BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Syed Raza\, UVA- Physics Department\n\n
Topological  \;We yl and Dirac semimetals in three dimensions have gapless (massless) Weyl f ermions. These semimetals were predicted theoretically in 2011 (Vishwanath et al\, Burkov and Balents) and have been experimentally discovered recen tly in TaAs\, TaP\, NbAs\, NbP (Weng et al.\, Huang et al.\, Shekhar et al .\, 2015). Although these gapless systems can be gapped (given mass) trivi ally by symmetry breaking terms\, a more interesting problem is if they ca n be gapped without breaking symmetries? We show that you can indeed do th is by introducing many body interactions. We also show that this symmetry- preserving gapping gives point-like and line-like anyonic excitations in t he gapped bulk. \;
\n DTSTART:20170413T193000Z LOCATION:Physics Building\, Room 204 SUMMARY:Symmetry preserving gapping of Topological Weyl and Dirac semimetal s END:VEVENT END:VCALENDAR