| 題目 |
Critical and Glassy Dynamics
in Non-Fermi-Liquid Heavy-Fermion Metals
|
| 講師 |
Professor Douglas MacLaughlin
(Univ. of California, Riverside)
|
| 日時 |
|
| 場所 |
コラボレーションセンター ３階 コラボレーション室
（岡山大学津島キャン
パス内 ） |
| 要旨 |
Landau's Fermi-liquid paradigm breaks down in a number of
strongly-correlated electron metals, thereby raising a host of
questions concerning the resulting non-Fermi-liquid (NFL) phenomena.
Nuclear and muon spin relaxation experiments in f-electron
heavy-fermion NFL metals indicate that structural disorder can be a
major factor in NFL behavior. Low-field muon spin relaxation rates are
strongly correlated with the residual resistivity, becoming very weak
in ordered NFL compounds. This low-frequency spectral weight buildup in
disordered NFL systems is similar to that observed in spin glasses
above the glass temperature, and suggests quantum spin-glass behavior
because no glass transition is observed down to the lowest temperatures
(20 mK).
|
|
|
| 世話人 |
理学部物理学科 町田一成
(TEL: 086-251-7814）
|
