Quantum Effects of Strong Magnetic Fields in Semimetallic Films and Wires

Speaker: 
Danny Bulmash
Event Date and Time: 
Mon, 2016-11-28 12:00 - 13:00
Location: 
Hennings318
Local Contact: 
Mracel Franz
Intended Audience: 
Graduate

Motivated by Weyl and Dirac semimetals, I will show theoretically that strong magnetic fields can induce novel quasi-lower-dimensional physics in semimetallic films and wires. First, I will propose that a thin film of Weyl or Dirac semimetal with a strong in-plane magnetic field becomes a quasi-two-dimensional Fermi liquid displaying quantum oscillations that depend on field angle in a highly unusual way. I will discuss the utility of these oscillations for probing Fermi arcs. Motivated by our Fermi liquid picture, I will then consider a general semimetal in a wire geometry, retaining the strong orbital field, and add interactions. I will show that even thick wires can display several strongly interacting quasi-one-dimensional phases, including a peculiar pseudospin-triplet analogue of the Luther-Emery phase.

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