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Decrease of soft vibrational modes with increasing density of two‐level states in the metallic glass Zr‐Rh
Author(s) -
Junge B.,
Gey W.
Publication year - 1996
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.2065080702
Subject(s) - materials science , condensed matter physics , superconductivity , phonon , rhodium , amorphous metal , metal , density of states , degrees of freedom (physics and chemistry) , thermodynamics , physics , alloy , chemistry , composite material , metallurgy , biochemistry , catalysis
Experiments are reported on the specific heat below 1 K of 13 melt quenched ZrRh alloys in the superconducting state (T c >4.2 K) where electronic degrees of freedom are frozen out. Large differences of the quasilinear (two‐level system, TLS) contributions given by λ TLS occur with no correlation to the rhodium concentration. The coefficient α of the cubic, phonon‐type term is found to decrease with the density of TLS for this metallic glass. This is counter‐intuitive to the soft‐potential model and differs from the relation found for insulating glasses.