[phas-undergrad] [phas-dept] 10/6 YouTube presentation for colloquium this week
Heungman Park
Heungman.Park at tamuc.edu
Mon Oct 3 19:53:49 CDT 2022
Dear all in Physics and Astronomy,
We will have a YouTube presentation this week for colloquium.
We do not meet on Thursday.
PHYS- 401/501 students must complete an assignment on D2L.
“Magic angle graphene: The twist and shout of quantum materials”
https://youtu.be/xgy4sGi_cmY
MIT.nano Seminar Series: Prof. Pablo Jarillo-Herrero
Pablo Jarillo-Herrero, the Cecil and Ida Green Professor of Physics at MIT
The understanding of strongly-correlated quantum matter has challenged physicists for decades. Such difficulties have stimulated new research paradigms, such as ultra-cold atom lattices for simulating quantum materials. In this talk, Jarillo-Herrero presents a new platform to investigate strongly correlated physics, based on graphene moiré superlattices.
In particular, Jarillo-Herrero shows that when two graphene sheets are twisted by an angle close to the theoretically predicted ‘magic angle,’ the resulting flat band structure near the Dirac point gives rise to a strongly-correlated electronic system. These flat bands exhibit half-filling insulating phases at zero magnetic field, which we show to be a correlated insulator arising from electrons localized in the moiré superlattice.
Moreover, upon doping, we find electrically tunable superconductivity in this system, with many characteristics similar to high-temperature cuprates superconductivity. These unique properties of magic-angle twisted bilayer graphene open up a new playground for exotic many-body quantum phases in a 2D platform made of pure carbon and without magnetic field. The easy accessibility of the flat bands, the electrical tunability, and the bandwidth tunability though twist angle may pave the way toward more exotic correlated systems, such as quantum spin liquids or correlated topological insulators.
The MIT.nano Seminar Series takes place monthly during the academic year. It is organized by Farnaz Niroui, Assistant Professor of Electrical Engineering & Computer Science (EECS) at MIT.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.tamuc.edu/pipermail/phas-undergrad/attachments/20221004/a2192786/attachment.html>
-------------- next part --------------
_______________________________________________
phas-dept mailing list
phas-dept at tamuc.edu
http://mailman.tamuc.edu/mailman/listinfo/phas-dept
More information about the phas-undergrad
mailing list