Autonomous micro-focus angle-resolved photoemission spectroscopy

Steinn Ýmir Ágústsson; Alfred J.H. Jones; Davide Curcio; Søren Ulstrup; Jill Miwa; Davide Mottin; Panagiotis Karras; Philip Hofmann

doi:10.1063/5.0204663

Autonomous micro-focus angle-resolved photoemission spectroscopy

Steinn Ýmir Ágústsson, Alfred J.H. Jones, Davide Curcio, Søren Ulstrup, Jill Miwa, Davide Mottin, Panagiotis Karras, Philip Hofmann^*

^*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

1 Citationer (Scopus)

Abstract

Angle-resolved photoemission spectroscopy (ARPES) is a technique used to map the occupied electronic structure of solids. Recent progress in x-ray focusing optics has led to the development of ARPES into a microscopic tool, permitting the electronic structure to be spatially mapped across the surface of a sample. This comes at the expense of a time-consuming scanning process to cover not only a three-dimensional energy-momentum (E, k_x, k_y) space but also the two-dimensional surface area. Here, we implement a protocol to autonomously search both k- and real-space in order to find positions of particular interest, either because of their high photoemission intensity or because of sharp spectral features. The search is based on the use of Gaussian process regression and can easily be expanded to include additional parameters or optimization criteria. This autonomous experimental control is implemented on the SGM4 micro-focus beamline of the synchrotron radiation source ASTRID2.

Originalsprog	Engelsk
Artikelnummer	055106
Tidsskrift	Review of Scientific Instruments
Vol/bind	95
Nummer	5
ISSN	0034-6748
DOI	https://doi.org/10.1063/5.0204663
Status	Udgivet - maj 2024

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10.1063/5.0204663

Citationsformater

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title = "Autonomous micro-focus angle-resolved photoemission spectroscopy",

abstract = "Angle-resolved photoemission spectroscopy (ARPES) is a technique used to map the occupied electronic structure of solids. Recent progress in x-ray focusing optics has led to the development of ARPES into a microscopic tool, permitting the electronic structure to be spatially mapped across the surface of a sample. This comes at the expense of a time-consuming scanning process to cover not only a three-dimensional energy-momentum (E, kx, ky) space but also the two-dimensional surface area. Here, we implement a protocol to autonomously search both k- and real-space in order to find positions of particular interest, either because of their high photoemission intensity or because of sharp spectral features. The search is based on the use of Gaussian process regression and can easily be expanded to include additional parameters or optimization criteria. This autonomous experimental control is implemented on the SGM4 micro-focus beamline of the synchrotron radiation source ASTRID2.",

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AU - Ágústsson, Steinn Ýmir

AU - Jones, Alfred J.H.

AU - Curcio, Davide

AU - Ulstrup, Søren

AU - Miwa, Jill

AU - Mottin, Davide

AU - Karras, Panagiotis

AU - Hofmann, Philip

PY - 2024/5

Y1 - 2024/5

N2 - Angle-resolved photoemission spectroscopy (ARPES) is a technique used to map the occupied electronic structure of solids. Recent progress in x-ray focusing optics has led to the development of ARPES into a microscopic tool, permitting the electronic structure to be spatially mapped across the surface of a sample. This comes at the expense of a time-consuming scanning process to cover not only a three-dimensional energy-momentum (E, kx, ky) space but also the two-dimensional surface area. Here, we implement a protocol to autonomously search both k- and real-space in order to find positions of particular interest, either because of their high photoemission intensity or because of sharp spectral features. The search is based on the use of Gaussian process regression and can easily be expanded to include additional parameters or optimization criteria. This autonomous experimental control is implemented on the SGM4 micro-focus beamline of the synchrotron radiation source ASTRID2.

AB - Angle-resolved photoemission spectroscopy (ARPES) is a technique used to map the occupied electronic structure of solids. Recent progress in x-ray focusing optics has led to the development of ARPES into a microscopic tool, permitting the electronic structure to be spatially mapped across the surface of a sample. This comes at the expense of a time-consuming scanning process to cover not only a three-dimensional energy-momentum (E, kx, ky) space but also the two-dimensional surface area. Here, we implement a protocol to autonomously search both k- and real-space in order to find positions of particular interest, either because of their high photoemission intensity or because of sharp spectral features. The search is based on the use of Gaussian process regression and can easily be expanded to include additional parameters or optimization criteria. This autonomous experimental control is implemented on the SGM4 micro-focus beamline of the synchrotron radiation source ASTRID2.

U2 - 10.1063/5.0204663

DO - 10.1063/5.0204663

M3 - Journal article

C2 - 38717271

AN - SCOPUS:85192607038

SN - 0034-6748

VL - 95

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 5

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ER -

Autonomous micro-focus angle-resolved photoemission spectroscopy

Abstract

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