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DTSTART;TZID=Europe/Berlin:20260618T140000
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SUMMARY:RTG Seminar: Prasana Kumar Sahoo
DESCRIPTION:Engineering excitons in 2D lateral heterostructures for reconfigurable devices\n\n\n\nQuantum Materials & Device Research Lab (QMDrL)\, Materials Science Centre\,Indian Institute of Technology Kharagpur\, India \n\n\n\nTwo-dimensional semiconductor lateral heterostructures (LHS) provide atomically sharp 1D interfaces for controlling charge carriers\, excitons\, and light. I will present scalable growth of seamless TMD LHS\, exhibiting tunable PN junctions\, electroluminescence\, excitonic transistor operation\, and reversible photoconductivity. These materials offer a versatile platform for quantum photonics\, exciton-based devices\, and low-dimensional quantum systems. \n\n\n\nVenue: RUN 0.34
URL:https://run-regensburg.de/event/rtg-seminar-prasana-kumar-sahoo/
CATEGORIES:RTG Seminar
ATTACH;FMTTYPE=image/jpeg:https://run-regensburg.de/wp-content/uploads/2026/06/Sahoo.jpg
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DTSTART;TZID=Europe/Berlin:20260619T140000
DTEND;TZID=Europe/Berlin:20260619T150000
DTSTAMP:20260603T082149Z
CREATED:20260513T135656Z
LAST-MODIFIED:20260603T082149Z
UID:4137-1781877600-1781881200@run-regensburg.de
SUMMARY:RTG Colloquium: Alice Kunin
DESCRIPTION:High-performance time-resolved photoemission experiments of quantum materials\n\n\n\nPrinceton University \n\n\n\nI will discuss our work coupling MHz\, kW light sources with momentum microscopy to enable efficient time- and angle-resolved photoemission (tr-ARPES) studies. I will first examine the dynamics of intra- and interlayer excitons in twisted van der Waals heterobilayers. I will then discuss our current work on a new spectrometer to probe ultrafast surface photochemistry in situ with the extension of tr-ARPES beyond ultrahigh vacuum towards more realistic chemical environments. \n\n\n\nVenue: RUN Auditorium
URL:https://run-regensburg.de/event/rtg-colloquium-alice-kunin/
CATEGORIES:RTG Colloquium
ATTACH;FMTTYPE=image/png:https://run-regensburg.de/wp-content/uploads/2026/05/people_alice-768x768-1.png
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DTSTART;TZID=Europe/Berlin:20260703T140000
DTEND;TZID=Europe/Berlin:20260703T150000
DTSTAMP:20260622T154557Z
CREATED:20260513T140017Z
LAST-MODIFIED:20260622T154557Z
UID:4142-1783087200-1783090800@run-regensburg.de
SUMMARY:RTG Colloquium: Bruno Schuler
DESCRIPTION:Probing atomic defects in 2D semiconductors with light-coupled STM\n\n\n\nEmpa\, Switzerland \n\n\n\nTwo-dimensional (2D) semiconductors provide an exciting platform to engineer atomic quantum systems in a robust\, yet tunable solid-state system. This talk explores the intriguing physics of single point defects in transition metal dichalcogenide (TMD) monolayers\, investigated through atomically resolved scanning probe microscopy. \n\n\n\nWe demonstrate electrically induced exciton emission from both pristine MoS₂ and individual charged defects using scanning tunnelling microscope luminescence (STML) on ultrathin hBN decoupling layers [1]. Furthermore\, I will present our recent advances in time-resolved THz-STM using QEV maps to achieve state-selective ultrafast charge injection [2]. This approach enables the investigation of charge [3] and exciton dynamics [4] with atomic spatial\, millielectronvolt energy\, and picosecond temporal resolution. \n\n\n\nBy combining the structural and electronic properties accessible by conventional scanning probe microscopy with the optical fingerprint from STML and the excited-state dynamics revealed through pump-probe THz-STM\, we gain a comprehensive microscopic understanding of localized quantum states in low-dimensional materials. \n\n\n\n \n\n\n\n[1] L. Huberich et al. arxiv: 2510.15676 (2025)[2] L. Bobzien et al. APL Mater. 12\, 051110 (2024)[3] J. Allerbeck et al. Nat. Commun. 16\, 10806 (2025)[4] L. Bobzien et al. (in preparation) \n\n\n\nVenue: RUN Auditorium
URL:https://run-regensburg.de/event/rtg-colloquium-bruno-schuler/
CATEGORIES:RTG Colloquium
ATTACH;FMTTYPE=image/jpeg:https://run-regensburg.de/wp-content/uploads/2026/05/citations.jpg
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