scholarly journals Neutron scattering measurements of the phonon density of states ofFeSe1−xsuperconductors

2009 ◽  
Vol 79 (1) ◽  
Author(s):  
D. Phelan ◽  
J. N. Millican ◽  
E. L. Thomas ◽  
J. B. Leão ◽  
Y. Qiu ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Density Of States ◽  
Phonon Density ◽  
Phonon Density Of States ◽  
Scattering Measurements

PHONON DENSITY OF STATES IN THE SUPERCONDUCTING Y-Ba-Cu-O SYSTEM

1989 ◽  
Vol 03 (01) ◽  
pp. 55-59
Author(s):  
J.H. RUAN ◽  
A.S. YU ◽  
J. QIN ◽  
C. GOU ◽  
T.H. YANG ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Neutron Scattering ◽  
Density Of States ◽  
Inelastic Neutron Scattering ◽  
Meissner Effect ◽  
Inelastic Neutron ◽  
Scattering Method ◽  
Phonon Density ◽  
Large Decrease ◽  
Phonon Density Of States

The generalized phonon density of states for the high-T c superconductor YBa 2 Cu 3 O 7.1 with high Meissner effect (50%) and for its retreated sample with low Meissner effect (15%) at T=300 K and T=86 K respectively was measured by using inelastic neutron scattering method. The density of states of the superconductor YBa 2 Cu 3 O 7.1 at temperatures of both 300 K and 86 K shows a similar energy spectrum below 95 meV. However, above this energy there are evident softening of modes at 86 K. In addition, a large decrease of 92 meV peak in the density of states for a sample with lower Meissner effect was observed, this effect is supposed to be a result of an increase of vacancies on O 4 site.

Phonon density of states of tetracyanoethylene from coherent inelastic neutron scattering at Dhruva reactor

Pramana ◽  
1989 ◽  
Vol 33 (5) ◽  
pp. 595-602 ◽  
Author(s):  
S L Chaplot ◽  
R Mukhopadhyay ◽  
P R Vijayaraghavan ◽  
A S Deshpande ◽  
K R Rao
Keyword(s):  
Neutron Scattering ◽  
Density Of States ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Phonon Density ◽  
Phonon Density Of States
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