Parameter-free quasiclassical boundary conditions for superfluid3He at rough walls. B-phase order parameter and density of states

Autor:	N. B. Kopnin, Martti M. Salomaa, P. I. Soininen
Rok vydání:	1991
Předmět:	Physics Work (thermodynamics) Mathematical analysis Condensed Matter Physics Atomic and Molecular Physics and Optics Action (physics) Superfluidity Quantum mechanics Phase (matter) Quasiparticle Density of states General Materials Science Boundary value problem Isotopes of helium
Zdroj:	Journal of Low Temperature Physics. 85:267-282
ISSN:	1573-7357 0022-2291
Popis:	Parameter-free boundary conditions are discussed for the quasiclassical Green's functions at a rough wall. These conditions have a closed form: all information specific to the wall is eliminated under the assumption that the impurity layer covering the wall is much thicker than the mean-free path of quasiparticles. To demonstrate them in action we calculate the3He-B order parameter and the density of states, and compare them with previous work. Our main conclusion is that the new boundary conditions give qualitatively similar density of states as the “thin-impurity-layer” model, but different from that of the “randomly-rippled-wall” model. Moreover, our approach, being much simpler, allows us to resolve the fine structure of quasiparticle resonances which has not been reported earlier.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::70ad1e376e71e8c359321758868d8c8f https://doi.org/10.1007/bf00681972 Zobrazit plný text záznamu Full text from SpringerLink