Quasiparticle Interactions in Two-Dimensional H3e on H4e Films

M. Dann, J. Nyéki, B. P. Cowan, and J. Saunders
Phys. Rev. Lett. 82, 4030 – Published 17 May 1999
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Abstract

Measurements are reported of the heat capacity of 3He bound to an atomically layered 4He film on the surface of graphite. At 3He coverages n3<4nm2, the 3He forms a uniform 2D Fermi system. Thereafter with increasing n3 we resolve two steps in the heat capacity, each arising from the formation of a further 2D continuum built on excited surface-normal states. We infer information on the hydrodynamic mass, quasiparticle interactions, and energetics of these states. Both short range repulsive interactions and ripplon mediated quasiparticle interactions are important.

  • Received 28 January 1999

DOI:https://doi.org/10.1103/PhysRevLett.82.4030

©1999 American Physical Society

Authors & Affiliations

M. Dann, J. Nyéki*, B. P. Cowan, and J. Saunders

  • Millikelvin Laboratory, Department of Physics, Royal Holloway University of London, Egham, Surrey, TW20 0EX, United Kingdom

  • *Permanent address: Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovak Republic.

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Vol. 82, Iss. 20 — 17 May 1999

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