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DTSTAMP:20260405T171332Z
UID:1718355600@ist.ac.at
DTSTART:20240614T110000
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DESCRIPTION:Speaker: Dr. Blesson Sam Varghese\nhosted by Hryhoriy Polshyn\n
 Abstract: Title: "Strain engineering graphene and bilayer graphene transpo
 rt properties"Abstract : By mechanically distorting a crystal lattice\, i
 t is possible to engineer the electronic and optical properties of a mater
 ial. Van der Waals materials are an ideal platform for strain engineering 
 due to their excellent in-plane stiffness and mechanical flexibility. Pred
 icted effects of external strain on graphene include changes in the magnit
 ude and isotropy of Fermi velocity\, shifts in the energy of Dirac cones\,
  and shifts in the position of Dirac cones within the 2D Brillouin zone. P
 revious experiments have studied these effects on a local scale using STM 
 and Kelvin probe force microscopy. With the in situ strain tuning capabili
 ty developed in the lab\, we investigate the effects of strain on quantum 
 transport in graphene and bilayer graphene at cryogenic temperatures. Bey
 ond straining\, techniques to generate strain-induced electric fields and 
 pseudo-magnetic fields by engineering strain gradients through device junc
 tion geometry are also explored in van der Waals material systems. Strain 
 and strain gradients emerge as new control parameters in quantum transport
  experiments in van der Waals materials\, alongside charge carrier densit
 y\, electric fields\, and magnetic fields.
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:
SUMMARY:Dr. Blesson Sam Varghese: Special Condensed Matter Seminar 
URL:https://talks-calendar.ista.ac.at/events/5043
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