NMR-based gap behavior related to the quantum size effect
NMR-based gap behavior related to the quantum size effect
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基于 NMR 的间隙行为与量子尺寸效应相关
DOI:
10.1103/physrevb.101.121406
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发表时间:
2020
影响因子:
3.7
通讯作者:
Kitagawa Hiroshi
中科院分区:
文献类型:
--
作者:
Okuno Tomonori;Manago Masahiro;Kitagawa Shunsaku;Ishida Kenji;Kusada Kohei;Kitagawa Hiroshi
We conducted-NMR measurements on various-diameter Pt nanoparticles coated with polyvinylpyrrolidone in order to detect the quantum size effect and the discrete energy levels in the electron density of states, both of which were predicted by Kubo more than 50 years ago. We succeeded in separating the signals arising from the surface and interior regions and found that the nuclear spin-lattice relaxation rates in both regions show the metallic behavior at high temperatures. Surprisingly, the magnetic fluctuations in both regions exhibited anomalous behavior below the same temperature, which points to a clear size dependence and is well scaled with. These results suggest that a size-tunable metal-insulator transition occurs in the Pt nanoparticles as a result of the quantum size effect.
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影响因子:
--
作者:
A. Clogston;V. Jaccarino;Y. Yafet
通讯作者:
Y. Yafet
影响因子:
1.7
作者:
J. Sone
通讯作者:
J. Sone
DOI:
10.1103/physrevb.31.5663
发表时间:
1985
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
Makowka;Slichter;Sinfelt
通讯作者:
Sinfelt
影响因子:
1.7
作者:
Shun–ichi Kobayashi;Toshihiro Takahashi;W. Sasaki
通讯作者:
W. Sasaki
影响因子:
3.7
作者:
H. Rhodes;P. Wang;C. D. Makowka;S. Rudaz;H. Stokes;C. Slichter;J. Sinfelt
通讯作者:
J. Sinfelt