Abstract
A variety of jumps has in the past been identified in diffusion of atoms on 1D channeled surfaces. To establish the jump processes important in diffusion on a 2D surface, the movement of individual Pd atoms has been examined on W(110). From the distribution of displacements of Pd at high temperatures, double jumps are found along the close-packed [Formula presented]. For the first time, sizable differences are also observed between the mean-square displacements along [Formula presented] and [Formula presented], which demonstrate unexpected contributions from jumps along [Formula presented], but not along [Formula presented]. These jumps proceed over activation barriers higher than for single jumps, under conditions predicted from previous work with Pd on the channeled W(211).
| Original language | English |
|---|---|
| Number of pages | 1 |
| Journal | Physical Review Letters |
| Volume | 88 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - 2002 Jan 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Non-Nearest-Neighbor Jumps in 2D Diffusion : Pd on W(110). / Oh, Sang Mun; Koh, Seong Jin; Kyuno, Kentaro; Ehrlich, Gert.
In: Physical Review Letters, Vol. 88, No. 23, 01.01.2002.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Non-Nearest-Neighbor Jumps in 2D Diffusion
T2 - Pd on W(110)
AU - Oh, Sang Mun
AU - Koh, Seong Jin
AU - Kyuno, Kentaro
AU - Ehrlich, Gert
PY - 2002/1/1
Y1 - 2002/1/1
N2 - A variety of jumps has in the past been identified in diffusion of atoms on 1D channeled surfaces. To establish the jump processes important in diffusion on a 2D surface, the movement of individual Pd atoms has been examined on W(110). From the distribution of displacements of Pd at high temperatures, double jumps are found along the close-packed [Formula presented]. For the first time, sizable differences are also observed between the mean-square displacements along [Formula presented] and [Formula presented], which demonstrate unexpected contributions from jumps along [Formula presented], but not along [Formula presented]. These jumps proceed over activation barriers higher than for single jumps, under conditions predicted from previous work with Pd on the channeled W(211).
AB - A variety of jumps has in the past been identified in diffusion of atoms on 1D channeled surfaces. To establish the jump processes important in diffusion on a 2D surface, the movement of individual Pd atoms has been examined on W(110). From the distribution of displacements of Pd at high temperatures, double jumps are found along the close-packed [Formula presented]. For the first time, sizable differences are also observed between the mean-square displacements along [Formula presented] and [Formula presented], which demonstrate unexpected contributions from jumps along [Formula presented], but not along [Formula presented]. These jumps proceed over activation barriers higher than for single jumps, under conditions predicted from previous work with Pd on the channeled W(211).
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U2 - 10.1103/PhysRevLett.88.236102
DO - 10.1103/PhysRevLett.88.236102
M3 - Article
VL - 88
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 23
ER -