Volume 87, Number 6, September 2009
|Number of page(s)||4|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||28 September 2009|
Grain boundary roughening transitions
Bartol Research Institute and Deptartment of Physics and Astronomy, University of Delaware Newark, DE 19716, USA
Corresponding author: email@example.com
Accepted: 3 September 2009
We consider the roughening of small-angle grain boundaries consisting of arrays of dislocations and found two transitions, corresponding to fluctuations of the dislocations along and perpendicular to the boundaries. The latter contributes to a large-scale fluctuation of the orientation of the crystal but the former does not. The transition temperatures of these transitions are very different, with the latter occuring at a much higher temperature. Order-of-magnitude estimates of these temperatures are consistent with recent experimental results from elasticity and X-ray measurements in solid 4He.
PACS: 67.80.-s – Quantum solids
© EPLA, 2009
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