Impact of opal nanoconfinement on electronic properties of sodium particles: NMR studies

E. V. Charnaya; M. K. Lee; L. J. Chang; Yu A. Kumzerov; A. V. Fokin; M. I. Samoylovich; A. S. Bugaev

doi:10.1016/j.physleta.2014.12.028

Impact of opal nanoconfinement on electronic properties of sodium particles: NMR studies

E. V. Charnaya, M. K. Lee, L. J. Chang, Yu A. Kumzerov, A. V. Fokin, M. I. Samoylovich, A. S. Bugaev

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4 Citations (Scopus)

Abstract

The ²³Na Knight shift of NMR line which is highly correlated with the electron spin susceptibility and density of states at the Fermi level was studied for the sodium loaded opal. The measurements were carried out within a temperature range from 100 to 400 K for solid and melted confined sodium nanoparticles. The NMR line below 305 K was a singlet with the Knight shift reduced compared to that in bulk. Above this temperature the NMR line split reproducibly into two components with opposite trends in the Knight shift temperature dependences which evidenced a nanoconfinement-induced transformation and heterogeneity in the electron system. The findings were suggested to be related to changes in the topology of the Fermi surface.

Original language	English
Pages (from-to)	705-709
Number of pages	5
Journal	Physics Letters, Section A: General, Atomic and Solid State Physics
Volume	379
Issue number	7
DOIs	https://doi.org/10.1016/j.physleta.2014.12.028
Publication status	Published - 2015 Mar 20

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1016/j.physleta.2014.12.028

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title = "Impact of opal nanoconfinement on electronic properties of sodium particles: NMR studies",

abstract = "The 23Na Knight shift of NMR line which is highly correlated with the electron spin susceptibility and density of states at the Fermi level was studied for the sodium loaded opal. The measurements were carried out within a temperature range from 100 to 400 K for solid and melted confined sodium nanoparticles. The NMR line below 305 K was a singlet with the Knight shift reduced compared to that in bulk. Above this temperature the NMR line split reproducibly into two components with opposite trends in the Knight shift temperature dependences which evidenced a nanoconfinement-induced transformation and heterogeneity in the electron system. The findings were suggested to be related to changes in the topology of the Fermi surface.",

author = "Charnaya, {E. V.} and Lee, {M. K.} and Chang, {L. J.} and Kumzerov, {Yu A.} and Fokin, {A. V.} and Samoylovich, {M. I.} and Bugaev, {A. S.}",

note = "Funding Information: The authors acknowledge the financial support from NCKU (Taiwan) under grant 101-2112-M-006-010-MY3 and RFBR (Russia) under grants 13-07-00157 and 14-52-12010 . The SEM measurements were carried out on in IRC for Nanotechnology, SPbGU (Russia). Publisher Copyright: {\textcopyright} 2014 Elsevier B.V. All rights reserved.",

year = "2015",

month = mar,

day = "20",

doi = "10.1016/j.physleta.2014.12.028",

language = "English",

volume = "379",

pages = "705--709",

journal = "Physics Letters, Section A: General, Atomic and Solid State Physics",

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T1 - Impact of opal nanoconfinement on electronic properties of sodium particles

T2 - NMR studies

AU - Charnaya, E. V.

AU - Lee, M. K.

AU - Chang, L. J.

AU - Kumzerov, Yu A.

AU - Fokin, A. V.

AU - Samoylovich, M. I.

AU - Bugaev, A. S.

N1 - Funding Information: The authors acknowledge the financial support from NCKU (Taiwan) under grant 101-2112-M-006-010-MY3 and RFBR (Russia) under grants 13-07-00157 and 14-52-12010 . The SEM measurements were carried out on in IRC for Nanotechnology, SPbGU (Russia). Publisher Copyright: © 2014 Elsevier B.V. All rights reserved.

PY - 2015/3/20

Y1 - 2015/3/20

N2 - The 23Na Knight shift of NMR line which is highly correlated with the electron spin susceptibility and density of states at the Fermi level was studied for the sodium loaded opal. The measurements were carried out within a temperature range from 100 to 400 K for solid and melted confined sodium nanoparticles. The NMR line below 305 K was a singlet with the Knight shift reduced compared to that in bulk. Above this temperature the NMR line split reproducibly into two components with opposite trends in the Knight shift temperature dependences which evidenced a nanoconfinement-induced transformation and heterogeneity in the electron system. The findings were suggested to be related to changes in the topology of the Fermi surface.

AB - The 23Na Knight shift of NMR line which is highly correlated with the electron spin susceptibility and density of states at the Fermi level was studied for the sodium loaded opal. The measurements were carried out within a temperature range from 100 to 400 K for solid and melted confined sodium nanoparticles. The NMR line below 305 K was a singlet with the Knight shift reduced compared to that in bulk. Above this temperature the NMR line split reproducibly into two components with opposite trends in the Knight shift temperature dependences which evidenced a nanoconfinement-induced transformation and heterogeneity in the electron system. The findings were suggested to be related to changes in the topology of the Fermi surface.

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JF - Physics Letters, Section A: General, Atomic and Solid State Physics

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Impact of opal nanoconfinement on electronic properties of sodium particles: NMR studies

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