A topological phase transition in the Lanthanum Monopnictides as observed with ARPES
ORAL
Abstract
The family of binary Lanthanum monopnictides, LaBi, LaSb, and LaAs have attracted a great deal of attention as they display an unusual “extreme” magnetoresistance (XMR) that is not well understood. Possible mechanisms involving non-trivial topology of band structure have been proposed. In this talk, I will present ARPES measurements from LaBi, LaSb, and LaAs which show a clear topological phase transition within the chemical family. The persistence of XMR on either side of this phase transition is incompatible with proposed mechanisms for XMR which involve Z2 topological order as a prerequisite.
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Presenters
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Tom Nummy
- Physics, Univ of Colorado - Boulder
- Physics, University of Colorado - Boulder
- University of Colorado