Yoshiya Uwatoko

Pressure-Induced Interplay between Heavy-Fermion and Mn-Derived Magnetic States in CeMnSi

Sae Nishiyama, Haruka Mima, Jun-ichi Hayashi, Keiki Takeda et autres

We investigated pressure effects on the nontrivial heavy-fermion antiferromagnet CeMnSi by means of electrical resistivity (ρ) and powder X-ray diffraction. With increasing pressure, the antiferromagnetic order of Mn (T N ∼ 240 K at ambient pressure) is rapidly suppressed and disappears at …

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Superconductivity under pressure in a van der Waals heavy-fermion metal

Tong Shi, Wenhao Li, Qingxin Dong, Pengtao Yang et autres

High-pressure tuning of distinct superconducting states associated with structural instability in β -ThRhGe

Gen Li, Pengtao Yang, Guorui Xiao, Chenglin Li et autres

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Zr-based bulk metallic glass clamp cell for high-pressure inelastic neutron scattering

Shohei Hayashida, Takeshi Wada, M. Ishikado, Koji Munakata et autres

We report the fabrication and characterization of a Zr-based bulk metallic glass (Zr-BMG) clamp cell designed for high-pressure inelastic neutron scattering (INS) measurements. The INS spectra of the empty cell exhibit broad and featureless backgrounds, reflecting the amorphous structure of the Zr-BMG. …

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Structural transition and possible pressure-induced superconductivity in a suboxide La 5 Pb 3 O

Jiaqiang Yan, David J. Singh, Bayrammurad Saparov, Huibo Cao et autres

Here we report a structural phase transition and its interplay with superconductivity in the suboxide ${\mathrm{La}}_{5}{\mathrm{Pb}}_{3}\mathrm{O}$. Upon cooling through ${T}_{t}=225\phantom{\rule{0.28em}{0ex}}\mathrm{K},{\mathrm{La}}_{5}{\mathrm{Pb}}_{3}\mathrm{O}$ transforms from a high-temperature $I4$/mcm to a low-temperature $P4$/ncc structure in which La-Pb dimerization along the $c$ axis occurs. This transition is …

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Metallization and Pressure-Induced Superconductivity in Carrier Doped Excitonic Insulator (Ta1−xTix)2NiSe5

Shun Tsuchida, Yusuke Hirose, Takuya Sekikawa, Yoshiaki Ōno et autres

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Probing superconducting ground states in VEC-optimized Hf–Ta–Nb–Mo–W high entropy alloys

Cao Wang, Yoshiya Uwatoko, Qiang Jing

Abstract Structural characterization, along with detailed analysis of the superconducting and normal-state properties, was performed on Hf–Ta–Nb–Mo–W high entropy alloys (HEAs) with an optimized valence electron concentration (VEC) of ∼4.85. The results demonstrate that, despite their intrinsic chemical complexity, these HEAs maintain …

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Hydrostatic pressure effects on superconducting properties of the noncentrosymmetric high-entropy alloy (HfNb) 0.10 (MoRuRe)0.90

Sathiskumar Mariappan, Dilip Bhoi, Thiagarajan Maran, Kapil Motla et autres

Abstract We investigate the effects of hydrostatic pressure on the superconducting properties of a noncentrosymmetric high-entropy alloy (HEA) (HfNb)0.10(MoRuRe)0.90. Temperature-dependent resistivity (ρ(T)) and magnetization measurements were performed under pressures to assess variations in the superconducting transition temperature (T c), upper and lower …

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Pressure-induced nearly perfect rectangular lattice and superconductivity in the organic molecular crystal (DMET-TTF) 2 AuBr 2

Taiga Kato, Hanming Ma, Kazuyoshi Yoshimi, Takahiro Misawa et autres

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Quasiparticle interaction originating from Bogoliubov Fermi surfaces under pressure in 18%-S substituted FeSe studied via NMR

Zhongyu Yu, Xiaoling Shen, Koya Nakamura, Kazuya Inomata et autres

Abstract S-substituted FeSe superconductors in the tetragonal phase display several unique features among iron-based superconductors, particularly the presence of zero-energy excitations in the superconducting (SC) state. The recent concept of Bogoliubov Fermi surfaces (BFSs)—a theoretical model describing ultranodal states—has attracted considerable interest. …

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Author response for "Probing superconducting ground states in VEC-optimized Hf-Ta-Nb-Mo-W high entropy alloys"

Meng Jiao, Cao Wang, Yoshiya Uwatoko, Qiang Jing

Evolution of structural dependent superconducting properties on Re-Os-W-Mo-Ta high entropy alloys

Jiaojiao Meng, Bai-Zhuo Li, Yanming Ma, Cao Wang et autres

Abstract Structural, superconducting ground state, and normal state properties on Re-Os-W-Mo-Ta high-entropy alloys (HEAs) were investigated using powder x-ray diffraction, magnetization measurements, electrical resistivity analysis, and specific heat measurements. The structural phase transformation was found to develop through compositional variations of the …

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