Experiments on the Faceting and Supersolidity in Helium Crystals
نویسنده
چکیده
OF DOCTORAL DISSERTATION HELSINKI UNIVERSITY OF TECHNOLOGY P. O. BOX 1000, FI-02015 TKK http://www.tkk.fi Author Heikki Junes Name of the dissertation Manuscript submitted October 31, 2008 Manuscript revised December 30, 2008 Date of the defence February 20, 2009 Article dissertation (summary + original articles) Monograph Faculty Department Field of research Opponent(s) Supervisor Instructor
منابع مشابه
Thermodynamics of an incommensurate quantum crystal.
We present a theory of the thermodynamics of an incommensurate quantum solid. The ground state of the solid is assumed to be an incommensurate crystal, with quantum zero-point vacancies and interstitials and thus a non-integer number of atoms per unit cell. We show that at low temperature T, the variation of the net vacancy concentration should be as T4 and that the first correction to the spec...
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Superfluidity, liquid flow without friction, is familiar in helium. The first evidence for “supersolidity”, its analogue in quantum solids, came from recent torsional oscillator (TO) measurements 1,2 involving 4 He. At temperatures below 200 mK, TO frequencies increased, suggesting that some of the solid decoupled from the oscillator. This behavior has been replicated by several groups 3,4,5,6,...
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تاریخ انتشار 2009