Reinforcement of superconductivity by quantum critical fluctuations of metamagnetism in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">UTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>

Tokiwa, Y.; Opletal, P.; Sakai, H.; Kambe, S.; Yamamoto, E.; Kimata, M.; Awaji, S.; Sasaki, T.; Aoki, D.; Haga, Y.; Tokunaga, Y.

doi:10.1103/physrevb.109.l140502

Phys. Rev. B

2024

DOI: 10.1103/physrevb.109.l140502

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Reinforcement of superconductivity by quantum critical fluctuations of metamagnetism in UTe2

Y. Tokiwa,

P. Opletal,

H. Sakai

et al.

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2024

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Enhanced triplet superconductivity in next-generation ultraclean UTe ₂

Wu,

Weinberger,

Chen

et al. 2024

Proc. Natl. Acad. Sci. U.S.A.

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The unconventional superconductor UTe 2 exhibits numerous signatures of spin-triplet superconductivity—a rare state of matter which could enable quantum computation protected against decoherence. UTe 2 possesses a complex phase landscape comprising two magnetic field-induced superconducting phases, a metamagnetic transition to a field-polarized state, along with pair- and charge-density wave orders. However, contradictory reports between studies performed on UTe 2 specimens of varying quality have severely impeded theoretical efforts to understand the microscopic origins of the exotic superconductivity. Here, we report a comprehensive suite of high magnetic field measurements on a generation of pristine quality UTe 2 crystals. Our experiments reveal a significantly revised high magnetic field superconducting phase diagram in the ultraclean limit, showing a pronounced sensitivity of field-induced superconductivity to the presence of crystalline disorder. We employ a Ginzburg–Landau model that excellently captures this acute dependence on sample quality. Our results suggest that in close proximity to a field–induced metamagnetic transition the enhanced role of magnetic fluctuations—that are strongly suppressed by disorder—is likely responsible for tuning UTe 2 between two distinct spin-triplet superconducting phases.

show abstract

Enhanced triplet superconductivity in next-generation ultraclean UTe ₂

Wu,

Weinberger,

Chen

et al. 2024

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

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Reinforcement of superconductivity by quantum critical fluctuations of metamagnetism in UTe2

Cited by 1 publication

References 57 publications

Enhanced triplet superconductivity in next-generation ultraclean UTe ₂

Enhanced triplet superconductivity in next-generation ultraclean UTe ₂

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Reinforcement of superconductivity by quantum critical fluctuations of metamagnetism in UTe2

Cited by 1 publication

References 57 publications

Enhanced triplet superconductivity in next-generation ultraclean UTe 2

Enhanced triplet superconductivity in next-generation ultraclean UTe 2

Contact Info

Product

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About

Enhanced triplet superconductivity in next-generation ultraclean UTe ₂

Enhanced triplet superconductivity in next-generation ultraclean UTe ₂