BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
CALSCALE:GREGORIAN
PRODID:-//WordPress - MECv7.32.0//EN
X-ORIGINAL-URL:https://csmb.hu-berlin.de/
X-WR-CALNAME:CSMB
X-WR-CALDESC:Center for the Science of Materials Berlin
X-WR-TIMEZONE:Europe/Berlin
BEGIN:VTIMEZONE
TZID:Europe/Berlin
X-LIC-LOCATION:Europe/Berlin
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20260329T030000
RRULE:FREQ=YEARLY;BYMONTH=03;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20261025T020000
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=4SU
END:STANDARD
END:VTIMEZONE
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-PUBLISHED-TTL:PT1H
X-MS-OLK-FORCEINSPECTOROPEN:TRUE
BEGIN:VEVENT
CLASS:PUBLIC
UID:MEC-8511df98c02ab60aea1b2356c013bc0f@csmb.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20251009T153000
DTEND;TZID=Europe/Berlin:20251009T170000
DTSTAMP:20250929T111545Z
CREATED:20250929
LAST-MODIFIED:20250929
PRIORITY:5
SEQUENCE:7
TRANSP:OPAQUE
SUMMARY:Extraction of the self-energy and Eliashberg spectral function from angle-resolved photoemission spectroscopy – Tom van Waas
DESCRIPTION:Join us at the next Colloquium@T2P on\nExtraction of the self-energy and Eliashberg spectral function from angle-resolved photoemission spectroscopy\nThomas P. van Waas\nUniversite catholique de Louvain, Belgium\n\nThe talk will also be broadcast on Zoom:\nhttps://hu-berlin.zoom-x.de/j/65312382601?pwd=UzGKC7rqv7ZoLkQMlDr4QhCKDJfopx.1 ( https://hu-berlin.zoom-x.de/j/65312382601?pwd=UzGKC7rqv7ZoLkQMlDr4QhCKDJfopx.1 )\n \nAbstract:\nAngle-resolved photoemission spectroscopy (ARPES) is an experimental technique that provides access to the electron spectral function, defined in terms of the non-interacting dispersion and the electron self-energy. According to Matthiessen’s rule, the electron self-energy is the sum of interactions with impurities, other electrons, and phonons. From the latter contribution, the maximum-entropy method can be used to extract the Eliashberg electron-phonon coupling spectral function, which is a measure of the coupling strength of the phonon spectrum. We have embedded the maximum-entropy method in a Bayesian inference loop to fully quantify the spectral function, to be released in our novel Python package xARPES. In this talk, I showcase the features of xARPES with the 2-dimensional electron liquid on the surface of SrTiO3 and with Li-doped graphene. In addition, I introduce a direct 2D fitting approach that offers improved numerical scaling and counteracts energy resolution issues, as demonstrated with MoTe2.\n \n
URL:https://csmb.hu-berlin.de/events/van-waas/
LOCATION:Zum Großen Windkanal 2, 12489 Berlin
ATTACH;FMTTYPE=image/jpeg:https://csmb.hu-berlin.de/wp-content/uploads/2025/09/2025-10-09-Colloquium@T2P-vanWaas.jpg
END:VEVENT
END:VCALENDAR