University of Waterloo
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
Phone: (519) 888-4567 ext 32215
Fax: (519) 746-8115
Département de physique, Université de Sherbrooke
Dr. Garate a theorist interested in quantum condensed matter theory, whose research interests are driven by a desire to build connections between different topics. Particular emphasis analytical solutions involving the application of standard quantum field theory methods, which are essential in order to understand the behavior of interacting electrons in solids.
Recent theoretical work has established the existence of hidden spin and orbital textures in non-magnetic materials with inversion symmetry. Here, we propose that these textures can be detected by nuclear magnetic resonance (NMR) measurements carried out in the presence of an electric field. In crystals with hidden polarizations, a uniform electric field produces a staggered magnetic field that points to opposite directions at atomic sites related by spatial inversion. As a result, the NMR resonance peak corresponding to inversion partner nuclei is split into two peaks. The magnitude of the splitting is proportional to the electric field and depends on the orientation of the electric field with respect to the crystallographic axes and the external magnetic field. As a case study, we will present the theory of electric-field-induced splitting of 209Bi peaks in Bi2Se3. We will also mention other potentially more promising candidate materials, whose crystal symmetry enables strategies to suppress the linewidth produced by the Oersted field.