Spin Uncoupling in Free Nb Clusters: Support for Nascent Superconductivity | Zendy

Ramiro Moro | Zendy; Shuangye Yin | Zendy; Xiaoshan Xu | Zendy; Walt A. de Heer | Zendy

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Spin Uncoupling in Free Nb Clusters: Support for Nascent Superconductivity

Author(s) -

Ramiro Moro,

Shuangye Yin,

Xiaoshan Xu,

Walt A. de Heer

Publication year - 2004

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.93.086803

Subject(s) - condensed matter physics , superconductivity , spin states , spin (aerodynamics) , cluster (spacecraft) , materials science , relaxation (psychology) , physics , psychology , social psychology , computer science , thermodynamics , programming language

Molecular beam Stern-Gerlach deflection measurements on Nb clusters (Nb(N), N<100) show that at very low temperatures the odd-N clusters deflect due to a single unpaired spin that is uncoupled from the cluster. At higher temperatures the spin is coupled and no deflections are observed. Spin uncoupling occurs concurrently with the transition to the recently found ferroelectric state, which has superconductor characteristics [Science 300, 1265 (2003)]]. Spin uncoupling (also seen in V, Ta, and Al clusters) is analogous to the reduction of spin-relaxation rates observed in bulk superconductors below T(c).

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