---------- Forwarded message ----------
From: Lesley Keaney <lkeaney@mit.edu<mailto:lkeaney@mit.edu>>
Date: Thu, Feb 15, 2018 at 12:16 PM
Subject: Special Chez Pierre Seminar_Thursday, February 22, 2018 @ 10:30am in 4-331
To: chezpierre <chezpierre@mit.edu<mailto:chezpierre@mit.edu>>, cmt_seminar
<cmt_seminar@mit.edu<mailto:cmt_seminar@mit.edu>>
Hello everyone,
Please note there will not be a Chez Pierre seminar on Monday, February 19, 2018 due to
the Presidents Day Holiday.
A Special Chez Pierre Seminar will be held on Thursday, February 22, 2018 at 10:30am in
the MIT Duboc room 4-331.
Coffee and pastries will be available prior to the talk at 10:15am
Marco Polini1, 1 Istituto Italiano di Tecnologia
"Topological and quantum plasmonics."
When electromagnetic fields are confined through the use of e.g. noble-metal plasmons,
losses tend to be high and greatly limit the propagation distance of these collective
modes. Substantial efforts have been recently made to increase the lifetime of these modes
at room temperature [1,2], without decreasing the associated confining power. A possible
pathway is to use plasmons in topologically-non-trivial materials [3-6]. In this talk, I
will present a fully quantum-mechanical theory of Weyl semimetal (WSM) Fermi Arc (FA)
plasmons [6]. Our theory focuses on the simplest microscopic model Hamiltonian [7] of a
type-I WSM with broken time-reversal symmetry and is based on linear response theory [8]
and the random phase approximation [8]. I will first highlight how quantum non-local
effects are crucial to understand WSM FA plasmon physics and, if time allows, discuss
recent progress in understanding quantum non-local effects in graphene plasmonics [9].
Work supported by the European Union's Horizon 2020 research and innovation programme
under grant agreement No. 696656 "Graphene Core1".
[cid:image001.png@01D3A656.CC7C41D0]
References
[1] For a recent review see, e.g., D.N. Basov, M.M. Fogler, and F.J. García de Abajo,
Science 354, 6309 (2016).
[2] A. Woessner et al., Nature Mater. 14, 421 (2015).
[3] J.C.W. Song and M.S. Rudner, Proc. Natl. Acad. Sci. (USA) 113, 4658 (2016).
[4] D. Jin, L. Lu, Z. Wang, C. Fang, J.D. Joannopoulos, M. Soljačić, L. Fu, and N.X. Fang,
Nature Commun. 7, 13486 (2016).
[5] J.C.W. Song and M.S. Rudner, Phys. Rev. B 96, 205443 (2017).
[6] G.M. Andolina et al., arXiv:1706.06200.
[7] R. Okugawa and S. Murakami, Phys. Rev. B 89, 235315 (2014).
[8] D. Pines and P. Noziéres, The Theory of Quantum Liquids (W.A. Benjamin, Inc., New
York, 1966).
[9] M.B. Lundeberg et al., Science 357, 187 (2017).
Talk: 10:30am
Room: 4-331, Duboc Room
Coffee: 10:15am *(As always please remember to dispose of your plates and cups in the
large trash containers when you leave the Duboc Room, thank you).
Host: Leonid Levitov
Chez Pierre seminars are usually scheduled for Mondays at noon in the MIT Duboc Room,
4-331. Seminar speakers, titles and abstracts will be posted on the Chez Pierre website
at:
http://web.mit.edu/physics/cmt/chezp.html.
Thank you,
Lesley
Lesley Keaney
Administrative Assistant
Condensed Matter Theory Group
MIT Department of Physics
Room 6C-339
Cambridge, MA 02139
617.253.4878<tel:(617)%20253-4878> (phone); 617.253.2562<tel:(617)%20253-2562>
(fax)