Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Ohara, Jun"'
Autor:
Yamamoto, Shoji, Ohara, Jun
Publikováno v:
J. Phys. Commun. Vol.7, No. 6, 065004 (2023)
We construct modified spin-wave thermodynamics for frustrated noncollinear antiferromagnets for the first time. The well-known modified spin-wave theory for collinear antiferromagnets diagonalizes a bosonic Hamiltonian subject to the constraint that
Externí odkaz:
http://arxiv.org/abs/2305.03958
Autor:
Ohara, Jun, Maeda, Yasuharu, Ogata, Noriyuki, Kuroki, Takanori, Misawa, Masashi, Kudo, Shin-ei, Nemoto, Tetsuo, Yamochi, Toshiko, Iacucci, Marietta
Publikováno v:
In Clinical Gastroenterology and Hepatology
Autor:
Ohara, Jun, Yamamoto, Shoji
Publikováno v:
J. Phys. Soc. Jpn., Vol.89, 093706 (2020)
Irradiating ${\rm Cu}_2{\rm Mo}({\rm CN})_8\cdot 8{\rm H}_2{\rm O}$ with blue light induces a global magnetization, whereas succeeding irradiations with red or longer-wavelength light demagnetize this material. We solve the time-dependent Schr\"oding
Externí odkaz:
http://arxiv.org/abs/2008.00411
Publikováno v:
Phys. Rev. B 86, 045137 (2013)
Photo-excited state in correlated electron system with spin-state degree of freedom is studied. We start from the two-orbital extended Hubbard model where energy difference between the two orbitals is introduced. Photo-excited metastable state is exa
Externí odkaz:
http://arxiv.org/abs/1204.1847
Publikováno v:
Phys. Rev. B 88, 085107 (2013)
Photoirradiation effects in correlated electrons coupled with localized spins are studied based on the extended double-exchange model. In particular, we examine melting of an antiferromagnetic (AFM) charge order insulating state by varying the light
Externí odkaz:
http://arxiv.org/abs/1204.1844
Publikováno v:
J. Phys. Soc. Jpn. 79, 044709 (2010)
Motivated by recent chemical attempts at assembling halogen-bridged transition-metal complexes within a nanotube, we model and characterize a platinum-halide triangular prism in terms of a Peierls-Hubbard Hamiltonian. Based on a group-theoretical arg
Externí odkaz:
http://arxiv.org/abs/1002.2681
Autor:
Ohara, Jun, Yamamoto, Shoji
Publikováno v:
Europhys. Lett. 87, 17006 (2009)
Motivated by iodo platinum complexes assembled within a quadratic-prism lattice, [Pt(C$_2$H$_8$N$_2$)(C$_{10}$H$_8$N$_2$)I]$_4$(NO$_3$)$_8$, we investigate the ground-state properties of a Peierls-Hubbard four-legged tube. Making a group-theoretical
Externí odkaz:
http://arxiv.org/abs/0907.4407
Autor:
Yamamoto, Shoji, Ohara, Jun
Publikováno v:
J. Phys.: Condens. Matter 20, 415215 (2008)
Nonlinear lattice relaxation of photoexcited diplatinum-halide chain compounds is theoretically investigated within a one-dimensional extended Peierls-Hubbard model. We first illuminate the whole relaxation scenario in terms of variational wave funct
Externí odkaz:
http://arxiv.org/abs/0809.4760
Autor:
Yamamoto, Shoji, Ohara, Jun
Publikováno v:
Phys. Rev. B 76, 235116 (2007)
New varieties of quasi-one-dimensional halogen (X)-bridged transition-metal (M) complexes, (C_8_H_6_N_4_)[Pt(C_2_H_8_N_2_)X]_2_X(ClO_4_)_3_\cdotH_2_O (X=Br,Cl) and (C_10_H_8_N_2_)[Pt(C_4_H_13_N_3_)Br]_2_Br_4_\cdot2H_2_O, comprising two-leg ladders of
Externí odkaz:
http://arxiv.org/abs/0711.1052
Autor:
Yamamoto, Shoji, Ohara, Jun
Publikováno v:
Phys. Rev. B 76, 014409 (2007)
Motivated by the homometallic intertwining double-chain ferrimagnets A_3_Cu_3_(PO_4_)_4_ (A=Ca,Sr,Pb), we investigate the low-energy structure of their model Hamiltonian H=\sum_n_[J_1_(S_{n :1}_+S_{n :3}_) +J_2_(S_{n+1:1}+S_{n-1:3}_)]\cdotS_{n:2}_, w
Externí odkaz:
http://arxiv.org/abs/0711.1051