Topological analysis of paraxially scattered electron vortex beams

被引：24

作者：

Lubk, Axel ^{[1
,2
]}

Clark, Laura ^{[2
]}

Guzzinati, Giulio ^{[2
]}

Verbeeck, Jo ^{[2
]}

机构：

[1] Tech Univ Dresden, Inst Struct Phys, Triebenberg Lab, D-01062 Dresden, Germany

[2] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium

来源：

PHYSICAL REVIEW A | 2013年 / 87卷 / 03期

基金：

欧洲研究理事会;

关键词：

PROPAGATION; VORTICES;

D O I：

10.1103/PhysRevA.87.033834

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate topological aspects of subnanometer electron vortex beams upon elastic propagation through atomic scattering potentials. Two main aspects can be distinguished: (i) significantly reduced delocalization compared to a similar nonvortex beam if the beam centers on an atomic column and (ii) site symmetry dependent splitting of higher-order vortex beams. Furthermore, the results provide insight into the complex vortex line fabric within the elastically scattered wave containing characteristic vortex loops predominantly attached to atomic columns and characteristic twists of vortex lines around atomic columns. DOI: 10.1103/PhysRevA.87.033834

引用

页数：8

共 28 条

[1]

Abramowitz M., 1964, HDB MATH FUNCTIONS F

[2]

Acheson D. J., 1990, ELEMENTARY FLUID DYN, DOI [10.1121/1.400751, DOI 10.1121/1.400751]

[3] Phase retrieval and aberration correction in the presence of vortices in high-resolution transmission electron microscopy [J].

Allen, LJ ;

Faulkner, HML ;

Oxley, M ;

Paganin, D .

ULTRAMICROSCOPY, 2001, 88 (02) :85-97

[4]

[Anonymous], 2003, INTRO CONVENTIONAL T

[5] Topological events on wave dislocation lines: birth and death of loops, and reconnection [J].

Berry, M. V. ;

Dennis, M. R. .

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, 2007, 40 (01) :65-74

[6] Optical currents [J].

Berry, M. V. .

JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS, 2009, 11 (09)

[7] Electron Vortex Beams in a Magnetic Field: A New Twist on Landau Levels and Aharonov-Bohm States [J].

Bliokh, Konstantin Y. ;

Schattschneider, Peter ;

Verbeeck, Jo ;

Nori, Franco .

PHYSICAL REVIEW X, 2012, 2 (04)

[8] Semiclassical dynamics of electron wave packet states with phase vortices [J].

Bliokh, Konstantin Yu. ;

Bliokh, Yury P. ;

Savel'ev, Sergey ;

Nori, Franco .

PHYSICAL REVIEW LETTERS, 2007, 99 (19)

[9] THE SCATTERING OF ELECTRONS BY ATOMS AND CRYSTALS .1. A NEW THEORETICAL APPROACH [J].

COWLEY, JM ;

MOODIE, AF .

ACTA CRYSTALLOGRAPHICA, 1957, 10 (10) :609-619

[10]

Egerton R.F., 1996, ELECT ENERGY LOSS SP

← 1 2 3 →