The unusual properties of anisotropic systems of quasiparticles in superfluid He4
| Autor: | Adrian F. G. Wyatt, K. E. Nemchenko, V. A. Slipko, I. N. Adamenko |
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| Rok vydání: | 2007 |
| Předmět: |
Physics
Physics and Astronomy (miscellaneous) Condensed matter physics Phonon General Physics and Astronomy Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Roton Superfluidity Condensed Matter::Materials Science Distribution function Condensed Matter::Superconductivity Quasiparticle Condensed Matter::Strongly Correlated Electrons Anisotropy Isotopes of helium Superfluid helium-4 |
| Zdroj: | Low Temperature Physics. 33:767-773 |
| ISSN: | 1090-6517 1063-777X |
| Popis: | We discuss a number of unusual phenomena discovered recently in anisotropic quasiparticle systems in superfluid He4. These include the creation of high-energy phonons by a pulse of low-energy phonons, the suprathermal distribution of high-energy phonons in long phonon pulses, the mesa shape of the angular distribution of low-energy phonons, and the creation of a “hot line” when two-phonon pulses cross. The thermodynamic properties of anisotropic quasiparticle systems of He II are derived for all degrees of anisotropy. |
| Databáze: | OpenAIRE |
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