Generation efficiencies for propagating modes in a supersolid

Article

关键词: SOLID HE-4;    HCP HE-4;    CRYSTALS;    HELIUM;    SUPERFLUID;   

DOI  :  10.1103/PhysRevB.82.094519

来源: SCIE

【 摘 要 】

Using Andreev and Lifshitz's supersolid hydrodynamics, we obtain the propagating longitudinal modes at nonzero applied pressure P(a) (necessary for solid (4)He), and their generation efficiencies by heaters and transducers. For small P(a), a solid develops an internal pressure P similar to P(a)(2). This theory has stress contributions both from the lattice and an internal pressure P. Because both types of stress are included, the normal-mode analysis differs from previous works. Not surprisingly, transducers are significantly more efficient at producing elastic waves and heaters are significantly more efficient at producing fourth sound waves. We take the system to be isotropic, which should apply to systems that are glassy or consist of many crystallites; the results should also apply, at least qualitatively, to single-crystal hcp (4)He.

【 授权许可】

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