Volume 53, Number 3, February 2001
|Page(s)||342 - 347|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 December 2003|
Mode-locking of incommensurate phase by quantum zero-point energy in the Frenkel-Kontorova model
Department of Physics and Centre for Nonlinear Studies
Hong Kong Baptist University, PRC
2 Department of Physics, University of Houston - Houston TX 77204, USA
3 Department of Physics, National University of Singapore - 119620 Singapore
4 Department of Physics, Lanzhou University - 730000 Lanzhou, PRC
Corresponding author: email@example.com
Accepted: 30 November 2000
In this paper, it is shown that a configuration-modulated system described by the Frenkel-Kontorova model can be locked at an incommensurate phase when the quantum zero-point energy is taken into account. It is also found that the specific heat for an incommensurate phase shows a different parameter dependence in the sliding phase and pinning phase. These findings provide a possible way for experimentalists to verify the phase transition by breaking of analyticity.
PACS: 64.70Rh – Commensurate-incommensurate transitions / 63.70+h – Statistical mechanics of lattice vibrations and displacive phase transitions / 05.50+q – Lattice theory and statistics (Ising, Potts, etc.)
© EDP Sciences, 2001
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