Zobrazeno 1 - 10
of 191
pro vyhledávání: '"Kofu, M."'
Autor:
Li, X. Y., Nocera, A., Foyevtsova, K., Sawatzky, G. A., Oudah, M., Murai, N., Kofu, M., Matsuura, M., Tamatsukuri, H., Aronson, M. C.
Electronic correlations lead to heavy quasiparticles in three-dimensional metals, and their collapse can destabilize magnetic moments. It is an open question whether there is an analogous instability in one-dimensional (1D) systems, unanswered due to
Externí odkaz:
http://arxiv.org/abs/2409.02880
Autor:
Iida, K., Kofu, M., Suzuki, K., Murai, N., Ohira-Kawamura, S., Kajimoto, R., Inamura, Y., Ishikado, M., Hasegawa, S., Masuda, T., Yoshida, Y., Kakurai, K., Machida, K., Lee, S. -H.
Publikováno v:
J. Phys. Soc. Jpn. 89, 053702 (2020)
We investigated the low-energy incommensurate (IC) magnetic fluctuations in Sr$_2$RuO$_4$ by the high-resolution inelastic neutron scattering measurements and random phase approximation (RPA) calculations. We observed a spin resonance with energy of
Externí odkaz:
http://arxiv.org/abs/2004.03591
Autor:
Allenspach, S., Biffin, A., Stuhr, U., Tucker, G. S., Ohira-Kawamura, S., Kofu, M., Voneshen, D. J., Boehm, M., Normand, B., Laflorencie, N., Mila, F., Rüegg, Ch.
Publikováno v:
Phys. Rev. Lett. 124, 177205 (2020)
The dimerized quantum magnet BaCuSi$_2$O$_6$ was proposed as an example of "dimensional reduction" arising near the magnetic-field-induced quantum critical point (QCP) due to perfect geometrical frustration of its inter-bilayer interactions. We demon
Externí odkaz:
http://arxiv.org/abs/1911.04161
Spin crossover is expected to enrich unusual physical states in various types of condensed matter. Through inelastic neutron scattering, we study the spin-state excitations in the canonical and advanced platform, LaCoO$_3$, and reveal that the spatia
Externí odkaz:
http://arxiv.org/abs/1808.05888
Autor:
Tomiyasu, K., Ito, N., Okazaki, R., Takahashi, Y., Onodera, M., Iwasa, K., Nojima, T., Aoyama, T., Ohgushi, K., Ishikawa, Y., Kamiyama, T., Ohira-Kawamura, S., Kofu, M, Ishihara, S.
Spin-state transition, also known as spin crossover, plays a key role in diverse systems, including minerals and biological materials. In theory, the boundary range between the low- and high-spin states is expected to enrich the transition and give r
Externí odkaz:
http://arxiv.org/abs/1712.09169
Publikováno v:
In Journal of Non-Crystalline Solids 15 August 2019 518:18-23
We investigate the imaginary part of the wave vector dependent dynamic spin susceptibility in Sr$_2$(Ru$_{0.99}$Ti$_{0.01}$)O$_4$ as a function of temperature using neutron scattering. At T=5 K, two-dimensional incommensurate (IC) magnetic fluctuatio
Externí odkaz:
http://arxiv.org/abs/1202.3654
Autor:
Iida, K., Kofu, M., Katayama, N., Lee, J., Kajimoto, R., Inamura, Y., Nakamura, M., Arai, M., Yoshida, Y., Fujita, M., Yamada, K., Lee, S. -H.
By performing time-of-flight neutron scattering measurements on a large amount of single crystals of Sr$_2$RuO$_4$, we studied detailed structure of the imaginary part of the dynamic spin susceptibility over a wide range of phase space. In the normal
Externí odkaz:
http://arxiv.org/abs/1105.3352
We have studied the magnetic excitations in impurity doped La$_{1.85}$Sr$_{0.15}$Cu$_{1-y}$A$_{y}$O$_{4}$ (A=Ni or Zn) by neutron scattering. The dispersion for Zn:$y=0.017$ is similar to that for the impurity free sample: incommensurate peaks with t
Externí odkaz:
http://arxiv.org/abs/0907.2742
Autor:
Kofu, M., Ueda, H., Nojiri, H., Oshima, Y., Zenmoto, T., Rule, K., Gerischer, S., Lake, B., Batista, C. D., Ueda, Y., Lee, S. -H.
By using bulk magnetization, electron spin resonance (ESR), heat capacity, and neutron scattering techniques, we characterize the thermodynamic and quantum phase diagrams of Ba$_3$Cr$_2$O$_8$. Our ESR measurements indicate that the low field paramagn
Externí odkaz:
http://arxiv.org/abs/0902.4229