Field-Angle Evolution of the Superconducting and Magnetic Phases of UTe2 around the b Axis

Published

November 27, 2024

Author(s)

Sylvia Lewin, Josephine Yu, Corey Frank, David Graf, Patrick Chen, Sheng Ran, Yun Eo, Johnpierre Paglione, S. Raghu, Nicholas Butch

Abstract

We experimentally determine the bounds of the magnetic-field-induced superconducting and magnetic phases near the crystalline b axis of uranium ditelluride (UTe2). By measuring the magnetoresistance as a function of rotation angle and field strength in magnetic fields as large as 41.5 T, we have studied these boundaries in three dimensions of magnetic field direction. The phase boundaries in all cases obey crystallographic symmetries and no additional symmetries, evidence against any symmetry-breaking quadrupolar or higher magnetic order. We find that the upper critical field of the zero-field superconducting state is well-described by an anisotropic mass model. In contrast, the angular boundaries of the b-axis-oriented field-reentrant superconducting phase are nearly constant as a function of field up to the metamagnetic transition, with anisotropy between the ab and bc planes that is comparable to the angular anisotropy of the metamagnetic transition itself. We discuss the relationship between the observed superconducting boundaries and the underlying d vector that represents the spin-triplet order parameter. Additionally, we report an unexplained normal-state feature in resistance and track its evolution as a function of field strength and angle.

Citation

Physical Review B

Volume

110

Issue

18

Pub Type

Journals

Download Paper

https://doi.org/10.1103/PhysRevB.110.184520

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Keywords

Superconductivity, high magnetic fields, heavy fermion

Citation

Lewin, S. , Yu, J. , Frank, C. , Graf, D. , Chen, P. , Ran, S. , Eo, Y. , Paglione, J. , Raghu, S. and Butch, N. (2024), Field-Angle Evolution of the Superconducting and Magnetic Phases of UTe2 around the b Axis, Physical Review B, [online], https://doi.org/10.1103/PhysRevB.110.184520, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=957491 (Accessed October 9, 2025)