Simultaneous measurements of the torsional oscillator anomaly and thermal conductivity in solid 4He.
Simultaneous measurements of the torsional oscillator anomaly and thermal conductivity in solid 4He.
复制标题
同时测量固体 4He 中的扭转振子异常和热导率。
DOI：
10.1103/physrevlett.107.065302
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发表时间：
2011
影响因子：
8.6
通讯作者：
Zmeev DE
中科院分区：
文献类型：
--
作者：
Zmeev DE
在这些扭振实验中，固体样品通过测量它们的热导率来表征。用阻塞毛细管法在环形容器中生长了高同位素纯度或天然浓度氦的多晶样品，并在退火前后进行了研究。没有相关性已被发现之间的幅度的扭转振荡器的频率和晶体缺陷的量测量的热导率的低温移位。在自然浓度的样品中，在低于120 mK时观察到比通常依赖性大得多的热导率。
In these torsional oscillator experiments, the samples of solidwere characterized by measuring their thermal conductivity. Polycrystalline samples of helium of either high isotopic purity or natural concentration ofwere grown in an annular container by the blocked-capillary method and investigated before and after annealing. No correlation has been found between the magnitude of the low-temperature shift of the torsional oscillator frequency and the amount of crystalline defects as measured by the thermal conductivity. In samples with the naturalconcentration, a substantial excess thermal conductivity over the usualdependence was observed below 120 mK.