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Journal Articles

Phonon anomaly on Na$$_x$$HfNCl superconductors with ${it T}$$$_c$$=22 K

Shamoto, Shinichi; Hirai, Atsuo*; Yamanaka, Shoji*; Aso, Naofumi*; Kajitani, Tsuyoshi*

Journal of Neutron Research, 12(4), p.295 - 300, 2004/12

Inelastic neutron scattering measurements have been performed on superconducting Na$$_x$$HfNCl powder samples with x=0.27 and 0.38 (T$$_c$$ =22 K). We have observed several temperature dependent phonon anomalies, e.g., at E=15, 29, 76, and 81 meV for the former sample. A phonon peak with E=14.5 meV at Q=6 $AA $^{-1}$$ increases for both samples with decreasing temperature below T=40 K, which is much higher than T$$_c$$. The phonon peak is assigned to an ab-plane vibrational mode, E$$_u$$, of chlorine and hafnium atoms, which strongly modifies the electronic band structure. The phonon anomaly is discussed in terms of carrier inhomogeneity.

Journal Articles

Unified description of metallic and neutral liquids and plasmas

Chihara, Junzo

Journal of Physics; Condensed Matter, 3, p.8715 - 8744, 1991/00

 Times Cited Count:46 Percentile:10.27(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Electronic structures and X-ray photoelectron spectra of MoO$$_{2}$$ and Li$$_{2}$$MoO$$_{4}$$

;

Chemical Physics Letters, 84(2), p.356 - 360, 1981/00

 Times Cited Count:16 Percentile:44.45(Chemistry, Physical)

no abstracts in English

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