529 citations · 2.3k across the 27 of their papers we have counts for
16 papers · 1 filter
Twofold spontaneous symmetry breaking in a heavy fermion superconductor UPt
Y. Machida, A. Itoh, Y. So +7
The field-orientation dependent thermal conductivity of the heavy-fermion superconductor UPt was measured down to very low temperatures and under magnetic fields throughout thr…
Enhanced quasiparticle heat conduction of the multigap superconductor Lu2Fe3Si5
Y. Machida, S. Sakai, K. Izawa +2
The thermal transport measurements have been made on the Fe-based superconductor Lu2Fe3Si5 (Tc ~ 6 K) down to a very low temperature Tc/120. The field and temperature dependences o…
Superconducting and Structural Transitions in the β-Pyrochlore Oxide KOs2O6 under High Pressure
Hiroki Ogusu, Nao Takeshita, Koichi Izawa +5
Rattling-induced superconductivity in the β-pyrochlore oxide KOs2O6 is investigated under high pressure up to 5 GPa. Resistivity measurements in a high-quality single crystal revea…
Nodal Structure of Unconventional Superconductors Probed by the Angle Resolved Thermal Transport Measurements
Y. Matsuda, K. Izawa, I. Vekhter
Over the past two decades, unconventional superconductivity with gap symmetry other than s-wave has been found in several classes of materials, including heavy fermion (HF), high-T…
Anomalous quasiparticle transport in the superconducting state of CeCoIn5
Y. Kasahara, Y. Nakajima, K. Izawa +5
We report on a study of thermal Hall conductivity k_xy in the superconducting state of CeCoIn_5. The scaling relation and the density of states of the delocalized quasiparticles, b…
Field-angle resolved specific heat and thermal conductivity in the vortex phase of UPd_2Al_3
P. Thalmeier, T. Watanabe, K. Izawa +1
The field-angle dependent specific heat and thermal conductivity in the vortex phase of UPd_2Al_3 is studied using the Doppler shift approximation for the low energy quasiparticle…
Triplet superconductivity in the skutterudite PrOs_4Sb_12
Kazumi Maki, Stephan Haas, David Parker +3
There is mounting evidence for triplet superconductivity in the recently discovered skutterudite compound PrOs_4Sb_12. In this work, we propose nodal order parameters for the A- an…
Superconducting Gap Function in Antiferromagnetic Heavy-Fermion UPd_2Al_3 Probed by Angle Resolved Magnetothermal Transport Measurements
T. Watanabe, K. Izawa, Y. Kasahara +5
The superconducting gap structure of heavy fermion UPd_2Al_3, in which unconventional superconductivity coexists with antiferromagnetic (AF) order with atomic size local moments, w…
New High Field State of Flux Line Lattice in Unconventional Superconductor CeCoIn_5
T. Watanabe, Y. Kasahara, K. Izawa +7
Ultrasound velocity measurements of the unconventional superconductor CeCoIn_5 with extremely large Pauli paramagnetic susceptibility reveal an unusual structural transformation of…
Normal-state Hall Angle and Magnetoresistance in quasi-2D Heavy Fermion CeCoIn_5 near a Quantum Critical Point
Y. Nakajima, K. Izawa, Y. Matsuda +6
The normal-state Hall effect and magnetoresisitance (MR) have been measured in the quasi-2D heavy fermion superconductor CeCoIn_5. In the non-Fermi liquid region where the reistivi…
Multiphase Superconductivity in Skutterudite PrOs_4Sb_12
K. Maki, H. Won, P. Thalmeier +3
We propose a model of nodal order parameters for the superconducting A and B - phase of skutterudite PrOs_4Sb_{12} and discuss the associated angular dependent magnetothermal condu…
Multiple Superconducting Phases in New Heavy Fermion Superconductor PrOs4Sb12
K. Izawa, Y. Nakajima, J. Goryo +6
The superconducting gap structure of recently discovered heavy fermion superconductor PrOs4Sb12 was investigated by using thermal transport measurements in magnetic field rotated r…
Free flux flow resistivity in strongly overdoped high-T_c cuprate; purely viscous motion of the vortices in semiclassical d-wave superconductor
Y. Matsuda, A. Shibata, K. Izawa +3
We report the free flux flow (FFF) resistivity associated with a purely viscous motion of the vortices in moderately clean d-wave superconductor Bi:2201 in the strongly overdoped r…
Gap Function with Point Nodes in Borocarbide Superconductor YNi_2B_2C
K. Izawa, K. Kamata, Y. Nakajima +6
To determine the superconducting gap function of a borocarbide superconductor YNi_2B_2C, the c-axis thermal conductivity kappa_zz was measured in a magnetic field rotated in variou…
Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn_5
K. Izawa, H. Yamaguchi, Yuji Matsuda +3
The thermal conductivity of the heavy-fermion superconductor CeCoIn_5 has been studied in a magnetic field rotating within the 2D planes. A clear fourfold symmetry of the thermal c…
Low Energy Quasiparticle Excitation in the Vortex State of Borocarbide Superconductor YNi_2B_2C
K. Izawa, A. Shibata, Yuji Matsuda +5
We have measured the low temperature heat capacity Cp and microwave surface impedance Zs in the vortex state of YNi_2B_2C. In contrast to conventional s-wave superconductors, Cp sh…