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Supersolidity of helium-4: Disordered scenarios

机译:氦4的超坚固性:无序情况

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The discovery of the phenomenon of supersolidity in helium, a non-dissipative transport of He-4-atoms through He-4-crystals, is an amazing achievement in the low-temperature physics. A microscopic interpretation of the phenomenon of non-classical rotational inertia originally discovered by Kim and Chan remains highly controversial. The only direct observation of a superflow through solid He-4 is the one reported recently by Ray and Hallock. First-principle simulations by Amherst-ETH-Alberta-CUNY collaboration, while unquestionably showing that a perfect hcp He-4 crystal is not a supersolid, reveal disordered mechanisms of supersoliclity: superfluid dislocations, grain boundaries, and ridges. Also possible is a metastable amorphous supersolid, the so-called superglass.
机译:在低温物理学中,氦超固现象的发现是氦4原子通过氦4晶体的非耗散传输,这是令人惊奇的成就。金和陈最初发现的非经典旋转惯性现象的微观解释仍然引起很大争议。 Ray和Hallock最近报道了通过固体He-4进行的唯一直接观察。由Amherst-ETH-Alberta-CUNY合作进行的第一性原理模拟毫无疑问地表明,完美的hcp He-4晶体不是超固体,却揭示了无序超顺性机理:超流体位错,晶界和脊。亚稳态无定形超固体,也就是所谓的超玻璃也是可能的。

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