BEGIN:VCALENDAR PRODID:-//eluceo/ical//2.0/EN VERSION:2.0 CALSCALE:GREGORIAN BEGIN:VEVENT UID:4fd1e3def98f6674ad453590066efe82 DTSTAMP:20260307T143649Z SUMMARY:How sharp are atomically sharp interfaces in complex functional oxi de heterostructures? DESCRIPTION:Abstract: Complex functional oxide heterostructures have been s erving as a multi-directional platform for engineering novel interface fun ctionalities. Recent technical improvements of the epitaxial growth techni ques enable fabricating high-quality thin films and heterostructures. The phenomena occurring at their interfaces can be tailored depending on the c hoice of the constituents. However\, the key factor dominating the interfa ce functionalities is the control of interface sharpness. Perfect epitaxia l grown and structurally sharp interfaces may be rough with respect to its corresponding chemical composition. Therefore\, examining the interfacial structure and chemistry is vital for correlating with the physical proper ties. \nIn this lecture\, I present investigations on various complex func tional oxide heterostructures exhibiting different interface sharpness and \, correlatively\, different functionalities. Some exciting findings demon strate the following: i) The growth technique\, i.e. pulsed-laser depositi on versus atomic layer-by-layer oxide molecular beam epitaxy\, has a direc t impact on the structural and chemical sharpness of the interfaces\, ii) two-dimensional doping of La2CuO4-based multilayers results in different d opant distributions at both sides of the interfaces\, which induce differe nt superconducting mechanisms\, iii) the choice of the dopant directly aff ects the interface sharpness\, namely\, dopant re-distribution\, local oct ahedral distortions and thereby the interface functionalities. The effect of dopant distribution at interfaces on physical properties will be discus sed.\nBiography:\n \nProf. Dr. Peter A. van Aken leads the Stuttgart Cent er for Electron Microscopy (StEM)\, adding exceptional strength to the ana lytical capabilities of the Max Planck Institute for Solid State Research. StEM possesses outstanding expertise in scanning and transmission electro n microscopy (TEM)\, focused ion-beam applications\, and methodology devel opment. Prof. van Aken’s research focuses on the atomic-scale characteri zation of interfaces\, functional complex oxide hetero-structures\, strain ed semiconductors\, of optical properties of nanostructured thin films and plasmonic-active nanostructures\, nanoparticles and nanomaterials\, as we ll as of molecules on 2D materials. He uses and further develops the advan ced scanning TEM techniques\, electron energy-loss spectroscopy\, energy-d ispersive X-ray spectroscopy\, in-line electron holography\, in-situ TEM m ethods\, strain mapping\, quantitative high-resolution TEM analysis\, diff erent quantitative electron diffraction techniques\, image processing and simulation\, and 4D-STEM\, electron ptychography and tomography. Prof. van Aken’s research mission is the advancement of the in-depth microscopic understanding of materials with respect to their functionalities and struc ture–property relationships.\n \nIn September 2019\, the General Assemb ly of the Deutsche Gesellschaft für Elektronenmikroskopie (DGE) has elect ed Prof. Dr. Peter A. van Aken as Vice President for the period of 01.01.2 020 to 31.12.2021 and as President for the period of 01.01.2022 to 31.12.2 023. Prof. Dr. Peter A. van Aken is on the World’s Best List of the most cited scientists for the years 2018\, 2019 and 2020 (“Highly Cited Rese archers” from Clarivate Analytics). From January 2019 to June 2023\, Pro f. Dr. Peter A. van Aken is Coordinator and Principal Investigator of the European project ESTEEM3 (Enabling Science Through European Electron Micro scopy)\, which is an integrating activity for electron microscopy\, provid ing access to the leading European state-of-the-art electron microscopy re search infrastructures\, facilitating and extending transnational access s ervices of the most powerful atomic scale characterization techniques in a dvanced electron microscopy research to a wide range of academic and indus trial research communities for the analysis and engineering of novel mater ials in physical\, chemical and biological sciences.\n  URL:https://www.imperial.ac.uk/events/128871/how-sharp-are-atomically-sharp -interfaces-in-complex-functional-oxide-heterostructures/ DTSTART;TZID=Europe/London:20210120T140000 DTEND;TZID=Europe/London:20210120T150000 LOCATION:United Kingdom END:VEVENT BEGIN:VTIMEZONE TZID:Europe/London BEGIN:STANDARD DTSTART:20210120T140000 TZNAME:GMT TZOFFSETTO:+0000 TZOFFSETFROM:+0000 END:STANDARD END:VTIMEZONE END:VCALENDAR