Journal
PHYSICAL REVIEW B
Volume 84, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.224501
Keywords
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Funding
- Academy of Finland
- EU [228464]
- Vaisala Foundation of the Finnish Academy of Science and Letters
- Czech Granting Agency [GACR 202/08/0276]
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We describe the first measurement on Andreev scattering of thermal excitations from a vortex configuration with known density, spatial extent, and orientations in He-3-B superfluid. The heat flow from a blackbody radiator in equilibrium rotation at constant angular velocity is measured with two quartz tuning fork oscillators. One oscillator creates a controllable density of excitations at 0.2T(c) base temperature and the other records the thermal response. The results are compared to numerical calculations of ballistic propagation of thermal quasiparticles through a cluster of rectilinear vortices. We find good agreement which supports the current understanding of Andreev reflection.
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