BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Stewart Blusson Quantum Matter Institute - ECPv6.18.2//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Stewart Blusson Quantum Matter Institute
X-ORIGINAL-URL:https://qmi.miffanytark.com
X-WR-CALDESC:Events for Stewart Blusson Quantum Matter Institute
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/Vancouver
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20230312T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20231105T090000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20240310T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20241103T090000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20250309T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20251102T090000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/Vancouver:20240703T100000
DTEND;TZID=America/Vancouver:20240703T110000
DTSTAMP:20240625T155827Z
CREATED:20240625T155827Z
LAST-MODIFIED:20240625T155827Z
UID:7660-1720000800-1720004400@qmi.miffanytark.com
SUMMARY:Special Seminar: Solids with random stacking: the curious case of lithium
DESCRIPTION:Abstract: Close-packing of spheres is a problem with a long\, beautiful history that spans centuries. To achieve maximal density\, we must first arrange spheres into triangular layers and stack them. Each layer can sit in two possible positions. I will describe the solid that arises from random stacking\, i.e.\, when each twofold choice is made at random. I will introduce a related problem — that of stacking spheres with the least possible density\, while retaining stability. The conjectured solution involves stacking honeycomb layers\, with a six-fold choice at each layer.  I will describe random stacking in this case as well. \nI will then present a decades-long puzzle: the low-temperature structure of lithium and sodium. Both have irregular structures with many conflicting claims. We propose an explanation that borrows ideas from the field of frustrated magnetism. Lithium and sodium form close-packed structures\, with stacked triangular layers. Due to a hidden gauge symmetry\, all stacking configurations have the same electronic energy. We have a ‘frustrated’ solid where an infinite family of crystal structures compete. \nReferences: Phys. Rev. E 108\, 035003 (2023)\,arXiv:2405.15865 \nSpeaker Bio: Ganesh Ramachandran obtained his PhD from the University of Toronto in 2011. He then completed a postdoctoral stint at IFW\, Dresden. Subsequently\, he was a faculty member at the Institute of Mathematical Sciences in Chennai\, India. Since 2021\, he has been an Assistant Professor at Brock University. \nProf. Ramachandran has worked on frustrated magnetism\, topological phases\, quantum state preparation and statistical physics. His recent work touches upon pump-induced correlations\, altermagnetism\, spin ice and quantum dimer models.
URL:https://qmi.miffanytark.com/event/special-seminar-solids-with-random-stacking-the-curious-case-of-lithium/
ORGANIZER;CN="Aditi Adhikari":MAILTO:aditi.adhikari@ubc.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Vancouver:20240717T090000
DTEND;TZID=America/Vancouver:20240717T100000
DTSTAMP:20240716T230944Z
CREATED:20240716T230944Z
LAST-MODIFIED:20240716T230944Z
UID:7693-1721206800-1721210400@qmi.miffanytark.com
SUMMARY:Special Seminar: Wolf Widdra - Institute of Physics\, Martin-Luther-Universität Halle-Wittenberg: Laser-based double photoemission spectroscopy at surfaces
DESCRIPTION:Abstract: \nWith the recent progress in high-order harmonic generation (HHG) using femtosecond lasers\, laboratory photoelectron spectroscopy with an ultrafast\, widely tunable vacuum-ultraviolet light source has become available. Whereas HHG-based photoemission experiments at kilohertz repetition rates have been severely limited by the space-charge effects in the past\, the new development of compact HHG light sources with megahertz repetition rates allows for efficient photoemission and double photoemission experiments as is demonstrated here [1-7].