STM and ab initio study of holmium nanowires on a Ge(111) surface

C. Eames; C. Bonet; M. I. J. Probert; S. P. Tear; E. W. Perkins

doi:10.1103/PhysRevB.74.193318

STM and ab initio study of holmium nanowires on a Ge(111) surface

C. Eames, C. Bonet, M. I. J. Probert, S. P. Tear, E. W. Perkins

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

A nanorod structure has been observed on the Ho/Ge(111) surface using scanning tunneling microscopy (STM). The rods do not require patterning of the surface or defects such as step edges in order to grow as is the case for nanorods on Si(111). At low holmium coverage the nanorods exist as isolated nanostructures while at high coverage they form a periodic 5x1 structure. We propose a structural model for the 5x1 unit cell and show using an ab initio calculation that the STM profile of our model structure compares favorably to that obtained experimentally for both filled and empty states sampling. The calculated local density of states shows that the nanorod is metallic in character.

Original language	English
Article number	193318
Pages (from-to)	-
Number of pages	4
Journal	Physical Review B
Volume	74
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.74.193318
Publication status	Published - Nov 2006

Keywords

SILICIDE NANOWIRES
SI(001)
SI(111)
GROWTH
ARRAYS
CHAINS

Access to Document

10.1103/PhysRevB.74.193318

http://dx.doi.org/10.1103/PhysRevB.74.193318

Cite this

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title = "STM and ab initio study of holmium nanowires on a Ge(111) surface",

abstract = "A nanorod structure has been observed on the Ho/Ge(111) surface using scanning tunneling microscopy (STM). The rods do not require patterning of the surface or defects such as step edges in order to grow as is the case for nanorods on Si(111). At low holmium coverage the nanorods exist as isolated nanostructures while at high coverage they form a periodic 5x1 structure. We propose a structural model for the 5x1 unit cell and show using an ab initio calculation that the STM profile of our model structure compares favorably to that obtained experimentally for both filled and empty states sampling. The calculated local density of states shows that the nanorod is metallic in character.",

keywords = "SILICIDE NANOWIRES, SI(001), SI(111), GROWTH, ARRAYS, CHAINS",

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T1 - STM and ab initio study of holmium nanowires on a Ge(111) surface

AU - Eames, C.

AU - Bonet, C.

AU - Probert, M. I. J.

AU - Tear, S. P.

AU - Perkins, E. W.

PY - 2006/11

Y1 - 2006/11

N2 - A nanorod structure has been observed on the Ho/Ge(111) surface using scanning tunneling microscopy (STM). The rods do not require patterning of the surface or defects such as step edges in order to grow as is the case for nanorods on Si(111). At low holmium coverage the nanorods exist as isolated nanostructures while at high coverage they form a periodic 5x1 structure. We propose a structural model for the 5x1 unit cell and show using an ab initio calculation that the STM profile of our model structure compares favorably to that obtained experimentally for both filled and empty states sampling. The calculated local density of states shows that the nanorod is metallic in character.

AB - A nanorod structure has been observed on the Ho/Ge(111) surface using scanning tunneling microscopy (STM). The rods do not require patterning of the surface or defects such as step edges in order to grow as is the case for nanorods on Si(111). At low holmium coverage the nanorods exist as isolated nanostructures while at high coverage they form a periodic 5x1 structure. We propose a structural model for the 5x1 unit cell and show using an ab initio calculation that the STM profile of our model structure compares favorably to that obtained experimentally for both filled and empty states sampling. The calculated local density of states shows that the nanorod is metallic in character.

KW - SILICIDE NANOWIRES

KW - SI(001)

KW - SI(111)

KW - GROWTH

KW - ARRAYS

KW - CHAINS

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DO - 10.1103/PhysRevB.74.193318

M3 - Article

SN - 1098-0121

VL - 74

SP - -

JO - Physical Review B

JF - Physical Review B

IS - 19

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