Optical and electron energy-loss spectra of Si(111)2 × 1

A. Selloni; R. Del Sole

doi:10.1016/0039-6028(86)90833-2

Optical and electron energy-loss spectra of Si(111)2 × 1

A. Selloni, R. Del Sole

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

36 Scopus citations

Abstract

We present a method to evaluate the surface reflectivity and use it for Si(111)2 × 1. Beside the strong anisotropic peak at ≈0.5 eV, we discuss the origin of the structures observed experimentally in the range 1 ≲ h {combining short stroke overlay}ω ≲ 4 eV. We find that a large contribution to these structures comes from surface-assisted, bulk-like, non-direct transitions. A simplified model of surface dielectric tensor - valid in the range < {combining short stroke overlay}omega; ≲ 1 eV - is derived, and applied to discuss electron energy-loss spectra with various primary beam energies E₀. In particular we suggest an interpretation of the double-peaked structure occuring at low E₀ values.

Original language	English (US)
Pages (from-to)	35-45
Number of pages	11
Journal	Surface Science
Volume	168
Issue number	1-3
DOIs	https://doi.org/10.1016/0039-6028(86)90833-2
State	Published - Mar 3 1986
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/0039-6028(86)90833-2

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@article{2d18810367914ab98b0aa6c116f374f6,

title = "Optical and electron energy-loss spectra of Si(111)2 × 1",

abstract = "We present a method to evaluate the surface reflectivity and use it for Si(111)2 × 1. Beside the strong anisotropic peak at ≈0.5 eV, we discuss the origin of the structures observed experimentally in the range 1 ≲ h {combining short stroke overlay}ω ≲ 4 eV. We find that a large contribution to these structures comes from surface-assisted, bulk-like, non-direct transitions. A simplified model of surface dielectric tensor - valid in the range < {combining short stroke overlay}omega; ≲ 1 eV - is derived, and applied to discuss electron energy-loss spectra with various primary beam energies E0. In particular we suggest an interpretation of the double-peaked structure occuring at low E0 values.",

author = "A. Selloni and {Del Sole}, R.",

note = "Funding Information: One of us (A S ) acknowledgetsh e hospitalityo t the IBM Scientific Center ot Rome, where part of the calculationso f this work were performed We thank P Chlaradla, S D'Addato, S Nannarone and S Selcl for helpful discussions The collaborationo f P Marsella during the early stages of this work is acknowledged This research has been supported as part of the GNSM Coordinated Nattonal Program, under grants of the Ministry of Education and CNR",

year = "1986",

month = mar,

day = "3",

doi = "10.1016/0039-6028(86)90833-2",

language = "English (US)",

volume = "168",

pages = "35--45",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

number = "1-3",

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TY - JOUR

T1 - Optical and electron energy-loss spectra of Si(111)2 × 1

AU - Selloni, A.

AU - Del Sole, R.

N1 - Funding Information: One of us (A S ) acknowledgetsh e hospitalityo t the IBM Scientific Center ot Rome, where part of the calculationso f this work were performed We thank P Chlaradla, S D'Addato, S Nannarone and S Selcl for helpful discussions The collaborationo f P Marsella during the early stages of this work is acknowledged This research has been supported as part of the GNSM Coordinated Nattonal Program, under grants of the Ministry of Education and CNR

PY - 1986/3/3

Y1 - 1986/3/3

N2 - We present a method to evaluate the surface reflectivity and use it for Si(111)2 × 1. Beside the strong anisotropic peak at ≈0.5 eV, we discuss the origin of the structures observed experimentally in the range 1 ≲ h {combining short stroke overlay}ω ≲ 4 eV. We find that a large contribution to these structures comes from surface-assisted, bulk-like, non-direct transitions. A simplified model of surface dielectric tensor - valid in the range < {combining short stroke overlay}omega; ≲ 1 eV - is derived, and applied to discuss electron energy-loss spectra with various primary beam energies E0. In particular we suggest an interpretation of the double-peaked structure occuring at low E0 values.

AB - We present a method to evaluate the surface reflectivity and use it for Si(111)2 × 1. Beside the strong anisotropic peak at ≈0.5 eV, we discuss the origin of the structures observed experimentally in the range 1 ≲ h {combining short stroke overlay}ω ≲ 4 eV. We find that a large contribution to these structures comes from surface-assisted, bulk-like, non-direct transitions. A simplified model of surface dielectric tensor - valid in the range < {combining short stroke overlay}omega; ≲ 1 eV - is derived, and applied to discuss electron energy-loss spectra with various primary beam energies E0. In particular we suggest an interpretation of the double-peaked structure occuring at low E0 values.

UR - http://www.scopus.com/inward/record.url?scp=0012650235&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0012650235&partnerID=8YFLogxK

U2 - 10.1016/0039-6028(86)90833-2

DO - 10.1016/0039-6028(86)90833-2

M3 - Article

AN - SCOPUS:0012650235

SN - 0039-6028

VL - 168

SP - 35

EP - 45

JO - Surface Science

JF - Surface Science

IS - 1-3

ER -

Optical and electron energy-loss spectra of Si(111)2 × 1

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All Science Journal Classification (ASJC) codes

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