Electron Energy Loss Spectra and Overestimation of Inelastic Mean Free Paths in Many-Pole Models

被引：33

作者：

Bourke, Jay D. ^{[1
]}

Chantler, Christopher T. ^{[1
]}

机构：

[1] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2012年 / 116卷 / 12期

关键词：

D O I：

10.1021/jp210097v

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigate established theoretical approaches for the determination of electron energy loss spectra (EELS) and inelastic mean free paths (IMFPs) in solids. In particular, we investigate effects of alternate descriptions of the many plasmon resonances that define the energy loss function (ELF), and the contribution of lifetime broadening in these resonances to the IMFP. We find that despite previously claimed agreement between approaches, approximations of different models consistently conspire to underestimate electron scattering for energies below 100 eV, leading to significant overestimates of the IMFP in this regime.

引用

页码：3202 / 3205

页数：4

共 23 条

[1] Dielectric description of wakes and stopping powers in solids
Abril, I
Garcia-Molina, R
Denton, CD
Perez-Perez, FJ
Arista, NR
[J]. PHYSICAL REVIEW A, 1998, 58 (01): : 357 - 366
[2] Brown carbon spheres in East Asian outflow and their optical properties
Alexander, Duncan T. L.
Crozier, Peter A.
Anderson, James R.
[J]. SCIENCE, 2008, 321 (5890) : 833 - 836
[3] X-RAY-SCATTERING FACTORS OF METALLIC ALUMINUM CALCULATED FROM A SELF-CONSISTENT X-RAY ATTENUATION DATA-BASE
BARKYOUMB, JH
SMITH, DY
[J]. PHYSICAL REVIEW A, 1990, 41 (09): : 4863 - 4867
[4] Finite difference method calculations of X-ray absorption fine structure for copper
Bourke, J. D.
Chantler, C. T.
Witte, C.
[J]. PHYSICS LETTERS A, 2007, 360 (06) : 702 - 706
[5] Measurements of Electron Inelastic Mean Free Paths in Materials
Bourke, J. D.
Chantler, C. T.
[J]. PHYSICAL REVIEW LETTERS, 2010, 104 (20)
[6] Brown MA, 2009, ANNU REP PROG CHEM C, V105, P174, DOI 10.1039/b803023p
[7] Electron inelastic mean free paths: influence of the modelling energy-loss function
de la Cruz, W.
Yubero, F.
[J]. SURFACE AND INTERFACE ANALYSIS, 2007, 39 (05) : 460 - 463
[8] Influence of the description of the target energy-loss function on the energy loss of swift projectiles
Denton, Cristian D.
Abril, Isabel
Garcia-Molina, Rafael
Moreno-Marin, Juan C.
Heredia-Avalos, Santiago
[J]. SURFACE AND INTERFACE ANALYSIS, 2008, 40 (11) : 1481 - 1487
[9] Theory of inelastic lifetimes of low-energy electrons in metals
Echenique, PM
Pitarke, JM
Chulkov, EV
Rubio, A
[J]. CHEMICAL PHYSICS, 2000, 251 (1-3) : 1 - 35
[10] Electron energy-loss spectroscopy in the TEM
Egerton, R. F.
[J]. REPORTS ON PROGRESS IN PHYSICS, 2009, 72 (01)

← 1 2 3 →