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首页> 外文期刊>Physica, A. Statistical mechanics and its applications >Monte Carlo simulation of quantum effects in ferroelectric phase transitions with increasing zero point energy
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Monte Carlo simulation of quantum effects in ferroelectric phase transitions with increasing zero point energy

机译:零点能量增加时铁电相变中量子效应的蒙特卡罗模拟

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摘要

The Ising model in a transverse field has been used for a long time to describe ferroelectric phase transitions. Quantum tunneling and zero point energy effects in double potential wells have been shown recently to give rise to analogous behavior at the phase transitions. In this work we show that Monte Carlo simulations of the temperature dependence of the order parameter, the susceptibility and the specific heat in Ising like systems with increasing zero point energy describe well the evolution of the phase transition in these systems from classical to quantum, reproducing the behavior of quantum paraelectrics at low temperature. (C) 2002 Published by Elsevier Science B.V. [References: 29]
机译:横向场中的伊辛模型已被使用很长时间来描述铁电相变。最近已经证明,双势阱中的量子隧穿和零点能量效应在相变处引起类似的行为。在这项工作中,我们表明,随着零点能量的增加,伊辛样系统中阶参数,磁化率和比热的温度依赖性的蒙特卡罗模拟很好地描述了这些系统从经典到量子的相变演化。量子顺电材料在低温下的行为。 (C)2002由Elsevier Science B.V.发布[参考:29]

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