74 citations · 223 across the 10 of their papers we have counts for
10 papers
Highly fluctuating double- magnetic order in the van der Waals metal CeTe
Ryutaro Okuma, Yuita Fujisawa, Natsumi Maekawa +5
CeTe is a van der Waals antiferromagnet composed of magnetic [CeTe] layers coupled to highly conducting Te square nets. Its simple quasi-two-dimensional electronic…
Topological Semimetal KAlGe with Novel Electronic Instability
Toshiya Ikenobe, Takahiro Yamada, Jun-ichi Yamaura +6
Compounds with the anti-PbFCl structure exhibit a variety of electronic instabilities and intriguing physical properties. NaAlSi and NaAlGe are similar topological nodal-line semim…
Dimensional reduction by geometrical frustration in a cubic antiferromagnet composed of tetrahedral clusters
Ryutaro Okuma, Maiko Kofu, Shinichiro Asai +10
Dimensionality is a critical factor in determining the properties of solids and is an apparent built-in character of the crystal structure. However, it can be an emergent and tunab…
Universal scaling of the specific heat in quantum kagome antiferromagnet herbertsmithite
H. Murayama, T. Tominaga, T. Asaba +9
Despite tremendous investigations, a quantum spin liquid state realized in spin-1/2 kagome Heisenberg antiferromagnet remains largely elusive. In herbertsmithite ZnCu(OH)Cl…
Magnetization Plateau Observed by Ultra-High Field Faraday Rotation in a Kagomé Antiferromagnet Herbertsmithite
Ryutaro Okuma, Daisuke Nakamura, Shojiro Takeyama
To capture the high-field magnetization process of herbertsmithite (ZnCu3(OH)6Cl2), Faraday rotation (FR) measurements were carried out on a single crystal in magnetic fields of up…
Fermionic Order by Disorder in a van der Waals Antiferromagnet
R. Okuma, D. Ueta, S. Kuniyoshi +11
CeTe3 is a unique platform to investigate the itinerant magnetism in a van der Waals (vdW) coupled metal. Despite chemical pressure being a promising route to boost quantum fluctua…
Thermal Hall Effects of Spins and Phonons in Kagome Antiferromagnet Cd-Kapellasite
Masatoshi Akazawa, Masaaki Shimozawa, Shunichiro Kittaka +7
We have investigated the thermal-transport properties of the kagome antiferromagnet Cd-kapellasite (Cd-K). We find that a field suppression effect on the longitudinal thermal condu…
A series of magnon crystals appearing under ultrahigh magnetic fields in a kagomé antiferromagnet
R. Okuma, D. Nakamura, T. Okubo +7
Search for a new quantum state of matter emerging in a crystal is one of recent trends in condensed matter physics. For magnetic materials, geometrical frustration and high magneti…
Frustrated Magnetism of Pharmacosiderite Comprising Tetrahedral Clusters Arranged in the Primitive Cubic Lattice
Ryutaro Okuma, Takeshi Yajima, Tatsuo Fujii +2
We show that pharmacosiderite is a novel cluster antiferromagnet comprising frustrated regular tetrahedra made of spin-5/2 Fe3+ ions that are arranged in the primitive cubic lattic…
Weak ferromagnetic order breaking the threefold rotational symmetry of the underlying kagomé lattice in CdCu(OH)(NO)HO
Ryutaro Okuma, Takeshi Yajima, Daisuke Nishio-Hamane +2
Novel magnetic phases are expected to occur in highly frustrated spin systems. Here we study the structurally perfect kagomé antiferromagnet CdCu(OH)(NO)HO…