scholarly journals Phonon mode softening and elastic properties of hafnium under pressure

2018 ◽  
Vol 97 (18) ◽  
Author(s):  
Dmitry Novoselov ◽  
V. I. Anisimov ◽  
Yu. S. Ponosov
Keyword(s):  
Elastic Properties ◽  
Phonon Mode ◽  
Mode Softening

Raman Scattering Studies on Superconducting YBa2Cu3O7−x, Semiconducting YBa2Cu3O6+x, and Possible Impurity Phases

1987 ◽  
Vol 99 ◽  
Author(s):  
A. Mascarenhas ◽  
H. Katayama-Yoshlda ◽  
S. Geller ◽  
J. I. Pánkové ◽  
S. K. Debt
Keyword(s):  
Critical Temperature ◽  
Raman Scattering ◽  
Temperature Dependence ◽  
Phonon Mode ◽  
Group Analysis ◽  
Factor Group ◽  
Anomalous Temperature Dependence ◽  
Anomalous Temperature ◽  
Mode Softening ◽  
Characteristic Lines

ABSTRACTA Raman spectroscopie investigation of specimens of superconducting YBa2Cu3O7−x and semiconducting YBa2Cu3O6+x indicates that in the range 100 to 700 cm-1, the characteristic lines of the superconductor at 13 K, are at 150, 338, 441, 507, 590, and 644 cm-1. Comparison of the Ranan spectra of the superconductor and the semiconductor indicates a mode stiffening of the pair at 338 and 441 cm-1, hut a mode softening of the pair at 507 and 590 cm-1. A factor group analysis leads to a tentative assignment of the Raman and infrared allowed modes. At temperatures 12K < T < 180K the Raman spectra of the superconductor indicate that the phonon mode at 338 cm-1 has an anomalous temperature dependence below the superconducting critical temperature (Tc).

Acoustic phonon mode softening in La3S4

1980 ◽  
Vol 13 (26) ◽  
pp. L697-L702 ◽  
Author(s):  
P J Ford ◽  
W A Lambson ◽  
A J Miller ◽  
G A Saunders ◽  
H Bach ◽  
...  
Keyword(s):  
Acoustic Phonon ◽  
Phonon Mode ◽  
Mode Softening

Phonon mode softening at the ferroelectric transition in Eu0.5Ba0.5TiO3

2010 ◽  
pp. 347-350
Author(s):  
W. N. Rowan-Weetaluktuk ◽  
D. H. Ryan ◽  
A. O. Sushkov ◽  
S. Eckel ◽  
S. K. Lamoreaux ◽  
...  
Keyword(s):  
Phonon Mode ◽  
Ferroelectric Transition ◽  
Mode Softening

Anisotropic vacancy-mediated phonon mode softening in Sm and Gd doped ceria

2018 ◽  
Vol 20 (15) ◽  
pp. 10048-10059 ◽  
Author(s):  
Dong-Hyuk Jung ◽  
Ji-Hwan Lee ◽  
Mehmet Emin Kilic ◽  
Aloysius Soon
Keyword(s):  
First Principles ◽  
Density Functional ◽  
Oxygen Vacancies ◽  
Phonon Mode ◽  
Density Functional Theory Calculations ◽  
Functional Theory ◽  
Mode Softening ◽  
Dynamics Simulations ◽  
And Diffusion ◽  
Diffusion Properties

The structural, vibrational, and diffusion properties of different ceria-based systems (including oxygen vacancies and rare-earth dopants (Sm or Gd)) have been examined using both first-principles density-functional theory calculations and finite-temperature molecular dynamics simulations.

Ultrasonic study of phonon mode softening and melting in indium-thallium alloys

1976 ◽  
Vol 13 (8) ◽  
pp. 3239-3248 ◽  
Author(s):  
D. Y. Chung ◽  
D. J. Gunton ◽  
G. A. Saunders
Keyword(s):  
Phonon Mode ◽  
Ultrasonic Study ◽  
Mode Softening ◽  
Thallium Alloys

A Raman study of phonon mode softening in superconducting and non-superconducting (RE)Ba 2 Cu 3 O 7 for RE = Y,Eu,Pr

1989 ◽  
Vol 162-164 ◽  
pp. 1091-1092 ◽  
Author(s):  
R.M. Macfarlane ◽  
M.C. Krantz ◽  
H.J. Rosen ◽  
V.Y. Lee
Keyword(s):  
Phonon Mode ◽  
Mode Softening ◽  
Raman Study

scholarly journals Pressure-driven significant phonon mode softening and robust superconductivity in layered germanium phosphide

2020 ◽  
Vol 8 (38) ◽  
pp. 20054-20061
Author(s):  
Jingyan Song ◽  
Ge Fei ◽  
Xiaobing Liu ◽  
Shuai Duan ◽  
Bingchao Yang ◽  
...  
Keyword(s):  
Structural Transformation ◽  
Phonon Mode ◽  
Mode Softening ◽  
Pressure Driven

A remarkable pressure-dependent structural transformation that includes significant phonon mode softening and robust superconductivity is discovered in layered 2D GeP5.

Phonon mode softening at the ferroelectric transition in Eu0.5Ba0.5TiO3

2010 ◽  
Vol 198 (1-3) ◽  
pp. 1-4 ◽  
Author(s):  
W. N. Rowan-Weetaluktuk ◽  
D. H. Ryan ◽  
A. O. Sushkov ◽  
S. Eckel ◽  
S. K. Lamoreaux ◽  
...  
Keyword(s):  
Phonon Mode ◽  
Ferroelectric Transition ◽  
Mode Softening
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