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Magnetic-Field Dependence of Novel Gap Behavior Related to the Quantum-Size Effect

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arxiv 2007.07688 v1 pith:K2YHYZV5 submitted 2020-07-15 cond-mat.mtrl-sci

Tomonori Okuno , Yuta Kinoshita , Satoshi Matsuzaki , Shunsaku Kitagawa , Kenji Ishida , Michihiro Hirata , Takahiko Sasaki , Kohei Kusada
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Hiroshi Kitagawa
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classification cond-mat.mtrl-sci
keywords dependencemagnetic-fieldnanoparticlesraterelaxationappearanceapproximatelybehavior
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abstract

$^{195}$Pt-NMR measurements of Pt nanoparticles with a mean diameter of 4.0 nm were performed in a high magnetic field of approximately $\mu_0 H = 23.3$ T to investigate the low-temperature electronic state of the nanoparticles. The characteristic temperature $T^*$, below which the nuclear spin-lattice relaxation rate $1/T_1$ deviates from the relaxation rate of the bulk, shows a magnetic-field dependence. This dependence supports the theoretical prediction of the appearance of discrete energy levels.

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