评“量子晶体的巨塑性”
Comment on "Giant Plasticity of a Quantum Crystal"
摘要：
在他们的信中，Haziot et al. [Phys. Rev. Lett. 110（2013）035301]报道了hcp氦-4量子晶体的巨大塑性的新现象。他们断言氦-4具有经典塑性理论中没有的机械性质。具体来说，他们研究了高质量晶体作为温度和施加应变的函数，其中剪切模量达到平台，耗散接近于零;据报道，这两个量与应力和应变无关，这意味着可逆的耗散过程和量子隧穿。在这篇评论中，我们表明，这些签名可以用热激活位错滑移的经典模型来解释，而不需要调用量子隧穿或无耗散运动。最近，我们提出了一个固体氦-4中的位错滑移模型，该模型包含在存在具有定性相似行为的其他位错的情况下的耗散贡献[Zhou等人，Philos. Mag. Lett. 92（2012）608]。
英文摘要：
In their Letter, Haziot et al. [Phys. Rev. Lett. 110 (2013) 035301] report a novel phenomenon of giant plasticity for hcp Helium-4 quantum crystals. They assert that Helium-4 exhibits mechanical properties not found in classical plasticity theory. Specifically, they examine high-quality crystals as a function of temperature and applied strain, where the shear modulus reaches a plateau and dissipation becomes close to zero; both quantities are reported to be independent of stress and strain, implying a reversible dissipation process and quantum tunneling. In this Comment, we show that these signatures can be explained with a classical model of thermally activated dislocation glide without the need to invoke quantum tunneling or dissipationless motion. Recently, we proposed a dislocation glide model in solid Helium-4 containing the dissipation contribution in the presence of other dislocations with qualitatively similar behavior [Zhou et al., Philos. Mag. Lett. 92 (2012) 608].
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
