BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Twist to the M-ax(is): A New Moiré Platform Based on M-Point Twis
 ting - Dumitru Calugaru\, Princeton and Oxford
DTSTART:20241121T140000Z
DTEND:20241121T153000Z
UID:TALK219745@talks.cam.ac.uk
CONTACT:Gaurav
DESCRIPTION:We introduce a new class of moiré systems based on monolayers
  with triangular lattices and low-energy states at the M points of the Bri
 llouin zone. These M-point moiré materials differ fundamentally from thos
 e derived from Γ- or K-point monolayers\, featuring three time-reversal-p
 reserving valleys connected by three-fold rotational symmetry. We propose 
 twisted bilayers of exfoliable 1T-SnSe2 and 1T-ZrS2 as examples of this ne
 w class. Using extensive ab initio simulations\, we develop continuum mode
 ls and show that the M-point moiré Hamiltonians exhibit emergent momentum
 -space non-symmorphic symmetries and a kagome lattice in momentum space. T
 his is the first experimentally viable realization of a projective represe
 ntation of crystalline space groups in a non-magnetic system. These materi
 als also serve as six-flavor Hubbard simulators with Mott physics\, indica
 ted by their flat Wilson loops. Additionally\, non-symmorphic momentum-spa
 ce symmetries make the M-point Hamiltonians quasi-one-dimensional in each 
 valley\, suggesting the potential for realizing Luttinger liquid physics. 
 We predict the twist angles for the emergence of flat conduction bands\, p
 rovide a continuum Hamiltonian\, analyze its topology and charge density\,
  and discuss aspects of the physics of this new platform.
LOCATION:TCM Seminar Room
END:VEVENT
END:VCALENDAR