Externally organized talk - Local and Global magnetism in 2D semiconductor nanostructures
Efrat Lifshitz
Technion - Israel Institute of Technology

Thu., May 25, 2023, 3 p.m.
This seminar is held online.
Online: https://tu-dresden.zoom.us/j/67788166110?pwd=cDZsbm01K1BZY1FwbW5nWnpKSHA3QT09

Google Scholar


Magnetism has been a topic of broad interest since the discoveries of motors/generators, through magneto-resistance, and up to modern times, where low dimensional materials offer support for new magnetic phenomena. The talk will focus on the influence of magnetic moments and magnetism on the magneto-optical properties in materials with reduced dimensions, exposing the influence of magnetic doping, intrinsic anisotropic effects and long-range magnetic order, with further details as below.
Magnetic self-doping in II-VI colloidal quantum dots: magnetic dopants endow the interaction between their unpaired spins and the photogenerated carriers, leading to a giant magnetization and excion’s g-factor. This interaction is identified by implementing the optical detected magnetic resonance method, deepening the understanding of surface properties.
Long-range magnetic order in metal phosphor tri-chalcogenide compounds: Metal phosphor tri-chalcogenides with the general chemical formula MPX3 (M=metal, X=chalcogenide) possess ferromagnetic or anti-ferromagnetic arrangement. Most recent magneto-optical measurements will be reported, exposing the dual relation between magnetism and electronic properties.
Intrinsic magnetism in perovskite materials: Perovskite materials are composed of organic-inorganic constituents, forming 2D and 3D structures. The discovery of unique magneto-optical properties in those materials reflects the development of intrinsic effective magnetic poles by the inversion of symmetry breaking (inducing a Rashba effect) or due to the existence of a nuclear field (the so-called Overhauser effect).
Overall, the observations designated a strong influence of magnetic effect on spin and optical properties of low-dimensional semiconductors, significantly impacting their implementation in modern spin-electronics and spin-optical devices.


Brief CV

Prof. Efrat Lifshitz, received her PhD at the University of Michigan, Ann Arbor, USA and a postdoctoral period at the same University as well as at the Weizmann Institute of Science, Rehovot, Israel. She joined the Technion in 1990. Prof. Lifshitz is holding the Matwei Gunsbuourgh Academic Chair at the Schulich Faculty of Chemistry, Technion. Most recent prizes and Awards: Taub, Excellence in Science Award, Technion, Israel Institute of Technology (2019); Lectureship speaker, Birkent University, Ankara, Turkey, (2018); Lectureship speaker, ETH, Switzerland, (2016); The 2016 Israel Vacuum Society Excellence Award for Research (2016); UK-Israel Lectureship Award, Oxford University (2015); Tenne Family Prize in memory of Lea Tenne for Nanoscale Sciences, awarded by the Israel Chemical Society (2015); External Senior Fellow at the Freiburg Institute of Advanced Studies (2015).
Prof. Lifshitz published ~ 220 scientific publications including journals with a high-ranking peer review (e.g., ACS Nano, Nano Letters, Adv. Mater., PRL, PRB), invited reviews (e.g., Science 2016, NaturePhotonics, 2020, Nanoscale 2016, Adv. Func. Matter. 2018), reviewed proceedings, and chapters in books. She has delivered approximately 130 invited talks at top-tier international scientific meetings mainly during the past decade (e.g., MRS, E-MRS, TNT, nanoGe, GRC, QD20xx, NaNaX) and her research was funded by numerous national agency resources, binational programs, and various FP7 and Horizon2020 projects. In addition, she is frequently serving in prestigious evaluation committees (ERC Synergy and ERC Advance Grants, Cost, Wolf Prize, Israel Prize, Rothschild Foundation, binational programs). Prof. Lifshitz has also been an active partner in the establishment of the Nanotechnology and Renewable Energy Centers at the Technion and has acted as chairman or co-chairman for numerous national and international scientific meetings.



