Výsledky vyhledávání - "Jalkanen, J."

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Stress release mechanisms for Cu on Pd(111) in the submonolayer and monolayer regimes

Autor: Jalkanen, J., Rossi, G., Trushin, O., Granato, E., Ala-Nissila, T., Ying, S. C.

Publikováno v: Phys. Rev. B 81, (2010) 041412(R)

We study the strain relaxation mechanisms of Cu on Pd(111) up to the monolayer regime using two different computational methodologies, basin-hopping global optimization and energy minimization with a repulsive bias potential. Our numerical results ar

Externí odkaz: http://arxiv.org/abs/1002.3224

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Two Approaches to Dislocation Nucleation in the Supported Heteroepitaxial Equilibrium Islanding Phenomenon

Autor: Jalkanen, J., Trushin, O., Elder, K., Granato, E., Ying, S. C., Ala-Nissila, T.

Publikováno v: J. Phys.: Conf. Ser. 100 (2008) 072043

We study the dislocation formation in 2D nanoscopic islands with two methods, the Molecular Static method and the Phase Field Crystal method. It is found that both methods indicate the same qualitative stages of the nucleation process. The dislocatio

Externí odkaz: http://arxiv.org/abs/0812.0731

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Equilibrium Shape and Size of Supported Heteroepitaxial Nanoislands

Autor: Jalkanen, J., Trushin, O., Granato, E., Ying, S. C., Ala-Nissila, T.

Publikováno v: Eur. Phys. J. B 66 (2008) 175-183

We study the equilibrium shape, shape transitions and optimal size of strained heteroepitaxial nanoislands with a two-dimensional atomistic model using simply adjustable interatomic pair potentials. We map out the global phase diagram as a function o

Externí odkaz: http://arxiv.org/abs/0812.0711

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Equilibrium shape and dislocation nucleation in strained epitaxial nanoislands

Autor: Jalkanen, J., Trushin, O., Granato, E., Ying, S. C., Ala-Nissila, T.

Publikováno v: Phys. Rev. B 72, 081403 (R) (2005)

We study numerically the equilibrium shapes, shape transitions and dislocation nucleation of small strained epitaxial islands with a two-dimensional atomistic model, using simple interatomic pair potentials. We first map out the phase diagram for the

Externí odkaz: http://arxiv.org/abs/cond-mat/0510107

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First-principles calculations of spin spirals in Ni2MnGa and Ni2MnAl

Autor: Enkovaara, J., Ayuela, A., Jalkanen, J., Nordstrom, L., Nieminen, R. M.

We report here non-collinear magnetic configurations in the Heusler alloys Ni2MnGa and Ni2MnAl which are interesting in the context of the magnetic shape memory effect. The total energies for different spin spirals are calculated and the ground state

Externí odkaz: http://arxiv.org/abs/cond-mat/0210482

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