282 citations · 4.3k across the 113 of their papers we have counts for
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Multiple Superconducting Phases under Pressure for Different Field Directions in UTe2
Dai Aoki, Atsushi Miyake, Ai Nakamura +7
The existence of multiple superconducting phases is a striking feature of UTe2, arising from the spin and orbital degrees of freedom and supporting a spin-triplet superconducting s…
Successive Electronic Topological Transitions in the Antiferromagnet UPdAl
Adrien Gourgout, Gaël Bastien, Dai Aoki +7
We report successive anomalies at low temperature in the magnetic field dependence of the thermoelectric signal in the heavy fermion compound UPdAl inside the antiferro…
Unusual upper critical field in UTe2 revealed by magnetotransport measurements up to 42 T
Macha Méplan, Ilya Sheikin, Pierre Pugnat +16
The heavy-fermion superconductor UTe2 is unique in that, at ambient pressure, it exhibits three distinct superconducting phases, two of which are induced by magnetic field. When th…
Metastability of the Topological Magnetic Orders in the Chiral Antiferromagnet EuPtSi
Simon Rousseau, Gabriel Seyfarth, Georg Knebel +3
We report resistivity and Hall effect measurements in the chiral antiferromagnet EuPtSi. Depending on the magnetic field orientation with respect to the crystallographic axes, EuPt…
Incommensurate and commensurate antiferromagnetic orders in the kagome compound UVSn
Midori Amano Patino, Stephane Raymond, Georg Knebel +12
We report on the synthesis of single crystals of the kagome compound, UVSn, and present the results of magnetization, electrical resistivity, heat capacity, x-ray, and neut…
Slow magnetic quantum oscillations in the c-axis magnetoresistance of UTe
Freya Husstedt, Motoi Kimata, Sajal Naduvile Thadathil +8
Details of the electronic band structure in unconventional superconductors are key to the understanding of their fundamental ground state. The potential spin-triplet superconductor…
High Field Superconducting Phases of Ultra Clean Single Crystal UTe2
Dai Aoki, Ilya Sheikin, Nils Marquardt +3
We report the magnetoresistance of high-quality single crystals of UTe2 with Tc=2.1K in high magnetic fields up to 36T, with the field direction between the b and c-axes. From the…
Metamagnetism in the high-pressure tetragonal phase of UTe
T. Thebault, D. Braithwaite, G. Lapertot +3
A structural orthorhombic-to-tetragonal phase transition was recently discovered in the heavy-fermion compound UTe at a pressure ~GPa [Honda \textit{et al.}, J. P…
Incommensurate antiferromagnetism in UTe2 under pressure
W. Knafo, T. Thebault, P. Manuel +10
The discovery of multiple superconducting phases in UTe2 boosted research on correlated-electron physics. This heavy-fermion paramagnet was rapidly identified as a reference compou…
c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
G. Knebel, A. Pourret, S. Rousseau +9
The electrical resistivity of the unconventional superconductor UTe shows very anisotropic behavior in the normal state depending on the current direction. In the present paper…
de Haas-van Alphen Oscillations for the Field Along c-axis in UTe2
Dai Aoki, Ilya Sheikin, Alix McCollam +5
We performed de Haas-van Alphen (dHvA) experiments in the spin-triplet superconductor UTe2 for magnetic field along the c-axis above 15T. Three fundamental dHvA frequencies, named…
Fermi Surface and Lifshitz Transitions of a Ferromagnetic Superconductor under External Magnetic Fields
Roos Leenen, Dai Aoki, Georg Knebel +2
Lifshitz transitions are being increasingly recognised as significant in a wide variety of strongly correlated and topological materials, and understanding the origin and influence…
Quantum-well states at the surface of the heavy-fermion superconductor URuSi
Edwin Herrera-Vasco, Isabel Guillamón, Víctor Barrena +10
Electrons can form a two-dimensional electron gas at metal surfaces, where lateral confinement leads to quantum-well states. Such states have been observed for highly itinerant ele…
First Observation of de Haas-van Alphen Effect and Fermi Surfaces in Unconventional Superconductor UTe2
Dai Aoki, Hironori Sakai, Petr Opletal +11
We report the first observation of the de Haas-van Alphen (dHvA) effect in the novel spin-triplet superconductor UTe2 using high quality single crystals with the high residual resi…
Anisotropic signatures of the electronic correlations in the electrical resistivity of UTe
T. Thebault, W. Knafo, M. Vališka +5
Multiple unconventional superconducting phases are suspected to be driven by magnetic fluctuations in the heavy-fermion paramagnet UTe, and a challenge is to identify the signa…
Unconventional Superconductivity in UTe2
D. Aoki, J. -P. Brison, J. Flouquet +4
The novel spin-triplet superconductor candidate UTe2 was discovered only recently at the end of 2018 and attracted enormous attention. We review key experimental and theoretical pr…
Feedback of superconductivity on the magnetic excitation spectrum of UTe
S. Raymond, W. Knafo, G. Knebel +5
We investigate the spin dynamics in the superconducting phase of UTe by triple-axis inelastic neutron scattering on a single crystal sample. At the wave-vector =(0,…
Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe
W. Knafo, G. Knebel, P. Steffens +7
Inelastic-neutron-scattering measurements were performed on a single crystal of the heavy-fermion paramagnet UTe above its superconducting temperature. We confirm the presence…
Spin dynamics of the quantum dipolar magnet YbGaO in an external field
E. Lhotel, L. Mangin-Thro, E. Ressouche +7
We investigate ytterbium gallium garnet YbGaO in the paramagnetic phase above the supposed magnetic transition at mK. Our study combines suscept…
Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2
Dexin Li, Ai Nakamura, Fuminori Honda +8
We report the magnetic susceptibility and the magnetization under pressures up to 1.7GPa above the critical pressure, Pc ~ 1.5GPa, for H // a, b, c-axes in the novel spin triplet s…
Field-Induced Superconductivity near the Superconducting Critical Pressure in UTe2
Dai Aoki, Motoi Kimata, Yoshiki J. Sato +12
We report the magnetoresistance in the novel spin-triplet superconductor UTe2 under pressure close to the critical pressure Pc, where the superconducting phase terminates, for fiel…
Multiple Superconducting Phases and Unusual Enhancement of the Upper Critical Field in UTe2
Dai Aoki, Fuminori Honda, Georg Knebel +8
We performed AC calorimetry and magnetoresistance measurements under pressure for H || a-axis (easy-magnetization axis) in the novel heavy-fermion superconductor UTe2. Thanks to th…
Evidence of Fermi-Surface Reconstruction at the Metamagnetic Transition of the Strongly Correlated Superconductor UTe2
Qun Niu, Georg Knebel, Daniel Braithwaite +9
Thermoelectric power () and Hall effect () measurements on the paramagnetic superconductor UTe with magnetic field applied along the hard magnetization -axi…
Anisotropy of the Upper Critical Field in the Heavy-Fermion Superconductor UTe2 under Pressure
Georg Knebel, Motoi Kimata, Michal Vališka +12
We studied the anisotropy of the superconducting upper critical field in the heavy-fermion superconductor UTe under hydrostatic pressure by magnetoresistivity meas…