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Externally organized talk - Local and Global magnetism in 2D semiconductor nanostructures
Efrat Lifshitz
Technion - Israel Institute of Technology

Thu., May 25, 2023, 3 p.m.
This seminar is held online.
Online: https://tu-dresden.zoom.us/j/67788166110?pwd=cDZsbm01K1BZY1FwbW5nWnpKSHA3QT09

Google Scholar


Magnetism has been a topic of broad interest since the discoveries of motors/generators, through magneto-resistance, and up to modern times, where low dimensional materials offer support for new magnetic phenomena. The talk will focus on the influence of magnetic moments and magnetism on the magneto-optical properties in materials with reduced dimensions, exposing the influence of magnetic doping, intrinsic anisotropic effects and long-range magnetic order, with further details as below.
Magnetic self-doping in II-VI colloidal quantum dots: magnetic dopants endow the interaction between their unpaired spins and the photogenerated carriers, leading to a giant magnetization and excion’s g-factor. This interaction is identified by implementing the optical detected magnetic resonance method, deepening the understanding of surface properties.
Long-range magnetic order in metal phosphor tri-chalcogenide compounds: Metal phosphor tri-chalcogenides with the general chemical formula MPX3 (M=metal, X=chalcogenide) possess ferromagnetic or anti-ferromagnetic arrangement. Most recent magneto-optical measurements will be reported, exposing the dual relation between magnetism and electronic properties.
Intrinsic magnetism in perovskite materials: Perovskite materials are composed of organic-inorganic constituents, forming 2D and 3D structures. The discovery of unique magneto-optical properties in those materials reflects the development of intrinsic effective magnetic poles by the inversion of symmetry breaking (inducing a Rashba effect) or due to the existence of a nuclear field (the so-called Overhauser effect).
Overall, the observations designated a strong influence of magnetic effect on spin and optical properties of low-dimensional semiconductors, significantly impacting their implementation in modern spin-electronics and spin-optical devices.


Brief CV

Prof. Efrat Lifshitz, received her PhD at the University of Michigan, Ann Arbor, USA and a postdoctoral period at the same University as well as at the Weizmann Institute of Science, Rehovot, Israel. She joined the Technion in 1990. Prof. Lifshitz is holding the Matwei Gunsbuourgh Academic Chair at the Schulich Faculty of Chemistry, Technion. Most recent prizes and Awards: Taub, Excellence in Science Award, Technion, Israel Institute of Technology (2019); Lectureship speaker, Birkent University, Ankara, Turkey, (2018); Lectureship speaker, ETH, Switzerland, (2016); The 2016 Israel Vacuum Society Excellence Award for Research (2016); UK-Israel Lectureship Award, Oxford University (2015); Tenne Family Prize in memory of Lea Tenne for Nanoscale Sciences, awarded by the Israel Chemical Society (2015); External Senior Fellow at the Freiburg Institute of Advanced Studies (2015).
Prof. Lifshitz published ~ 220 scientific publications including journals with a high-ranking peer review (e.g., ACS Nano, Nano Letters, Adv. Mater., PRL, PRB), invited reviews (e.g., Science 2016, NaturePhotonics, 2020, Nanoscale 2016, Adv. Func. Matter. 2018), reviewed proceedings, and chapters in books. She has delivered approximately 130 invited talks at top-tier international scientific meetings mainly during the past decade (e.g., MRS, E-MRS, TNT, nanoGe, GRC, QD20xx, NaNaX) and her research was funded by numerous national agency resources, binational programs, and various FP7 and Horizon2020 projects. In addition, she is frequently serving in prestigious evaluation committees (ERC Synergy and ERC Advance Grants, Cost, Wolf Prize, Israel Prize, Rothschild Foundation, binational programs). Prof. Lifshitz has also been an active partner in the establishment of the Nanotechnology and Renewable Energy Centers at the Technion and has acted as chairman or co-chairman for numerous national and international scientific meetings.



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