Theory of the low- and high-field superconducting phases of UTe${}_2$

Abstract

Recent nuclear magnetic resonance (NMR) and calorimetric experiments have observed that UTe${}_2$ exhibits a transition between two distinct superconducting phases as a function of magnetic field strength for a field applied along the crystalline $b$-axis. To determine the nature of these phases, we employ a microscopic two-band minimal Hamiltonian with the essential crystal symmetries and structural details. We also adopt anisotropic ferromagnetic exchange terms. We study the resulting pairing symmetries and properties of these low- and high-field phases in mean field theory.

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Cited by in corpus (6)

• Enhanced triplet superconductivity in next generation ultraclean UTe2
• Superconducting Diode Effect in Multiphase Superconductors
• Anisotropic field-induced changes in the superconducting order parameter of UTe2
• Theoretical studies on off-axis phase diagrams and Knight shifts in UTe${}_2$ -- Tetra-critical point, d-vector rotation, and multiple phases
• Field-angle evolution of the superconducting and magnetic phases of UTe${}_2$ around the $b$ axis
• Two-dimensional flat band on the (011) surface of UTe${}_2$: Implication for STM measurements with a superconducting tip