Strong Coupling in Conserved Surface Roughening: A New Universality Class?
Strong Coupling in Conserved Surface Roughening: A New Universality Class?
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保守表面粗糙化中的强耦合:新的普遍性类别?
DOI:
10.1103/physrevlett.121.020601
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发表时间:
2018
影响因子:
8.6
通讯作者:
Caballero F
中科院分区:
文献类型:
--
作者:
Caballero F
The Kardar-Parisi-Zhang (KPZ) equation defines the main universality class for nonlinear growth and roughening of surfaces. But under certain conditions, a conserved KPZ equation (CKPZ) is thought to set the universality class instead. This has non-mean-field behavior only in spatial dimension. We point out here that CKPZ is incomplete: It omits a symmetry-allowed nonlinear gradient term of the same order as the one retained. Adding this term, we find a parameter regime where the one-loop renormalization group flow diverges. This suggests a phase transition to a new growth phase, possibly ruled by a strong-coupling fixed point and thus described by a new universality class, for any. In this phase, numerical integration of the model ingives clear evidence of non-mean-field behavior.
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Physical Review A. Atomic, Molecular, and Optical Physics
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