Even-Odd Behavior of Conductance in Monatomic Sodium Wires
Journal Article
·
· Physical Review Letters
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{sub 0}(=2e{sup 2}/h) for odd L , independent of the wire geometry, while G is generally smaller than G{sub 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.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40277483
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 87; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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