Extreme magnetic field-boosted superconductivity

Christopher Eckberg; Daniel J. Campbell; David Graf; Hyunsoo Kim; I-Lin Liu; Johnpierre Paglione; John Singleton; Nicholas P. Butch; Paul Neves; Shanta R. Saha

Extreme magnetic field-boosted superconductivity

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arxiv 1905.04343 v1 pith:BNNN5AOQ submitted 2019-05-10 cond-mat.supr-con

Extreme magnetic field-boosted superconductivity

Sheng Ran , I-Lin Liu , Yun Suk Eo , Daniel J. Campbell , Paul Neves , Wesley T. Fuhrman , Shanta R. Saha , Christopher Eckberg

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Hyunsoo Kim Johnpierre Paglione David Graf John Singleton Nicholas P. Butch

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classification cond-mat.supr-con

keywords magneticsuperconductivityfieldsquantumreentrantexoticextremesuperconductor

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Applied magnetic fields underlie exotic quantum states, such as the fractional quantum Hall effect and Bose-Einstein condensation of spin excitations. Superconductivity, on the other hand, is inherently antagonistic towards magnetic fields. Only in rare cases can these effects be mitigated over limited fields, leading to reentrant superconductivity. Here, we report the unprecedented coexistence of multiple high-field reentrant superconducting phases in the spin-triplet superconductor UTe2. Strikingly, we observe superconductivity in the highest magnetic field range identified for any reentrant superconductor, beyond 65 T. These extreme properties reflect a new kind of exotic superconductivity rooted in magnetic fluctuations and boosted by a quantum dimensional crossover.

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Cited by 1 Pith paper

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Thermodynamic Investigation of Metamagnetism in Pulsed High Magnetic Fields on Heavy Fermion Superconductor UTe$_2$
cond-mat.str-el 2019-07 unverdicted novelty 5.0

Pulsed-field thermodynamics on UTe2 shows a first-order metamagnetic transition at 36 T with diverging γN, indicating quantum fluctuations that stabilize superconductivity in high fields.