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Thursday, 10 April 2025 |
Video-Recording for any system with MP4-support - Video.mp4 (ca. 414 Mb) |
15:15 – 16:25 |
"Strongly
correlated electrons in semiconductor moire materials"
Speaker: Prof. Atac
Imamoglu
(ETH)
Abstract:
Moire
superlattices in two dimensional semiconductors have
enabled the
observation
of a wealth of physical phenomena driven by strong electronic
correlations,
ranging from Mott-Wigner states to fractional Chern
insulators.
After reviewing electronic and optical
properties in this new playground for
condensed
matter physics, I will describe two experiments. First,
I will show magnetic correlations in the
vicinity of a Mott-insulator state
of electrons. By observing
electronic magnetization through the strength
of the polarization-selective
attractive polaron resonances, we find that
when the Mott state is doublon doped, the system exhibits ferromagnetic
correlations
in agreement with the Nagaoka model. Second, I will
show
very recent experiments
demonstrating optical orientation of Chern
insulator
states.
About the Speaker:
Atac İmamoğlu
graduated from TED Ankara College in 1981.
He received his BSc
in electrical engineering at the Middle East Technical
University, and his Ph.D. from Stanford
for his work on Electromagnetically
Induced Transparency and Lasers without
Inversion. He did post-doctoral
work on atomic and molecular
physics at Harvard.In 1993, he joined the
Electrical and Computer Engineering
Department of University of California,
Santa Barbara. In 1999, he became a
professor of electrical engineering
and physics. In 2001 he moved
to the University of Stuttgart in Germany.
Since 2002, he has been working at ETHZ
(Swiss Federal Institute of Technology),
Switzerland,
where
he is heading the research group on Quantum Photonics
He received the Charles Townes Award of
the Optical Society of America
in 2010, Quantum Electronics
Award of IEEE in 2009,
the Muhammed
Dahleh Award of UCSB in 2006, the Wolfgang Paul Award
of the Humboldt Foundation in
2002, the TÜBİTAK prize for physics in 2001,
David and Lucile Packard Fellowship in
1996, and National Science
Foundation Career Award in 1995.He is a
member of the Scientific Advisory Committee at the IMDEA Nanoscience
Institute. He is a fellow of the
American Physical Society, of the Optical
Society of America and the
Turkish National Academy of Sciences.