Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Otsuki, J. A."'
Compton scattering is a well-established technique that can provide detailed information about electronic states in solids. Making use of the principle of tomography, it is possible to determine the Fermi surface from sets of Compton-scattering data
Externí odkaz:
http://arxiv.org/abs/2210.07701
Publikováno v:
Phys. Rev. B 110, 035104 (2024)
Magnetic and multipolar ordering in f electron systems takes place at low temperatures of order 1--10 Kelvin. Combinations of first-principles with many-body calculations for such low-energy properties of correlated materials are challenging problems
Externí odkaz:
http://arxiv.org/abs/2209.10429
Autor:
Weh, A., Otsuki, J., Schnait, H., Evertz, H. G., Eckern, U., Lichtenstein, A. I., Chioncel, L.
Publikováno v:
Phys. Rev. Research 2, 043263 (2020)
In this work, we investigate models for bulk, bi- and multilayers containing half-metallic ferromagnets (HMFs), at zero and at finite temperature, in order to elucidate the effects of strong electronic correlations on the spectral properties (density
Externí odkaz:
http://arxiv.org/abs/2007.02804
Autor:
Krien, F., van Loon, E. G. C. P., Hafermann, H., Otsuki, J., Katsnelson, M. I., Lichtenstein, A. I.
Publikováno v:
Phys. Rev. B 96, 075155 (2017)
Extensions of dynamical-mean-field-theory (DMFT) make use of quantum impurity models as non-perturbative and exactly solvable reference systems which are essential to treat the strong electronic correlations. Through the introduction of retarded inte
Externí odkaz:
http://arxiv.org/abs/1706.10233
Continuous-Time Quantum Monte Carlo (CT-QMC) method combined with Dynamical Mean Field Theory (DMFT) is used to calculate both Periodic Anderson Model (PAM) and Kondo Lattice Model (KLM). Different parameter sets of both models are connected by the S
Externí odkaz:
http://arxiv.org/abs/1212.5867
Publikováno v:
J. Phys. Soc. Jpn. 79 (2010) 114709
The Kondo lattice model with substitutional disorder is studied with attention to the size of the Fermi surface and the associated Dingle temperature. The model serves for understanding heavy-fermion Ce compounds alloyed with La according to substitu
Externí odkaz:
http://arxiv.org/abs/1008.0159
Akademický článek
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Publikováno v:
J. Phys. Soc. Jpn. 76 (2007) 114707
An impurity solver based on a continuous-time quantum Monte Carlo method is developed for the Coqblin-Schrieffer model. The Monte Carlo simulation does not encounter a sign problem for antiferromagnetic interactions, and accurately reproduces the Kon
Externí odkaz:
http://arxiv.org/abs/0708.0718
Publikováno v:
J. Magn. Magn. Mater. 310 (2007) 425
The effective mass probed by the de Haas-van Alphen oscillations is studied for a model Ce system under magnetic field higher than the Kondo energy. In the mean-field theory, the mass enhancement per Ce ion in the periodic system is identical with th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0608382
Autor:
Otsuki, J., Kuramoto, Y.
Publikováno v:
J. Phys. Soc. Jpn. 75 (2006) 064707
The non-crossing approximation (NCA) is generalized for the Anderson model with finite Coulomb repulsion U. Resummation of infinite number of terms is performed so as to incorporate all leading contributions in the limit of large degeneracy of the lo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0602584