Nearly ferromagnetic spin-triplet superconductivity.
Sheng Ran,Sheng Ran,Chris Eckberg,Qing-Ping Ding,Yuji Furukawa,Tristin Metz,Shanta Saha,Shanta Saha,I-Lin Liu,I-Lin Liu,Mark Zic,Hyunsoo Kim,Johnpierre Paglione,Johnpierre Paglione,Nicholas P. Butch,Nicholas P. Butch +15 more
TLDR
The discovery of spin-triplet superconductivity in UTe2, featuring a transition temperature of 1.6 kelvin and a very large and anisotropic upper critical field exceeding 40 teslas, suggests that UTe1 is related to ferromagnetic superconductors such as UGe2, URhGe, and UCoGe, however, the lack of magnetic order and the observation of quantum critical scaling place U Te2 at the paramagnetic end of this ferromAbstract:
Spin-triplet superconductors potentially host topological excitations that are of interest for quantum information processing. We report the discovery of spin-triplet superconductivity in UTe2, featuring a transition temperature of 1.6 kelvin and a very large and anisotropic upper critical field exceeding 40 teslas. This superconducting phase stability suggests that UTe2 is related to ferromagnetic superconductors such as UGe2, URhGe, and UCoGe. However, the lack of magnetic order and the observation of quantum critical scaling place UTe2 at the paramagnetic end of this ferromagnetic superconductor series. A large intrinsic zero-temperature reservoir of ungapped fermions indicates a highly unconventional type of superconducting pairing.read more
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Metallic Quantum Ferromagnets
TL;DR: In this article, the authors used the National Science Foundation (NSF) under grant numbers NSF DMR-09-29966, DMR09-01907, D MR-1401410, and D MMR-1401449, and by the Deutsche Forschungsgemeinschaft under grant number FOR-960.
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Pauli-limit violation and re-entrant superconductivity in moiré graphene.
TL;DR: In this article, the authors show that magic-angle twisted trilayer graphene exhibits superconductivity up to in-plane magnetic fields in excess of 10 T, which represents a large (2-3 times) violation of the Pauli limit for conventional spin-singlet superconductors.
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Chiral superconductivity in heavy-fermion metal UTe 2
Lin Jiao,Sean Howard,Sheng Ran,Sheng Ran,Zhenyu Wang,Jorge Olivares Rodriguez,Manfred Sigrist,Ziqiang Wang,Nicholas P. Butch,Nicholas P. Butch,Vidya Madhavan +10 more
TL;DR: Scanning tunnelling microscopy and spectroscopy measurements show chiral edge states inside the superconducting gap of the recently discovered heavy-fermion superconductor UTe2, indicating the presence of chiral spin-triplet superconductivity.
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An Organic Host–Guest System Producing Room-Temperature Phosphorescence at the Parts-Per-Billion Level
TL;DR: In this article, a series of fluorescent naphthalimides, which did not originally show observable phosphorescence in solution, as aggregates, in polymer films, or in any other tested host material, including heavy-atom matrices at cryogenic temperatures, can now efficiently produce ultralong RTP (ϕ=0.17, τ=243 ms) in phthalimide hosts.
Journal ArticleDOI
Coexistence of ferromagnetic fluctuations and superconductivity in the actinide superconductor UTe 2
Shyam Sundar,Shayan Gheidi,K. Akintola,Andre Cote,Andre Cote,S. R. Dunsiger,S. R. Dunsiger,Sheng Ran,Sheng Ran,Nicholas P. Butch,Nicholas P. Butch,Shanta Saha,Johnpierre Paglione,Johnpierre Paglione,Jeff Sonier,Jeff Sonier +15 more
TL;DR: In this paper, the authors reported low-temperature muon spin relaxation/rotation measurements on single crystals of the actinide superconductor and found no evidence of long-range or local magnetic order down to 0.025 K.
References
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