Pinning effect and the quantum nature of the dislocation motion in the impurity-free solid

无杂质固体中钉扎效应和位错运动的量子本质

• 批准号: 13640360
• 负责人: MIURA Yuichi
• 金额: $ 2.24万
• 依托单位: Department of Physics, Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640360/
• 关键词: Solid ^3He; Fermi solid; Dislocation Motion; Quantum effect; Melting Point

The dislocation motion in most quantum solid, bcc solid ^3He, has been studied. The dislocation line begins to move when the applied strain exceeds the critical value. Solid ^3He is almost an ideal crystal for the study of the dislocation motion because of the facts that the impurities can be removed down to 0.001 ppm and the Peierls potential is tunable by changing the molar-volume of the solid. Therefore, it is possible to study the dislocation motion without the pinning by the impurities.We have measured the shear modulus and the energy dissipation using the high-Q torsional oscillator technique as a function of the strain amplitude. Our oscillator is found to be so sensitive that the shear modulus and the dissipation can be measured at the strain amplitude ranging from 10^<-5> down to 10^<-8>. The molar-volume dependence of the Peieris potential is determined. The pinning effect by the dislocation network nodes is observed. And the anomaly of the shear modulus which is a feature of the solid state has been observed near the melting point.

研究了大多数量子固体--体心立方固体3He中的位错运动。当外加应变超过临界值时，位错线开始移动。固体~3He几乎是研究位错运动的理想晶体，因为杂质可以被去除到0.001 ppm，而且Peierls势可以通过改变固体的摩尔体积来调节。我们用高Q扭转振子技术测量了位错的剪切模数和能量耗散随应变幅值的变化关系。我们发现我们的振荡器非常灵敏，可以在从10^&lt；-5&gt；到10^&lt；-8&gt；的应变幅度范围内测量剪切模数和损耗。确定了Peieris势与摩尔体积的关系。观察到位错网络节点的钉扎效应。在熔点附近观察到了固相的剪切模量值的异常。

项目成果

Y.Miura, Ed.by T.Miyazaki: "Atom Tunneling Phenomena in Quantum Solid and Liquid Helium, Atom Tunneling Phenomena in Physics, Chemistry and Biology, Chapt.5, Vol.36"Springer Series on Atomic, Optical, and Plasma Physics. (2003)

Y.Miura，编者：T.Miyazaki：“量子固体和液氦中的原子隧道现象，物理、化学和生物学中的原子隧道现象，第 5 章，第 36 卷”施普林格原子、光学和等离子体物理系列

Yuichi MIURA: "Atom Tunneling Phenomena in Physics, Chemistry and Biology"Tetsuo Miyazaki(Springer社). 220 (2003)

Yuichi MIURA：“物理、化学和生物学中的原子隧道现象”Tetsuo Miyazaki (Springer) 220 (2003)。

Yuichi MIURA: "Atom Tunneling Phenomena in Physics, Chemistry and Biology"Tetsuo Miyazaki (Springer社). 375 (2003)

Yuichi MIURA：“物理、化学和生物学中的原子隧道现象”Tetsuo Miyazaki (Springer) 375 (2003)。

Yuichi Miura: "Recovering time of the dislocation network Pinning in the bcc solid ^3He"Abstract of the 23^<rd> International Conference On Low Temperature Physics. 282 (2003)

Yuichi Miura：“位错网络钉扎在 bcc 固体 ^3He 中的恢复时间”第 23 届国际低温物理会议摘要。