Journal Article

FZJ-2019-01942

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Momentum microscopy on the micrometer scale: photoemission micro-tomography applied to single molecular domains

Felter, J.FZJ* ; Wolters, J. ; Bocquet, F. C. ; Tautz, F. S.FZJ* ; Kumpf, C. (Corresponding author)FZJ*

2019
IOP Publ.80390 Bristol

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Please use a persistent id in citations: doi:10.1088/1361-648X/aafc45

Abstract: Photoemission tomography (PT) is a newly developed method for analyzing angularresolved photoemission data. In combination with momentum microscopy it allows fora comprehensive investigation of the electronic structure of (in particular) metal-organicinterfaces as they occur in organic electronic devices. The most interesting aspect in thiscontext is the band alignment, the control of which is indispensable for designing devices.Since PT is based on characteristic photoemission patterns that are used as fingerprints,the method works well as long as these patterns are uniquely representing the specificmolecular orbital they are originating from. But this limiting factor is often not fulfilledfor systems exhibiting many differently oriented molecules, as they may occur on highlysymmetric substrate surfaces. Here we show that this limitation can be lifted by recording thephotoemission data in a momentum microscope and limiting the probed surface area to onlya few micrometers squared, since this corresponds to a typical domain size for many systems.We demonstrate this by recording data from a single domain of the archetypal adsorbatesystem 1,4,5,8-naphthalenetetracarboxylic dianhydride on Cu(0 0 1). This proof of principleexperiment paves the way for establishing the photoemission μ-tomography method as anideal tool for investigating the electronic structure of metal-organic interfaces with so farunraveled clarity and unambiguity.

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Contributing Institute(s):

1. Funktionale Nanostrukturen an Oberflächen (PGI-3)

Research Program(s):

1. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)
2. DFG project 396769409 - Grundlagen der Photoemissionstomographie (396769409)

Appears in the scientific report 2019

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; National-Konsortium ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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