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Condensed Matter Seminar: "Exotic superconductivity in uranium ditelluride"

Event Type
Seminar/Symposium
Sponsor
Physics - Condensed Matter
Location
190 ESB
Date
Jan 31, 2020   1:00 pm  
Speaker
Nicholas Butch, NIST
Views
81
Originating Calendar
Physics - Condensed Matter Seminar

We recently discovered a new superconducting state in UTe2 below 1.6 K. This state emerges from a heavy fermion normal state, coexists with strong spin fluctuations, has an extremely high upper critical field of 35 T, and supports an even higher-field reentrant superconducting phase between 40 T and 65 T.  In this talk, I will describe how superconductivity in UTe2 dramatically differs from conventional superconductivity, including the possibility that it is topologically nontrivial.  I will emphasize its very unusual behavior in magnetic field.

1. Ran, C. Eckberg, Q.-P. Ding, Y. Furukawa, T. Metz, S. R. Saha, I-L. Liu, M. Zic, H. Kim, J. Paglione, and N. P. Butch, "Nearly ferromagnetic spin-triplet superconductivity," Science 365, 684 (2019).

2. Ran, I-L. Liu, Y. S. Eo, D. J. Campbell, P. Neves, W. T. Fuhrman, S. R. Saha, C.  Eckberg, H. Kim, D. Graf, F. Balakirev, J. Singleton, J. Paglione, and N. P. Butch, “Extreme magnetic field-boosted superconductivity,” Nature Physics 15, 1250 (2019).

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