\nI will present momentum-resolved photoemission experiments with photon energies between 14 and 40 eV that demonstrate the high performance of the setup [3\,4\,6]. In addition\, the combination of two time-of-flight spectrometers with coincidence detection electronics opens the way for efficient and long-term stable double photoemission experiments at variable photon energies [1\,6-8]. For the noble metal (001) surface of Ag\, we present a detailed analysis of double photoemission data and will compare them with similar data for the NiO(001) surface. The electron-electron pair distribution shows a sharp sum-energy onset\, which corresponds to one hole in the Ag 3d band (4.5 eV below the Fermi level) and a second excitation from the Ag sp band. Simultaneously\, an intense energy sharing between the electrons in the pair is visible indicating strong electron-electron correlations [5]. For thin films of C60\, a molecular-orbital resolved correlation energy is determined based on double photoemission data at various photon energies. \nReferences:\n[1]    M. Huth\, C.-T. Chiang\, A. Trützschler\, F. O. Schumann\, J. Kirschner\, and W. Widdra; Applied Physics Letters 104\, 061602 (2014).\n[2]    A. Blättermann\, C.-T. Chiang\, and W. Widdra; Physical Review A 89\, 043404 (2014).\n[3]    C.-T. Chiang\, M. Huth\, A. Trützschler\, M. Kiel\, F. O. Schumann\, J. Kirschner\, and W. Widdra\, New Journal of Physics 17\, 013035 (2015).\n[4]    C.-T. Chiang\, M. Huth\, A. Trützschler\, F. O. Schumann\, J. Kirschner\, and W. Widdra\, Electron Spectroscopy and Related Phenomena 200\, 15-21(2015).\n[5]     A. Trützschler\, M. Huth\, C.-T. Chiang\, R. Kamrla\, F. O. Schumann\, J. Kirschner\, and W. Widdra\, Phys. Rev. Lett. 118\, 136401(2017).\n[6]    M. Huth\, A. Trützschler\, C.-T. Chiang\, R. Kamrla\, F. O. Schumann\, and W. Widdra\, J. Appl. Phys. 124\, 164504 (2018).\n[7]     C.-T. Chiang\, A. Trützschler\, M. Huth\, R. Kamrla\, F. O. Schumann\, and W. Widdra\, Prog. Surf. Sci. 95\, 100572 (2020). \n  \nSpeaker Bio: Prof. Wolf Widdra is a Professor at the the Institute of Physics\, Martin-Luther-Universität Halle-Wittenberg\, Halle\, Germany. \n 
URL:https://qmi.miffanytark.com/event/special-seminar-wolf-widdra-institute-of-physics-martin-luther-universitat-halle-wittenberg-laser-based-double-photoemission-spectroscopy-at-surfaces/
CATEGORIES:Other seminars,UBC event
ORGANIZER;CN="Aditi Adhikari":MAILTO:aditi.adhikari@ubc.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Vancouver:20240731T100000
DTEND;TZID=America/Vancouver:20240731T110000
DTSTAMP:20240719T155257Z
CREATED:20240719T155257Z
LAST-MODIFIED:20240719T155257Z
UID:7696-1722420000-1722423600@qmi.miffanytark.com
SUMMARY:Special Seminar: David Abergel – Chief Editor of Nature Physics: Inside Nature Physics
DESCRIPTION:Abstract: What happens to your paper after you submit it to a journal is not always clear from the outside\, but it’s helpful for authors to understand the editorial process so that they can navigate it smoothly. In this talk\, we will unpack this process and explain how editors make their decisions. We will introduce Nature Physics (and other journals in the Nature Portfolio) and describe how we see our role in the scientific community and what we are trying to achieve. Building on that\, we will discuss how we select papers for peer review based on the likely breadth of interest in the results that they contain\, and how we interpret the information in peer review reports in terms of technical and editorial concerns. We’ll also discuss some techniques for writing papers and leave plenty of time for questions and discussion. \nBio: Before joining Nature Physics in 2017\, David carried out theoretical research on graphene and other two-dimensional materials\, and topological materials. He completed a Ph.D at Lancaster University in 2007\, and then did post-doctoral work at the University of Manitoba (Canada) and the University of Maryland (USA) before undertaking an Assistant Professorship at Nordita\, the Nordic Institute for Theoretical Physics in Stockholm\, Sweden. David is based in Nature Physics’ Berlin office.
URL:https://qmi.miffanytark.com/event/special-seminar-david-abergel-chief-editor-of-nature-physics-inside-nature-physics/
ORGANIZER;CN="Aditi Adhikari":MAILTO:aditi.adhikari@ubc.ca
END:VEVENT
END:VCALENDAR