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Akademický článek

Comparison of two superconducting phases induced by a magnetic field in UTe2

Autor: W. Knafo, M. Nardone, M. Vališka, A. Zitouni, G. Lapertot, D. Aoki, G. Knebel, D. Braithwaite

Publikováno v: Communications Physics, Vol 4, Iss 1, Pp 1-9 (2021)

In a magnetic field, superconductivity can be induced or reinforced near a metamagnetic transition, where ferromagnetic fluctuations are suspected to mediate the pairing strength of the Cooper pairs. Here, the authors investigate the superconductor U

Externí odkaz: https://doaj.org/article/0f755ab101b54196bfff570e76d4f437

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Akademický článek

Field-induced spin-density wave beyond hidden order in URu2Si2

Autor: W. Knafo, F. Duc, F. Bourdarot, K. Kuwahara, H. Nojiri, D. Aoki, J. Billette, P. Frings, X. Tonon, E. Lelièvre-Berna, J. Flouquet, L.-P. Regnault

Publikováno v: Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016)

The strongly-correlated electron system URu2Si2 possesses a hidden-order phase whose order parameter remains unidentified. Here, the authors demonstrate the development of spin-density-wave phases in URu2Si2under high magnetic fields, providing a pot

Externí odkaz: https://doaj.org/article/0939416823f8425fbf89ebeaa343cfe9

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Akademický článek

Evidence of Fermi surface reconstruction at the metamagnetic transition of the strongly correlated superconductor UTe_{2}

Autor: Q. Niu, G. Knebel, D. Braithwaite, D. Aoki, G. Lapertot, M. Vališka, G. Seyfarth, W. Knafo, T. Helm, J.-P. Brison, J. Flouquet, A. Pourret

Publikováno v: Physical Review Research, Vol 2, Iss 3, p 033179 (2020)

Thermoelectric power (S) and Hall effect (R_{H}) measurements on the paramagnetic superconductor UTe_{2} with the magnetic field applied along the hard magnetization b axis are reported. The first-order nature of the metamagnetic transition at H_{m}=

Externí odkaz: https://doaj.org/article/ebc8e0c074724d11bcbaebb7eebdd9f7

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Akademický článek

Anomalous high-magnetic field electronic state of the nematic superconductors FeSe_{1−x}S_{x}

Autor: M. Bristow, P. Reiss, A. A. Haghighirad, Z. Zajicek, S. J. Singh, T. Wolf, D. Graf, W. Knafo, A. McCollam, A. I. Coldea

Publikováno v: Physical Review Research, Vol 2, Iss 1, p 013309 (2020)

Understanding superconductivity requires detailed knowledge of the normal electronic state from which it emerges. A nematic electronic state that breaks the rotational symmetry of the lattice can potentially promote unique scattering relevant for sup

Externí odkaz: https://doaj.org/article/5eddf7636db84f089b2cb884d89ae38a

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Anisotropic signatures of electronic correlations in the electrical resistivity of UTe 2

Autor: T. Thebault, M. Vališka, G. Lapertot, A. Pourret, D. Aoki, G. Knebel, D. Braithwaite, W. Knafo

Publikováno v: Physical Review B
Physical Review B, 2022, 106 (14), pp.144406. ⟨10.1103/PhysRevB.106.144406⟩

Multiple unconventional superconducting phases are suspected to be driven by magnetic fluctuations in the heavy-fermion paramagnet UTe$_2$, and a challenge is to identify the signatures of the electronic correlations, including the magnetic fluctuati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d4319f968b789b67c3350dd62992943
https://hal.science/hal-03958866

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Possible stripe phases in the multiple magnetization plateaus in TbB4 from single-crystal neutron diffraction under pulsed high magnetic fields

Autor: N. Qureshi, F. Bourdarot, E. Ressouche, W. Knafo, F. Iga, S. Michimura, L.-P. Regnault, F. Duc

Publikováno v: Physical Review B. 106

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::98e8a626f006f878747945733e255fd3
https://doi.org/10.1103/physrevb.106.094427

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Akademický článek

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Magnetic reshuffling and feedback on superconductivity in UTe 2 under pressure

Autor: M. Vališka, W. Knafo, G. Knebel, G. Lapertot, D. Aoki, D. Braithwaite

Publikováno v: Physical Review B
Physical Review B, 2021, 104 (21), pp.214507. ⟨10.1103/PhysRevB.104.214507⟩
Physical Review B, American Physical Society, 2021, 104 (21), pp.214507. ⟨10.1103/PhysRevB.104.214507⟩

The discovery of superconductivity in the heavy-fermion paramagnet UTe$_2$ has attracted a lot of attention, particularly due to the reinforcement of superconductivity near pressure- and magnetic-field-induced magnetic quantum phase transitions. A ch

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39d1baa1b8b92d5bde720cb18e7ecd3c
https://hal.univ-grenoble-alpes.fr/hal-03519715

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Akademický článek

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Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe$_2$

Autor: Jean-Pascal Brison, Paul Steffens, W. Knafo, A. Rosuel, Jacques Flouquet, Georg Knebel, Daisuke Aoki, Gérard Lapertot, Koji Kaneko, Stéphane Raymond

Publikováno v: Physical Review B
Physical Review B, 2021, 104 (10), pp.L100409. ⟨10.1103/PhysRevB.104.L100409⟩
Physical Review B, American Physical Society, 2021, 104 (10), pp.L100409. ⟨10.1103/PhysRevB.104.L100409⟩

Inelastic-neutron-scattering measurements were performed on a single crystal of the heavy-fermion paramagnet UTe$_2$ above its superconducting temperature. We confirm the presence of antiferromagnetic fluctuations with the incommensurate wavevector $

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e6e767d63420edcad905c81b46690ea
http://arxiv.org/abs/2106.13087

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