TY - JOUR
T1 - Rattling motion in β-pyrochlore compounds explored by the millimeter-wave conductivity measurement
AU - Maeda, Atsutaka
AU - Oba, Kentaro
AU - Imai, Yoshinori
AU - Yamaura, Jun Ichi
AU - Hiroi, Zenji
PY - 2010/12
Y1 - 2010/12
N2 - Complex conductivity is investigated at 19 GHz and 44 GHz in the normal state in β-pyrochlore materials, AOs2O6 (A = Cs, Rb and K). In Cs material, large enhancement of the quasiparticle (QP) scattering time, τ, is observed at low temperatures, whereas there is no such enhancement in Rb and K materials. This indicates that rattling motion is absent in Cs material, whether in K and Rb materials it plays the role as a scatterer for QPs. In Rb materials, we find charge excitation possibly originated from the rattling motion.
AB - Complex conductivity is investigated at 19 GHz and 44 GHz in the normal state in β-pyrochlore materials, AOs2O6 (A = Cs, Rb and K). In Cs material, large enhancement of the quasiparticle (QP) scattering time, τ, is observed at low temperatures, whereas there is no such enhancement in Rb and K materials. This indicates that rattling motion is absent in Cs material, whether in K and Rb materials it plays the role as a scatterer for QPs. In Rb materials, we find charge excitation possibly originated from the rattling motion.
KW - β-Pyrochlore compounds
KW - Cavity perturbation
KW - Millimeter-wave conductivity
KW - Rattling
KW - Superconductivity
UR - http://www.scopus.com/inward/record.url?scp=78649750406&partnerID=8YFLogxK
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U2 - 10.1016/j.physc.2009.11.102
DO - 10.1016/j.physc.2009.11.102
M3 - Article
AN - SCOPUS:78649750406
SN - 0921-4534
VL - 470
SP - S699-S700
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - SUPPL.1
ER -