Zobrazeno 1 - 10
of 469
pro vyhledávání: '"Nakajima Kenji"'
Autor:
Han, Lankun, Zeng, Zhenyuan, Liu, Bo, Kofu, Maiko, Nakajima, Kenji, Steffens, Paul, Hiess, Arno, Su, Yixi, Li, Shiliang
A Dirac quantum spin liquid hosts Dirac spinons, which are low-energy fractionalized neutral quasiparticles with spin 1/2 that obey the Dirac equation. Recent studies have revealed cone spin continuum in YCu$_3$(OD)$_6$Br$_2$[Br$_{x}$(OD)$_{1-x}$], c
Externí odkaz:
http://arxiv.org/abs/2411.09883
Autor:
Kawamata, Masahiro, Pang, Xiaoqi, Murakawa, Hiroshi, Ohira-Kawamura, Seiko, Nakajima, Kenji, Masuda, Hidetoshi, Fujita, Masaki, Hanasaki, Noriaki, Onose, Yoshinori, Nambu, Yusuke
Magnetic excitations in the noncentrosymmetric magnet Sr$_2$MnSi$_2$O$_7$ were investigated through inelastic neutron scattering measurements. Major magnetic excitations are limited up to the energy transfer of 0.5 meV, and two magnon branches under
Externí odkaz:
http://arxiv.org/abs/2410.22741
Publikováno v:
EPJ Web of Conferences, Vol 272, p 02012 (2022)
The polychromatic incident energy measurements using chopper spectrometers at pulsed sources enables us to measure dynamics with different energy resolutions, i.e., different time-windows with a single-measurement. By increasing the possible time-win
Externí odkaz:
https://doaj.org/article/9b3a223881684a479afbc551c4238a7e
Autor:
Zeng, Zhenyuan, Zhou, Chengkang, Zhou, Honglin, Han, Lankun, Chi, Runze, Li, Kuo, Kofu, Maiko, Nakajima, Kenji, Wei, Yuan, Zhang, Wenliang, Mazzone, Daniel G., Meng, Zi Yang, Li, Shiliang
Publikováno v:
Nat. Phys. (2024)
Emergent quasiparticles with a Dirac dispersion in condensed matter systems can be described by the Dirac equation for relativistic electrons, in analogy with Dirac particles in high-energy physics. For example, electrons with a Dirac dispersion have
Externí odkaz:
http://arxiv.org/abs/2310.11646
Autor:
Kim, Chaebin, Kim, Sujin, Park, Pyeongjae, Kim, Taehun, Jeong, Jaehong, Ohira-Kawamura, Seiko, Murai, Naoki, Nakajima, Kenji, Chernyshev, A. L., Mourigal, Martin, Kim, Sung-Jin, Park, Je-Geun
The Kitaev model, a honeycomb network of spins with bond-dependent anisotropic interactions, is a rare example of having a quantum spin liquid ground state. Although most Kitaev model candidate materials eventually order magnetically due to inevitabl
Externí odkaz:
http://arxiv.org/abs/2304.13236
Autor:
Gao, Bin, Chen, Tong, Yan, Han, Duan, Chunruo, Huang, Chien-Lung, Yao, Xu Ping, Ye, Feng, Balz, Christian, Stewart, J. Ross, Nakajima, Kenji, Ohira-Kawamura, Seiko, Xu, Guangyong, Xu, Xianghan, Cheong, Sang-Wook, Morosan, Emilia, Nevidomskyy, Andriy H., Chen, Gang, Dai, Pengcheng
Publikováno v:
Physical Review B 2022
Quantum spin liquid (QSL) is a disordered state of quantum-mechanically entangled spins commonly arising from frustrated magnetic dipolar interactions. However, QSL in some pyrochlore magnets can also come from frustrated magnetic octupolar interacti
Externí odkaz:
http://arxiv.org/abs/2209.04590
We report the neutron scattering results on magnetic orderings and excitations in $\mathrm{Ba}_2\mathrm{CoTeO}_6$ composed of two almost isolated subsystems A and B, which are described as an $S\,{=}\,1/2$ triangular Heisenberg-like antiferromagnet a
Externí odkaz:
http://arxiv.org/abs/2111.09558
Autor:
Okuma, Ryutaro, Kofu, Maiko, Asai, Shinichiro, Avdeev, Maxim, Koda, Akihiro, Okabe, Hirotaka, Hiraishi, Masatoshi, Takeshita, Soshi, Kojima, Kenji M., Kadono, Ryosuke, Masuda, Takatsugu, Nakajima, Kenji, Hiroi, Zenji
Publikováno v:
Nature Communications 12, 4382 (2021)
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 tunable property in geometrically frustrated spin systems. Here, we study t
Externí odkaz:
http://arxiv.org/abs/2107.08735
Autor:
Luo, Peng, Zhai, Yanqin, Falus, Peter, Sakai, Victoria Garcia, Hartl, Monika, Kofu, Maiko, Nakajima, Kenji, Faraone, Antonio, Zhang, Yang
Employing wide-angle neutron spin echo spectroscopy, we measured the Q-dependent coherent intermediate scattering function of the prototypical ionic glass former Ca0.4K0.6(NO3)1.4, in the equilibrium and supercooled liquid states beyond the hydrodyna
Externí odkaz:
http://arxiv.org/abs/2106.04820
Autor:
Nakajima Kenji, Ohira-Kawamura Seiko, Kikuchi Tatsuya, Kajimoto Ryoichi, Takahashi Nobuaki, Nakamura Mitsutaka, Soyama Kazuhiko, Osakabe Toyotaka
Publikováno v:
EPJ Web of Conferences, Vol 83, p 03011 (2015)
We report the design of the beam-transport system (especially the vertical geometry) for a cold-neutron disk-chopper spectrometer AMATERAS at J-PARC. Based on the elliptical shape, which is one of the most effective geometries for a ballistic mirror,
Externí odkaz:
https://doaj.org/article/15abef2f9af847f5888cb8c2a3bc2542