Zobrazeno 1 - 10
of 437
pro vyhledávání: '"Nishizaki S"'
We apply a novel analysis of the field and angle dependence of the quantum-oscillatory amplitudes in the unconventional superconductor Sr2RuO4 to map its Fermi surface in unprecedented detail, and to obtain previously inaccessible information on the
Externí odkaz:
http://arxiv.org/abs/cond-mat/9909027
Autor:
Bergemann, C., Julian, S. R., Mackenzie, A. P., Tyler, A. W., Farrell, D. E., Maeno, Y., NishiZaki, S.
Sr2RuO4 is the only known layered perovskite oxide superconductor without copper; there is strong evidence for an unconventional ("p-wave") pairing mechanism, and it has recently been shown to possess a cylindrical, "quasi-two-dimensional" Fermi surf
Externí odkaz:
http://arxiv.org/abs/cond-mat/9811364
Publikováno v:
Phys.Rev. E57 (1998) 4016
The mechanism of collectivity coexisting with chaos in a finite system of strongly interacting fermions is investigated. The complex spectra are represented in the basis of two-particle two-hole states describing the nuclear double-charge exchange mo
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9712010
Autor:
Nishizaki, S., Wambach, J.
Publikováno v:
Phys.Rev.C57:1515-1517,1998
Double-dipole excitations in ^{208}Pb are analyzed within a microscopic model explicitly treating 2p2h-excitations. Collective states built from such 2p2h-excitations are shown to appear at about twice the energy of the isovector giant dipole resonan
Externí odkaz:
http://arxiv.org/abs/nucl-th/9703059
The mechanism of collectivity coexisting with chaos is investigated on the quantum level. The complex spectra are represented in the basis of two-particle two-hole states describing the nuclear double-charge exchange modes in $^{48}$Ca. An example of
Externí odkaz:
http://arxiv.org/abs/nucl-th/9703039
Autor:
Nishizaki, S., Wambach, J.
The double-dipole strength distribution in $^{40}$Ca is calculated microscopically within a model space of 1p1h - and 2p2h excitations. Anharmonic effects in the centroid energies of the $0^+$- and $2^+$ components are found to be small, in agreement
Externí odkaz:
http://arxiv.org/abs/nucl-th/9412008
Publikováno v:
Phys.Rev.Lett. 74 (1995) 1075-1078
The rate of phase-space exploration in the decay of isovector and isoscalar giant quadrupole resonances in $^{40}$Ca is analyzed. The study is based on the time dependence of the survival probability and of the spectrum of generalized entropies evalu
Externí odkaz:
http://arxiv.org/abs/nucl-th/9407015
Publikováno v:
Phys.Rev.Lett.72:2839-2842,1994
The influence of background states with increasing level of complexity on the strength distribution of the isoscalar and isovector giant quadrupole resonance in $^{40}$Ca is studied. It is found that the background characteristics, typical for chaoti
Externí odkaz:
http://arxiv.org/abs/nucl-th/9312020
A statistical analysis of the spectrum of two particle - two hole doorway states in a finite nucleus is performed. On the unperturbed mean-field level sizable attractive correlations are present in such a spectrum. Including particle-hole rescatterin
Externí odkaz:
http://arxiv.org/abs/nucl-th/9302011
Autor:
Schropp, R.E.I., Nishizaki, S., Houweling, Z.S., Verlaan, V., van der Werf, C.H.M., Matsumura, H.
Publikováno v:
In Solid State Electronics 2008 52(3):427-431
