BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Quantum transport and frustrated magnetism in strained graphene\, 
 Dr. Christophe De Beule\, Antwerp University
DTSTART:20260512T053000Z
DTEND:20260512T070000Z
DTSTAMP:20260502T192800Z
UID:indico-event-191@indico.phys.nthu.edu.tw
DESCRIPTION:Lattice deformations in graphene couple to the low-energy Dira
 c electrons as effective scalar and gauge fields. In this talk\, I will di
 scuss how strain-induced pseudogauge fields can be leveraged to design str
 aintronics devices for studying quantum interference and strongly-correlat
 ed electronic phases. First\, I will introduce pseudogauge fields in grap
 hene\, and discuss the role of acoustic and optical deformations [1]. I wi
 ll then present a theory for a simple straintronics device that consists o
 f graphene suspended between two misaligned gate electrodes\, resulting in
  a pseudogauge barrier from localized uniaxial strain. This device hosts g
 ate-tunable conductance resonances\, a 1D channel of valley chiral or coun
 terpropagating modes that provides a simple platform for Luttinger liquid 
 physics\, and sublattice-resolved Friedel oscillations. Finally\, I will s
 how that our theory explains a recent experiment in terms of a hybrid pseu
 dogauge and electrostatic interferometer [2]. In the second part\, I will
  show how topological flatbands can be engineered in bilayer graphene wit
 h periodic strain by depositing it on a patterned hBN substrate [3]. I wil
 l share experimental results that show evidence of frustrated magnetism in
  this system\, discuss the microscopic origin of the local spins\, and sho
 w that classical Monte Carlo spin-ice simulations can explain the observed
  hysteresis in terms of emergent magnetic charges. [1] Elastic Screening 
 of Pseudogauge Fields in Graphene\, C. De Beule\, R. Smeyers\, W. N. Luna\
 , E. J. Mele\, and L. Covaci\, Phys. Rev. Lett. 134\, 046404 (2025).[2] Ga
 te-Tunable Resonances and 1D Channel in a Graphene Nanoslide\, C. De Beul
 e\, M.-H. Liu\, B. Partoens\, and L. Covaci\, arXiv:2512.22982 (2025).[3] 
 Frustrated Magnetism in Strain-Patterned Graphene Superlattices\, Y.-C. H
 sieh\, W.-H. Kao\, C. De Beule\, et al. Under review in Nature (2025).\n\n
 https://indico.phys.nthu.edu.tw/event/191/
URL:https://indico.phys.nthu.edu.tw/event/191/
END:VEVENT
END:VCALENDAR