Bounds for the phonon-roton dispersion in superfluidHe4
نویسندگان
چکیده
منابع مشابه
Phonon-roton modes of liquid 4He beyond the roton in the porous medium MCM-41
R. T. Azuah,1,2 S. O. Diallo,3,* M. A. Adams,4 O. Kirichek,4 and H. R. Glyde3 1NIST Center for Neutron Research, Gaithersburg, Maryland 20899-8562, USA 2Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115, USA 3Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716-2593, USA 4ISIS Spallation Neutron Source, Ruth...
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We present neutron scattering measurements of the phonon-roton excitations of superfluid 4He held at negative pressures from zero to -5 bar. The liquid was stretched to negative pressures by immersing it in the porous medium MCM-41. In the wave vector range 0.35< or =Q< or =1.55 A(-1) and temperature T=0.4 K investigated, the phonon and maxon energies decrease systematically below bulk values a...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1995
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.52.1236