Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session A29: UTe2 and Actinide Heavy Fermion Materials
8:00 AM–11:00 AM,
Monday, March 6, 2023
Room: Room 221
Sponsoring
Unit:
DCMP
Chair: Ravhi Kumar, University of Illinois at Chicago
Abstract: A29.00009 : Dynamic magnetotropic coefficient measurements in UTe2
9:36 AM–9:48 AM
Presenter:
Amit Nathwani
(IST Austria)
Authors:
Amit Nathwani
(IST Austria)
Valeska Zambra
(Institute of Science and Technology Austria)
Muhammad Nauman
(Institute of Science and Technology Austria)
Kimberly Modic
(Institute of Science and Technology Austria)
Arkady Shekhter
(Los Alamos national Laboratory)
Brad J Ramshaw
(Cornell University)
physical phenomena, often due to the presence of f -electrons. We study UTe2, an example of a heavy fermion system,
which also exhibits several features consistent with spin-triplet superconductivity. One of the most convincing
features is a re-entrant superconducting state observed in high magnetic fields, ranging from 40-65 Tesla.
An important open question in UTe2 is what mechanism supports the observed re-entrant superconducting state.
In order to better understand this mechanism, we probe the high field re-entrant superconducting state and the
surrounding magnetic phases using a novel technique that measures the magnetotropic coefficient. In high magnetic
fields, we study how this energy, which is associated with magnetically anisotropic fluctuations, is dissipated across
the high field phase diagram of UTe2. Our preliminary measurements at 4K show evidence of slow dynamics that
could shed light on the nature of transport behaviour near the re-entrant superconducting state.
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