Atom transfer and single-adatom contacts
The point contact of a tunnel tip approaching towards Ag(111) and Cu(111) surfaces is investigated with a low temperature scanning tunneling microscope. A sharp jump to contact, random in nature, is observed in the conductance. After point contact, the tip-apex atom is transferred to the surface, in...
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| Veröffentlicht in: | Physical review letters 2005-04, Vol.94 (12), p.126102.1-126102.4, Article 126102 |
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| container_end_page | 126102.4 |
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| container_issue | 12 |
| container_start_page | 126102.1 |
| container_title | Physical review letters |
| container_volume | 94 |
| creator | LIMOT, L KRÖGER, J BERNDT, R GARCIA-LEKUE, A HOFER, W. A |
| description | The point contact of a tunnel tip approaching towards Ag(111) and Cu(111) surfaces is investigated with a low temperature scanning tunneling microscope. A sharp jump to contact, random in nature, is observed in the conductance. After point contact, the tip-apex atom is transferred to the surface, indicating that a one-atom contact is formed during the approach. In sharp contrast, the conductance over single silver and copper adatoms exhibits a smooth and reproducible transition from tunneling to contact regime. Numerical simulations show that this is a consequence of the additional dipolar bonding between the adatom and the surface atoms. |
| doi_str_mv | 10.1103/PhysRevLett.94.126102 |
| format | Article |
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| language | eng |
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| source | American Physical Society Journals |
| subjects | Condensed matter: structure, mechanical and thermal properties Electron, ion, and scanning probe microscopy Exact sciences and technology Physics Scanning probe microscopy: scanning tunneling, atomic force, scanning optical, magnetic force, etc Structure of solids and liquids crystallography |
| title | Atom transfer and single-adatom contacts |
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