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Photonics Seminar: Julian Patrick Klein, Massachusetts Institute of Technology

Please join us October 18th, for a one-hour talk from Julian Patrick Klein, Massachusetts Institute of Technology, titled:

Towards atomic level engineered interaction of quantum matter in layered materials

Abstract – The discovery of quantum materials and the rapid development of instruments equipped to tailor them at the atomic scale are both key enablers for quantum matter engineering with applications in quantum simulation, quantum photonics and spintronics.

In this seminar we will show that the layered magnetic semiconductor CrSBr fulfills several key requirements for controllably engineeredquantum matter. First, we will show that CrSBr is electronically a quasi-1D material manifesting in its quasiparticles and their mutual interactions. [1] Second, we will show that CrSBr hosts optically active defects that are correlated with the magnetic phase diagram and with a defect-induced magnetic order. [2] Third, we will demonstrate that CrSBr is highly amenable to atomic manipulation in a scanning transmission electron microscope undergoing an electron beam induced phase transformation. [3] Lastly, we will show deep learning augmented defect detection in CrSBr [4] and give a brief outlook on the prospects for periodic atomic level engineered quantum matter in this material.

Overall, CrSBr offers optically active localized defects correlated with the magnetic phase diagram while being amenable to atomic level manipulation providing new means to access microscopic many-body phenomena using optical spectroscopy.

[1] Klein, J. et al., The bulk van der Waals layered magnet CrSBr is a quasi-1D quantum material
arXiv:2205.13456 under review (2022)
[2] Klein, J. et al., Sensing the local magnetic environment through optically active defects in a layered
magnetic semiconductor arXiv:2207.02884 under review (2022)
[3] Klein, J. et al., Control of structure and spin texture in the van der Waals layered magnet CrSBr
arXiv:2107.00037 in print Nat. Comms. (2022)
[4] Weile, M. and Klein, J. et al., Deep learning facilitated analysis of defects and alloying in a two-dimensional magnet in preparation (2022)

Bio – Julian Klein is a postdoctoral fellow at MIT in the Department of Materials Science and Engineering in the group of Prof. Frances Ross. He received his doctorate in experimental physics at the Technical University of Munich (TUM) in 2019 where he investigated new means to create large scale quantum photonic systems in two-dimensional materials. As part of his doctorate, he conducted a 3-month research stay at the IBM Thomas J. Watson Research Center in Yorktown Heights. In 2020, he was awarded a Feodor-Lynen postdoctoral fellowship from the Alexander von Humboldt foundation. His current research interests include atomic level quantum matter engineering in novel low-dimensional materials as platforms for highly scalable quantum technologies.

This one-hour seminar will be presented in the ASRC Auditorium and broadcast via Zoom, with time for Q and A to follow.

Zoom Meeting ID: 872 1216 6637
Passcode: 595090

For more information about this hybrid event, please contact:

Leah Abraha


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Event Information

October 18, 2022
1:00 pm - 2:00 pm
Advanced Science Research Center (ASRC)
85 St. Nicholas Terrace
New York, NY 10031 United States
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(212) 413-3300
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