Physics Colloquium Series (02.06) | Nadya Mason
Thursday, February 06, 2020 at 4:00pm to 5:00pm
The David and Edith Harris Physics Colloquium Series
Speaker: Nadya Mason | University of Illinois, Urbana-Champaign
"Controlling Dissipation in Superconductors: the Oxymoron that Leads to New Superconducting Phases and Transitions "
Superconductors are exciting materials for basic physics and applications because they conventionally exhibit zero-resistance and zero-dissipation (i.e., no energy loss). In contrast, unconventional superconductors—including high-temperature superconductors and hybrid superconductor-normal (S-N) systems relevant to quantum computation—combine superconductivity with dissipative normal metal-like states. Yet dissipation has been difficult to control and parametrize. In this talk, I will discuss electrical transport experiments on hybrid superconductor-normal metal systems where the dissipation is controlled, leading to new understanding of superconducting states and transitions. In particular, I will show how superconductivity is established in granular S-N systems, how metallic states appear in arrays of S-N systems as the normal metal fraction is increased, and how magnetic fields can be used to control a variety of dissipative phase transitions. The results are relevant to understanding the role of dissipation in superconducting systems, and in correlated materials in general.
The lecture will take place in 10-250, starting at 4pm.
Pre-Colloquium Social in room 4-349 will begin at 3:30pm, refreshments will be served.
For questions, contact Ryan Higgins at firstname.lastname@example.org
See future Physics Colloquium lectures at: https://web.mit.edu/physics/events/colloquia.html