6 papers
Fermi-liquid behavior and characteristic temperature-dependent susceptibility in clean RuO crystal
Shubhankar Paul, Atsutoshi Ikeda, Hisakazu Matsuki +6
The magnetic nature of the altermagnet candidate RuO remains under debate. It has been recently shown from quantum oscillations and angle-resolved photoemission spectroscopy (A…
Muon Knight shift as a precise probe of the superconducting symmetry of SrRuO
Hisakazu Matsuki, Rustem Khasanov, Jonas A. Krieger +8
Muon spin rotation (SR) measurements of internal magnetic field shifts, known as the muon Knight shift, is used for determining pairing symmetries in superconductors. While thi…
Electronic state of superconductivity in line nodal material CaSb2 under pressure up to 4.2 GPa
Shumpei Oguchi, Kenji Ishida, Atsutoshi Ikeda +2
We report the results of resistance measurements under pressure up to on single-crystalline , which shows the maximum of superconducting trans…
Direct evidence for the absence of coupling between shear strain and superconductivity in Sr2RuO4
Giordano Mattoni, Thomas Johnson, Atsutoshi Ikeda +4
The superconducting symmetry of Sr2RuO4 has been intensely debated for many years. A crucial controversy recently emerged between shear-mode ultrasound experiments, which suggest a…
Growth of ultra-clean single crystals of RuO2
Shubhankar Paul, Giordano Mattoni, Hisakazu Matsuki +4
We report the details of the growth of ultra-clean single crystals for RuO2, a candidate material for altermagnetism. By using a crystal-growth tube with a necking structure and pr…
Subtle Structural Anomaly under Compression in Line-Nodal CaSb
Hidemitsu Takahashi, Atsutoshi Ikeda, Shunsaku Kitagawa +5
We report X-ray diffraction patterns and calculated electronic band structures of the Dirac line-nodal material CaSb under pressure. Its superconducting transition temperature…