Výsledky vyhledávání - "Takatsugu Masuda"

Akademický článek

Field control of quasiparticle decay in a quantum antiferromagnet

Autor: Shunsuke Hasegawa, Hodaka Kikuchi, Shinichiro Asai, Zijun Wei, Barry Winn, Gabriele Sala, Shinichi Itoh, Takatsugu Masuda

Publikováno v: Nature Communications, Vol 15, Iss 1, Pp 1-7 (2024)

Abstract Dynamics in a quantum material is described by quantized collective motion: a quasiparticle. The single-quasiparticle description is useful for a basic understanding of the system, whereas a phenomenon beyond the simple description such as q

Externí odkaz: https://doaj.org/article/fb88c09da7834ffdaaea3898e9722fe3

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Akademický článek

Field-induced quantum spin disordered state in spin-1/2 honeycomb magnet Na2Co2TeO6

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)

The honeycomb lattice with a spin-orbit interaction can give rise to exotic quantum states. With the measurements of bulk properties and inelastic neutron scattering, Lin et al demonstrate the existence of a field induced spin-disordered state in Na2

Externí odkaz: https://doaj.org/article/d51f3e50ba964431845575ab819dbb44

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Akademický článek

Triplon current generation in solids

Autor: Yao Chen, Masahiro Sato, Yifei Tang, Yuki Shiomi, Koichi Oyanagi, Takatsugu Masuda, Yusuke Nambu, Masaki Fujita, Eiji Saitoh

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)

Triplons are elementary spin excitations characteristic of dimerized magnets, carrying a spin angular momentum one. Here, the authors report evidence for spin current of triplons via thermal transport measurements in a spin-dimer compound CuGeO3.

Externí odkaz: https://doaj.org/article/250e07d5f00949bcad99f886499b14d2

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Akademický článek

Dimensional reduction by geometrical frustration in a cubic antiferromagnet composed of tetrahedral clusters

Autor: Ryutaro Okuma, Maiko Kofu, Shinichiro Asai, Maxim Avdeev, Akihiro Koda, Hirotaka Okabe, Masatoshi Hiraishi, Soshi Takeshita, Kenji M. Kojima, Ryosuke Kadono, Takatsugu Masuda, Kenji Nakajima, Zenji Hiroi

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)

Dimensionality reduction can occur in magnetically frustrated systems; however, it typically involves lattice distortions. Here, the authors report two- and one-dimensional character of spin correlations in a three-dimensional tetrahedral cluster ant

Externí odkaz: https://doaj.org/article/a779bbc01fc748dabdf2b74214302550

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Akademický článek

Gapless spin liquid in a square-kagome lattice antiferromagnet

Publikováno v: Nature Communications, Vol 11, Iss 1, Pp 1-7 (2020)

There exist many theoretical models of frustrated quantum magnetism, most of which lack convincing experimental realisations. Here the authors combine several experimental methods to argue that KCu6AlBiO4(SO4)5Cl behaves as a square-kagome-lattice qu

Externí odkaz: https://doaj.org/article/615c9db15fba4ee48f1b1c93a0788f42

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Akademický článek

Establishing the carrier scattering phase diagram for ZrNiSn-based half-Heusler thermoelectric materials

Autor: Qingyong Ren, Chenguang Fu, Qinyi Qiu, Shengnan Dai, Zheyuan Liu, Takatsugu Masuda, Shinichiro Asai, Masato Hagihala, Sanghyun Lee, Shuki Torri, Takashi Kamiyama, Lunhua He, Xin Tong, Claudia Felser, David J. Singh, Tiejun Zhu, Jiong Yang, Jie Ma

Publikováno v: Nature Communications, Vol 11, Iss 1, Pp 1-9 (2020)

Chemical doping plays an important role in tuning carrier concentration of materials, but its influence on other aspects of electrical properties is less known. Here, the authors find that chemical doping brings strong screening effects to ionized im

Externí odkaz: https://doaj.org/article/b1f94823652341c4b8d740f96d55b1f3

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Akademický článek

Nontrivial temperature dependence of magnetic anisotropy in multiferroic Ba_{2}MnGe_{2}O_{7}

Autor: Shunsuke Hasegawa, Shohei Hayashida, Shinichiro Asai, Masato Matsuura, Zaliznyak Igor, Takatsugu Masuda

Publikováno v: Physical Review Research, Vol 3, Iss 3, p L032023 (2021)

We measured the temperature dependences of the static magnetization and the spin excitation in the square-lattice multiferroic Ba_{2}MnGe_{2}O_{7}. An anisotropy gap of the observed low-energy mode is scaled by electric polarization rather than a pow

Externí odkaz: https://doaj.org/article/2973a2a5dd3d4ea28393f98821bce416

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