Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session Q45: Buckley Prize, Isakson Prize, and Onsager Prize SessionInvited Live Streamed Prize/Award
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Sponsoring Units: DCMP GSNP Chair: Smitha Vishveshwara, University of Illinois at Urbana-Champaign Room: McCormick Place W-375D |
Wednesday, March 16, 2022 3:00PM - 3:36PM |
Q45.00001: Buckley Prize (2022): Spin-orbit coupling, spintronics, and topology Invited Speaker: Emmanuel I Rashba Spintronics is spin-based electronics facilitating electrical processing of information stored in electron spins. The underlying mechanism is spin-orbit coupling (SOC), a relativistic effect of the order of 1/c2. SOC also produces topological phases of matter. |
Wednesday, March 16, 2022 3:36PM - 3:41PM |
Q45.00002: Dedication to Gene Dresselhaus David K Campbell Tribute to Gene Dresselhaus (1929--2021), 2022 Recipient on the Oliver E. Buckley Prize |
Wednesday, March 16, 2022 3:41PM - 4:17PM |
Q45.00003: Isakson Prize (2022): Seeing is believing: nonliner optics on ferroic materials Invited Speaker: Manfred Fiebig For millennia, ferromagnetism was the only form of ferroic order known to humankind. Now, however, a large variety of magnetic, electrical and mechanical types of ferroic phenomena are being discussed. All of these all have one property in common: The ferroic ordering breaks the symmetry of the host material. Nonlinear, that is, frequency-converting coherent optical processes are very sensitive to these symmetry changes. Even the simplest nonlinear optical process, doubling of the frequency of the light, termed "second harmonic generation" (SHG), therefore couples to the ferroic order parameter and accesses important features of the ferroic state that are often inaccessible to non-optical techniques. Hidden ferroic structures like antiferromagnetic 180° domains can thus be imaged. Novel states like ferrotoroidicity as a spontaneous order of magnetic whirls can be probed. Ultrafast processes in the dynamics of the ferroic state can be resolved in terms of the question how fast a magnetic state can be switched. In particular, the coexistence of different types of ferroic order in a material can be imaged by SHG in the same experiment. SHG thus became an invaluable tool for resolving the magnetoelectric coupling of domains in multiferroics as materials uniting magnetic and ferroelectric order. In my talk I will give an overview of the most important milestones in the classification of (multi-)ferroic materials by nonlinear optics. On the one hand, I will discuss basic questions such as the search for yet unknown types of ferroic order and correlations. On the other hand, I will address highly application-relevant issues such as the use of SHG as a new in-situ characterization technique that tracks the emergence of ferroic order in thin films during the growth process. Presentation of a concept for "magnetoelectric teleportation" will be the not-too-serious conclusion of the lecture. |
Wednesday, March 16, 2022 4:17PM - 4:22PM |
Q45.00004: Dedication to Michael Fisher David K Campbell Tribute to Michael E Fisher (1931-2021), Inaugural recipient on the Lars Onsager Prize |
Wednesday, March 16, 2022 4:22PM - 4:58PM |
Q45.00005: Onsager Prize (2022): Many-body localization Invited Speaker: David A Huse Many-body localization (MBL) is a type of quantum coherence, while thermalization is decoherence. Thermalization has the upper hand, as decoherence always does, and as a result the MBL phase is in one sense very fragile. This means that most systems that exhibit many-body localization actually do thermalize in the thermodynamic limit of large systems and (extremely!) long times. However, many-body localization as a finite-size or finite-time effect is quite prevalent in model systems, as well as in various experiments. Recently (Morningstar, et al., arXiv:2107.05642), we have developed a method to make better estimates of the location of the MBL phase transition in certain one-dimensional models, finding that it occurs at much weaker interactions than the numerically-seen crossover from thermalization to the finite-size MBL regime. The physics behind this large difference can be understood in terms of many-body resonances and “avalanches”. |
Wednesday, March 16, 2022 4:58PM - 5:34PM |
Q45.00006: Onsager Prize (2022): TBD Invited Speaker: Boris Altshuler TBD |
Wednesday, March 16, 2022 5:34PM - 6:00PM Withdrawn |
Q45.00007: Onsager Prize (2022): TBD Invited Speaker: Igor L Aleiner TBD |
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