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X-WR-CALNAME:UNAM Nanoteknoloji Araştırma Merkezi
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DTSTART:20210101T000000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20211119T160000
DTEND;TZID=Europe/Moscow:20211119T170000
DTSTAMP:20260908T021713
CREATED:20211115T112644Z
LAST-MODIFIED:20211115T122531Z
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SUMMARY:Exploring electronic correlations in low dimensional materials
DESCRIPTION:T. SERKAN KASIRGA\nMSN Graduate Program and UNAM \n\nStrong electronic correlations among various degrees of freedoms in solids result in the emergence of fascinating phenomena. To name a few we can list metal-insulator transitions\, charge density wave transitions and superconductivity. However\, these phenomena are notoriously difficult to study experimentally as they are typically associated with phase transitions that are extremely sensitive to the defects and impurities in the materials. In this talk\, I will present our efforts to understand the phase transitions in some exemplary materials and present a journey from materials synthesis to characterization of the properties via electrical\, mechanical and optical methods. First\, I will talk about how we synthesize the materials in a unique setup that allows real-time optical observation of the crystal synthesis. Then\, I will talk about the effect of thickness on the phase transitions and how we use light to measure certain properties of the correlated materials. Overall\, I will try to give a general perspective on our efforts and conclude with open questions. \n \nAbout The Speaker\nDr. Kasırga got his bachelor’s degree from Bilkent University in physics in 2009. Then\, he moved to the University of Washington\, Seattle for his Ph.D. in physics. After completing his Ph.D. in 2013\, he moved to Bilkent University as a principal investigator at the National Nanotechnology Research Center (UNAM) and established a research program. Since 2015\, he has been serving as the associate director of UNAM and since 2016 he is co-affiliated with the department of physics. His research has appeared in prestigious journals in his field such as Nature\, Nature Nanotechnology\, Nano Letters and 2D Materials. For these research efforts\, the Academy of Science awarded him the Young Scientist Award (GEBİP) in 2021. \n\nJoin Zoom Meeting\nhttps://zoom.us/j/95581724217 \n\n 
URL:https://unam.bilkent.edu.tr/en/event/exploring-electronic-correlations-in-low-dimensional-materials/
CATEGORIES:UNAM PI Seminars
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20211112T160000
DTEND;TZID=Europe/Moscow:20211112T170000
DTSTAMP:20260908T021713
CREATED:20211115T122209Z
LAST-MODIFIED:20211115T132854Z
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SUMMARY:How does self-organization reduce entropy?
DESCRIPTION:ÖMER İLDAY\nMSN Graduate Program and UNAM \n\nSelf-organization is the spontaneous emergence of an ordered state. Despite its ubiquity\, how self-organization reduces entropy was never clarified. In this talk\, we present a new theoretical framework\, whereby we decompose a self-organized system into two parts\, one that gets ordered and another that reduces the entropy of the former by mutual information generated through a feedback process. We show that the combined system simply evolves to higher total entropy\, which inadvertently reduces the entropy of the organized part. \nSelf-organization is notoriously difficult to direct to a specific pattern. Our new framework suggests a route. We need to ensure that the desired pattern has higher feedback gain than the competing ones. We also introduce stimulated symmetry breaking as means to reshape the feedback gain landscape. As a proof of concept\, we experimentally demonstrate directing a self-organization process\, namely\, nonlinear laser lithography\, to create all 2D Bravais lattices. \n \n  \nAbout The Speaker\nDr. F. Ömer Ilday studied theoretical physics at Boğaziçi University\, Istanbul\, Turkey\, graduating valedictorian in 1998. He took his Ph.D. in applied physics from Cornell University\, USA\, in 2003. He worked at MIT from 2003 to 2006. In 2006\, he joined Bilkent University as a faculty member. He was awarded the European Research Council’s prestigious Consolidator Grant in 2013\, the first ERC grant on basic science in Turkey\, and the ERC Proof of Concept Grant in 2021. He has published ten articles in Nature\, Nature Photonics\, Nature Physics\, and Nature Communications. His contributions to science have been generously recognized through the Findlay Award\, TÜBA-GEBIP Award\, Teşvik Award (TÜBİTAK)\, Engin Arık Science Award from the Turkish Physical Society\, and the top award in science in Turkey\, the Science Award of TÜBİTAK. He has been elected as a member of the Science Academy of Turkey and Academia Europaea. \n\nJoin Zoom Meeting\nhttps://zoom.us/j/95581724217
URL:https://unam.bilkent.edu.tr/en/event/how-does-self-organization-reduce-entropy/
CATEGORIES:UNAM PI Seminars
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20211105T160000
DTEND;TZID=Europe/Moscow:20211105T170000
DTSTAMP:20260908T021713
CREATED:20211115T132640Z
LAST-MODIFIED:20211115T134414Z
UID:6096-1636128000-1636131600@unam.bilkent.edu.tr
SUMMARY:The birth\, life\, and death of dissipative colloidal crystals
DESCRIPTION:SERİM İLDAY\nMSN Graduate Program and UNAM \n\nIn 1994 Erwin Schrödinger published an inspiring book titled “What Is Life? The Physical Aspect of the Living Cell.” Using only physical and mathematical reasoning\, he concluded that the information necessary to replicate the living is most likely stored in an aperiodic crystal before the discovery of DNA. This provoked -at the time- the radical idea that\, despite its complexity\, life can be described by mathematical rules governing physical processes. Since then\, the idea has been explored theoretically with simple models such as cellular automata\, originally introduced by von Neumann\, or with highly complex biochemical experiments. There is a lack of the experimental counterpart of the simple theoretical models. \nSeveral years ago\, we designed the simplest experimental system that can still manifest the key characteristics of living organisms. Our system does not involve any biochemical interactions but only purely physical effects. We showed that artificial atoms (strongly Brownian polystyrene spheres sustained in water) can form autocatalytic\, dynamic adaptive crystals with a garden variety of patterns (Nature Commun. 2017). We further formulated the physical processes of their emergence and uncovered universality (Nature Phys. 2020). Understanding the rules behind their “birth” and “life” motivated us to study their “death\,” which led to the discovery that one-time-only energy delivery may be enough to form connections between initially uncorrelated and spatially distant atoms (JPCM 2021). In this talk\, I will walk you through this journey and explore the possibility of approaching life from first principles. \n \nAbout The Speaker\nSerim’s research is at the intersection of soft condensed matter\, active matter\, self-assembly\, complexity\, nonequilibrium statistical physics\, and nonlinear dynamics. She is an Assistant Professor at the Institute of Materials Science and Nanotechnology & National Nanotechnology Research Center (UNAM) at Bilkent University\, Ankara\, Turkey\, which she joined in December 2017. Before that\, she was a postdoctoral researcher and later a research scientist at the Physics Department at Bilkent University. She received her Ph.D. from Middle East Technical University\, Ankara\, Turkey\, in 2014. She is the recipient of prestigious awards and recognitions\, including the L’Oreal-UNESCO For Women in Science (FWIS) in 2018 and European Research Council Starting Grant (ERC-StG) in 2019. She has been a Fellow of the Young Academy of Europe (YAE) since 2020 and was elected as an ‘Emerging Leader’ in condensed matter physics by the Editorial Board of the Journal of Physics: Condensed Matter the same year. Her research has been published in renowned journals\, including Nature Physics\, Nature Photonics\, Nature Communications\, and Nano Letters. \n\nJoin Zoom Meeting\nhttps://zoom.us/j/95581724217 \n\n 
URL:https://unam.bilkent.edu.tr/en/event/the-birth-life-and-death-of-dissipative-colloidal-crystals/
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