E.; Ying, S.-C.; Kosterlitz, J.M.; Ala-Nissila, T.; Salo, P. 2002; 32 Jalkanen, J.; Trushin, O.; Granato, E.; Ying, S.C.; Ala-Nissila, T. 2005; 72 Spencer, B.J.; Tersoff, J. 2001; 63 Trushin, O.; Granato, E.; Ying, S.-C.; Salo, P.; Ala-Nissila, T. 2002; 65 Ponchet, A.; Le Corre, A.; L'Haridon, H.; Lambert, B.; Salan, S.; Alquier, D.; Lacombe, D.; Durand, L. 1998; 123 Trushin, O.; Granato, E.; Ying, S.-C.; Salo, P.; Ala-Nissila, T. 2002; 232 Daruka, I.; Tersoff, J.; Bara'bási, A.-L. 1999; 82 Tersoff, J.; LeGoues, F.K. 1994; 72 |
| References_xml | – volume: 293 start-page: 123 year: 1993 publication-title: Surf. Sci. contributor: fullname: Ratsch, C.; Zangwill, A. – volume: 123 start-page: 751 year: 1998 publication-title: Appl. Surf. Sci. contributor: fullname: Ponchet, A.; Le Corre, A.; L'Haridon, H.; Lambert, B.; Salan, S.; Alquier, D.; Lacombe, D.; Durand, L. – volume: 71 start-page: 1296 year: 2002 publication-title: J. Phys. Soc. Japan contributor: fullname: Uemura, H.; Uwaha, M.; Saito, Y. – year: 1998 publication-title: Classical and Quantum Dynamics in Condensed Phase Simulations contributor: fullname: Jónsson, H.; Mills, G.; Jacobsen, K. W.; Berne, B. J. – volume: 65 start-page: 241408 (R) year: 2002 publication-title: Phys. Rev. B contributor: fullname: Trushin, O.; Granato, E.; Ying, S.-C.; Salo, P.; Ala-Nissila, T. – volume: 32 start-page: 369 year: 2002 publication-title: Braz. J. Phys. contributor: fullname: Trushin, O.; Granato, E.; Ying, S.-C.; Kosterlitz, J.M.; Ala-Nissila, T.; Salo, P. – volume: 68 start-page: 155413 year: 2003 publication-title: Phys. Rev. B – volume: 62 start-page: 1897 year: 2000 publication-title: Phys. Rev. B contributor: fullname: Wang, L.G.; Kratzer, P.; Moll, N.; Scheffler, M. – volume: 81 start-page: 6081 year: 1997 publication-title: J. Appl. Phys. contributor: fullname: Johnson, H.T.; Freund, L.B. – volume: 324 start-page: 271 year: 2000 publication-title: Phys. Reports contributor: fullname: Politi, P.; Grenet, G.; Marty, A.; Ponchet, A.; Villain, J. – volume: 63 start-page: 205424 year: 2001 publication-title: Phys. Rev. B contributor: fullname: Spencer, B.J.; Tersoff, J. – volume: 66 start-page: 132104 year: 2002 publication-title: Phys. Rev. B contributor: fullname: Daruka, I.; Tersoff, J. – volume: 72 start-page: 3570 year: 1994 publication-title: Phys. Rev. Lett. contributor: fullname: Tersoff, J.; LeGoues, F.K. – volume: 232 start-page: 100 year: 2002 publication-title: Phys. Stat. Sol. B contributor: fullname: Trushin, O.; Granato, E.; Ying, S.-C.; Salo, P.; Ala-Nissila, T. – volume: 88 start-page: 4586 year: 2000 publication-title: J. Appl. Phys. contributor: fullname: Budiman, R. A.; Ruda, H.E. – volume: A78 start-page: 595 year: 1983 publication-title: Phys. Stat. Sol. contributor: fullname: Zhen, S.; Davies, G. J. – volume: 82 start-page: 2753 year: 1999 publication-title: Phys. Rev. Lett. contributor: fullname: Daruka, I.; Tersoff, J.; Bara'bási, A.-L. – volume: 72 start-page: 081403 (R) year: 2005 publication-title: Phys. Rev. B contributor: fullname: Jalkanen, J.; Trushin, O.; Granato, E.; Ying, S.C.; Ala-Nissila, T. |
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| Title | Shape transition and dislocation nucleation in strained epitaxial islands |
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