92 citations · 513 across the 24 of their papers we have counts for
26 papers
Complex Magnetic Behavior of the Ce sawtooth chains in CeRhSn
P. Opletal, J. Fikáček, E. Duverger-Nédellec +8
Conflicting reports exist on the ground state of the intermetallic compound CeRhSn. This can be rooted in the sawtooth-like arrangement of two inequivalent Ce sites in the unit…
Reinforcement of superconductivity by quantum critical fluctuations of metamagnetism in UTe
Y. Tokiwa, . P. Opletal, H. Sakai +8
The normal-conducting state of the superconductor UTe is studied by entropy analysis for magnetic fields along the -axis, obtained from magnetization using the relation $(\p…
Longitudinal spin fluctuations driving field-reinforced superconductivity in UTe
Yo Tokunaga, Hironori Sakai, Shinsaku Kambe +10
Our measurements of Te NMR relaxations reveal an enhancement of electronic spin fluctuations above T, leading to their divergence in the vicinity of the meta…
Dramatic elastic response at the critical end point in UTe
Michal Vališka, Tetiana Haidamak, Andrej Cabala +10
The first-order transition line in the \textit{H-T} phase diagram of itinerant electron metamagnets terminates at the critical end point-analogous to the critical point on the gas-…
Fully gapped pairing state in spin-triplet superconductor UTe
S. Suetsugu, M. Shimomura, M. Kamimura +14
Spin-triplet superconductors provide an ideal platform for realizing topological superconductivity with emergent Majorana quasiparticles. The promising candidate is the recently di…
Anomalous vortex dynamics in spin-triplet superconductor UTe
Y. Tokiwa, H. Sakai. S. Kambe, P. Opletal +7
The vortex dynamics in the spin-triplet superconductor, UTe, are studied by measuring the DC electrical resistivity with currents along the -axis under magnetic fields along…
Quasi-2D Fermi surface in the anomalous superconductor UTe2
A. G. Eaton, T. I. Weinberger, N. J. M. Popiel +16
The heavy fermion paramagnet UTe exhibits numerous characteristics of spin-triplet superconductivity. Efforts to understand the microscopic details of this exotic superconducti…
Anisotropic Enhancement of Lower Critical Field in Ultraclean Crystals of Spin-Triplet Superconductor UTe2
K. Ishihara, M. Kobayashi, K. Imamura +7
The paramagnetic spin-triplet superconductor UTe has attracted significant attention because of its exotic superconducting properties including an extremely high upper critical…
Ferromagnetic Crossover within the Ferromagnetic Order of UTe
Petr Opletal, Hironori Sakai, Yoshinori Haga +4
We investigate the physical properties of a single crystal of uranium telluride UTe. We have confirmed that UTe crystallizes in the hexagonal structure wi…
Self-reconstruction of order parameter in spin-triplet superconductor UTe
Y. Tokiwa, P. Opletal, H. Sakai +10
We investigate the effect of easy-axis metamagnetic crossover on superconductivity in UTe along the -axis through measurements of AC susceptibility, magnetization, and the m…
Field Induced Multiple Superconducting Phases in UTe2 along Hard Magnetic Axis
H. Sakai, Y. Tokiwa, P. Opletal +7
The superconducting (SC) phase diagram in uranium ditelluride is explored under magnetic fields () along the hard magnetic b-axis using a high-quality single crystal with $T_{\r…
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…
Slow Electronic Dynamics in the Paramagnetic State of UTe
Yo Tokunaga, Hironori Sakai, Shinsaku Kambe +13
Te NMR experiments in field () applied along the easy magnetization axis (the -axis) revealed slow electronic dynamics developing in the paramagnetic state of UTe…
Effect of uranium deficiency on normal and superconducting properties in unconventional superconductor UTe
Y. Haga, P. Opletal, Y. Tokiwa +4
Single crystals of the unconventional superconductor UTe have been grown in various conditions which result in different superconducting transition temperature as well as norma…
Chiral superconductivity in UTe2 probed by anisotropic low-energy excitations
K. Ishihara, M. Roppongi, M. Kobayashi +5
Chiral spin-triplet superconductivity is a topologically nontrivial pairing state with broken time-reversal symmetry, which can host Majorana quasiparticles. The recently discovere…
Pressure-induced huge increase of Curie temperature of the van der Waals ferromagnet VI3
J. Valenta, M. Kratochvílová, M. Míšek +12
Evolution of magnetism in single crystals of the van der Waals compound VI3 in external pressure up to 7.3 GPa studied by measuring magnetization and ac magnetic susceptibility is…
Different universality classes of isostructural U compounds ( = Rh, Co, CoRu; = Ga, Al)
Petr Opletal, Vladimír Sechovský, Jan Prokleška
Magnetization isotherms of the 5f-electron ferromagnets URhGa, UCoGa and UCo0.98Ru0.02Al were measured at temperatures in the vicinity of their Curie temperature in order to invest…
Localization of 5f-electrons and pressure effects on magnetism in U intermetallics in the light of spin-fluctuation theory
Petr Opletal, Jaroslav Valenta, Petr Proschek +2
UCoGa and URhGa, two isostructural compounds show opposite signs of the initial response of Curie temperature to applied hydrostatic premenssure. To determine the physical origin o…
Extreme narrow magnetic domain walls in U ferromagnets: The UCoGa case
Petr Opletal, Klára Uhlířová, Ivo Kalabis +2
Surface magnetic domains of a UCoGa single crystal during magnetization/demagnetization processes in increasing/decreasing magnetic fields were investigated by means of magnetic-fo…
Effect of thermal history on magnetism in UCoGa
Petr Opletal, Petr Proschek, Barbora Vondráčková +3
Single crystals of UCoGa have been grown in different conditions and subsequently annealed in order to provide a collection of samples representing various quality as to concentrat…
Pressure Evolution of Magnetism in URhGa
Martin Míšek, Petr Opletal, Vladimír Sechovský +4
In this paper, we report the results of an ambient and high pressure study of a 5f-electron ferromagnet URhGa. The work is focused on measurements of magnetic and thermodynamic pro…
Antiferromagnetism and phase transitions in non-centrosymmetric UIrSi
Jaroslav Valenta, Fuminori Honda, Michal Vališka +7
Magnetization and specific heat measurements on a UIrSi3 single crystal reveal Ising-like antiferromagnetism below T = 41.7 K with easy magnetization direction along the c-axis…
Electrical resistivity across the tricriticality in itinerant ferromagnet
Petr Opletal, Jan Prokleška, Jaroslav Valenta +1
We investigate the discontinuous ferromagnetic phase diagram near tricritical point in UCo 1-x Ru x Al compounds by electrical resistivity measurements. Separation of phases in UCo…
Pressure-induced quantum phase transition in the itinerant ferromagnet UCoGa
Martin Míšek, Jan Prokleška, Petr Opletal +4
In this paper, we report the results of a high pressure study of the itinerant 5f-electron ferromagnet UCoGa. The work is focused on probing the expected ferromagnet-to-paramagnet…