多孔金中急冷固态氦的非经典响应
Non-Classical Response from Quench-Cooled Solid Helium Confined in Porous Gold
摘要：
研究了多孔金中固体~ 4 He对扭振的非经典响应。当固态氦快速生长时，近7%的固态氦在低于约200 mK时似乎与振荡解耦。耗散出现在解耦显示最大变化的温度下。相反，在缓慢生长的固体氦中，去耦大大减少。本文还研究了固体氦在振幅突然增大时的动态响应。在共振周期位移的扩展松弛，表明出现的钉扎的低能量激发，观察到低于非经典响应的起始温度。位错或玻璃固体的运动被限制在纠缠的窄孔中，并且不太可能是周期移位和长弛豫的原因。
英文摘要：
We have investigated the non-classical response of solid 4He confined in porous gold set to torsional oscillation. When solid helium is grown rapidly, nearly 7% of the solid helium appears to be decoupled from the oscillation below about 200 mK. Dissipation appears at temperatures where the decoupling shows maximum variation. In contrast, the decoupling is substantially reduced in slowly grown solid helium. The dynamic response of solid helium was also studied by imposing a sudden increase in the amplitude of oscillation. Extended relaxation in the resonant period shift, suggesting the emergence of the pinning of low energy excitations, was observed below the onset temperature of the non-classical response. The motion of a dislocation or a glassy solid is restricted in the entangled narrow pores and is not likely responsible for the period shift and long relaxation.
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。
