TITLE

Magnetic orderings in Al nanowires suspended between electrodes

AUTHOR(S)
Ono, Tomoya; Tsukamoto, Shigeru; Hirose, Kikuji
PUB. DATE
June 2003
SOURCE
Applied Physics Letters;6/23/2003, Vol. 82 Issue 25, p4570
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A theoretical analysis of a relation between atomic and spin-electronic structures for the ground state of single-row aluminum nanowires suspended between Al(001) electrodes is demonstrated using first-principles structural optimizations. We obtain an unusual result that a three-aluminum-atom nanowire sandwiched between the electrodes does not manifest magnetic ordering, although an isolated aluminum trimer molecule in a straight line is spin-polarized. On the other hand, a five-atom nanowire exhibits ferromagnetic ordering, where three central atoms form a spin-polarized trimer. Moreover, in the case of an eight-atom nanowire, the middle atoms in the nanowire form two spin-polarized trimers with antiferromagnetic ordering.
ACCESSION #
10024404

 

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