From compact point defects to extended structures in silicon |
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Authors: | Y A Du R G Hennig T J Lenosky J W Wilkins |
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Institution: | (1) Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India |
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Abstract: | We show that in contrast to the 1d Frenkel-Kontorova (FK)
chain known to obey the Fourier law of heat conduction and several
2d models which show logarithmic dependence of conductivity on
system size, a scalar 2d FK lattice with commensurate structure
exhibits anomalous heat conduction, whose thermal conductivity
displays a power law behavior. The dependence of thermal gradient on
bulk temperature and noise correlation is critically analyzed. A
dynamical contribution to conductivity when the system attains a
nonequilibrium steady state of thermal conduction has been
identified. |
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Keywords: | 44 10 +i Heat conduction 05 60 -k Transport processes 05 70 Ln Nonequilibrium and irreversible thermodynamics |
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