Spin-filtered time-of-flight k-space microscopy of Ir--Towards the “complete” photoemission experiment

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F17%3A43950492" target="_blank" >RIV/49777513:23640/17:43950492 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.ultramic.2017.06.025" target="_blank" >http://dx.doi.org/10.1016/j.ultramic.2017.06.025</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ultramic.2017.06.025" target="_blank" >10.1016/j.ultramic.2017.06.025</a>

Result language

angličtina

Original language name

Spin-filtered time-of-flight k-space microscopy of Ir--Towards the “complete” photoemission experiment

Original language description

The combination of momentum microscopy (high resolution imaging of the Fourier plane) with an imaging spin filter has recently set a benchmark in k-resolution and spin-detection efficiency. Here we show that the degree of parallelization can be further increased by time-of-flight energy recording. On the quest towards maximum information (in earlier work termed “complete” photoemission experiment) we have studied the prototypical high-Z fcc metal iridium. Large partial bandgaps and strong spin-orbit interaction lead to a sequence of spin-polarized surface resonances. Soft X-rays give access to the 4D spectral density function ρ (EB,kx,ky,kz ) weighted by the photoemission cross section. The Fermi surface and all other energy isosurfaces, Fermi velocity distribution vF (kF), electron or hole conductivity, effective mass and inner potential can be obtained from the multi-dimensional array ρ by simple algorithms. Polarized light reveals the linear and circular dichroism texture in a simple manner and an imaging spin filter exposes the spin texture. One-step photoemission calculations are in fair agreement with experiment. Comparison of the Bloch spectral function with photoemission calculations uncovers that the observed high spin polarization of photoelectrons from bulk bands originates from the photoemission step and is not present in the initial state.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project

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Continuities

O - Projekt operacniho programu

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ULTRAMICROSCOPY

ISSN

0304-3991

e-ISSN

—

Volume of the periodical

183

Issue of the periodical within the volume

DEC 2017

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

19-29

UT code for WoS article

000415578200005

EID of the result in the Scopus database

2-s2.0-85022012160