Thursday, Dec 7th:Probing topological superconductivity in HgTe quantum wells

Event Date: 

Thursday, December 7, 2017 - 3:45pm

Event Date Details: 

Refreshments served at 3:30pm.

Event Location: 

  • Broida 1640
  • ABC...z Seminar Series

Topological superconductivity is an exciting new field where novel phases of matter emerge through the combination of topological orders and superconductivity. Recent experiments have demonstrated innovative ways to probe these exotic phases, some of which are predicted to host Majorana Zero Modes - a long-sought-after quasi-particle state critical to the realization of topological quantum computation. Breakthroughs have been made in various one-dimensional systems as building blocks of this computing scheme. Meanwhile, two-dimensional systems have attracted increasing interest due to their capacities for large-scale fabrication and possibilities for more control knobs. In my PhD projects on HgTe quantum wells, we fabricate Josephson junctions and other superconducting devices, and explore the emerging physics that arise both from the boundary and the bulk. In this talk, I will present results on induced superconductivity related to the quantum spin Hall effect and to finite momentum pairing controlled by magnetic fields. These results demonstrate the promise of two-dimensional systems in studying topological superconductivity, and will open doors to a wide variety of future experiments both for investigating new phases of matter and for the pursuit of topological quantum computation.

Hechen Ren, Harvard University