LPS Seminar

Date
Wed, Nov 20, 2019 3:00 pm - 4:00 pm
Location
8050 Greenmead Drive, College Park, MD 20740,

Description



Exotic spin-triplet superconductivity in nearly ferromagnetic UTe2
Speaker Name: Prof. Johnpierre Paglione
Speaker Institution : University of Maryland
Notes: Refreshments served at 2:30pm. For more information please contact Dave Bowen [This email address is being protected from spambots. You need JavaScript enabled to view it.] or Prof. Isaak Mayergoyz.


Abstract : Topological superconductivity has attracted great interest in condensed matter physics because of its potential applications in quantum computing. Spin-triplet superconductors are one promising class that can host the topological excitations of interest, but experimental realizations are few and far between. Here we report the discovery and properties of superconductivity in UTe2, a material closely related to known ferromagnetic superconductors such as UGe2, URhGe, and UCoGe, but lacking long-range magnetic order. Several experimentally measured properties feature telltale indications of an unconventional energy gap and a spin-triplet pairing state that is consistent with the presence of strong magnetic fluctuations due to an incipient quantum critical point. Furthermore, the superconductivity in UTe2 is remarkably robust to extremely high magnetic fields, showing re-entrant pairing up to at least 65 Tesla. I will review basic properties and our detailed investigations of the gap structure, relation to incipient magnetic order and Kondo coherence, as well as indications of an anomalous normal state fluid that suggest many surprises await for this exotic material.








Biography

Johnpierre Paglione directs a research group in the Quantum Materials Center at the University of Maryland. His team has contributed to several fields of condensed matter research through both single-crystal synthesis of superconducting, quantum-critical and topological materials, as well as exploration of novel phenomena. He is a leader in the field of quantum criticality and has made important contributions to the fields of heavy-fermion materials and the quasiparticle picture of correlated materials. Dr. Paglione has more recently pursued several new areas of research including iron-based high-temperature superconductivity and topological insulators and superconductors. He is the recipient of a National Postdoctoral Fellowship Award from the Natural Sciences and Engineering Council of Canada, a National Science Foundation CAREER Award and an Early Career Award from the Department of Energy, and has been selected for an EPiQS Materials Synthesis Investigator Award by the Gordon & Betty Moore Foundation. Dr. Paglione earned his Ph.D. from the University of Toronto in Canada.

*NEW POLICY: All Visitors to LPS must present a photo ID for entry to the colloquium*


Note: LPS is located at 8050 Greenmead Drive in College Park. There is parking at LPS and overflow parking at the adjacent LTS building but not at the 4H building. LPS is on the UMCP shuttle route; take #105 for the Courtyard Apts. Please use the phone on the left hand side of the front door to call the receptionist for entry.