Even-odd behavior of conductance in monatomic sodium wires

With the aid of the Friedel sum rule, we perform first-principles calculations of conductances through monatomic Na wires, taking into account the sharp tip geometry and discrete atomic structure of electrodes. We find that conductances (G) depend on the number (L) of atoms in the wires; G is G(0)(= 2e(2)/h) for odd L, independent of the wire geometry, while G is generally smaller than G(0) and sensitive to the wire structure for even L. This even-odd behavior is attributed to the charge neutrality and resonant character due to the sharp tip structure. We suggest that similar even-odd behavior may appear in other monovalent atomic wires.
Publisher
AMERICAN PHYSICAL SOC
Issue Date
2001-08
Language
English
Keywords

SIZED POINT-CONTACT; QUANTIZED CONDUCTANCE; ATOMIC WIRES; BALLISTIC-RESISTANCE; GOLD NANOWIRES; TRANSPORT; TRANSMISSION; SIGNATURE; CHANNELS; PSEUDOPOTENTIALS

Citation

PHYSICAL REVIEW LETTERS, v.87, no.9, pp.096803 - 096803

ISSN
0031-9007
URI
http://hdl.handle.net/10203/22005
Appears in Collection
PH-Journal Papers(저널논문)
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