Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Tanaka, Yasumoto"'
Publikováno v:
Physics Letters A382, 3483 (2018)
We investigated quantized modes of kinks in the phase space of superconducting gaps in a superconductor with multiple gaps. The kink is described by the sine-Gordon model in a two-gap superconductor and by the double sine-Gordon model in a three-gap
Externí odkaz:
http://arxiv.org/abs/1811.00802
Publikováno v:
In Physica C: Superconductivity and its applications 15 October 2021 589
Autor:
Yanagisawa, Takashi, Tanaka, Yasumoto
Publikováno v:
New Journal of Physics 16 (2014) 123014
We present a new mechanism of fluctuation-induced Nambu-Goldstone bosons in a scalar field theory of Higgs-Josephson systems. We consider a simple scalar field model with $U(1)^n$ rotational symmetry. When there is an interaction which violates the r
Externí odkaz:
http://arxiv.org/abs/1411.0214
Multi-phase physics is a new physics of multi-gap superconductors. Multi-band superconductors exhibit many interesting and novel properties. We investigate the dynamics of the phase-difference mode and show that this mode yields a new excitation mode
Externí odkaz:
http://arxiv.org/abs/1310.1674
Publikováno v:
Journal of the Physical Society of Japan 81 (2012) 024712
We investigate several important properties of multi-band superconductors. They are time-reversal symmetry breaking, chirality and fractional quantum flux vortices in three-band superconductors. The BCS (Bardeen-Cooper-Schrieffer) gap equation has a
Externí odkaz:
http://arxiv.org/abs/1202.5400
Autor:
Yanagisawa, Takashi, Odagiri, Kosuke, Hase, Izumi, Yamaji, Kunihiko, Shirage, Parasharam M., Tanaka, Yasumoto, Iyo, Akira, Eisaki, Hiroshi
Publikováno v:
Journal of the Physical Society of Japan 79 (2010) 126002
The Comment insists on the following: in our model it is assumed that the effective interactions have specific energy ranges within the single band with a cutoff at \omega_1 for the phononic part and a range from \omega_1 to \omega_2 in the AF channe
Externí odkaz:
http://arxiv.org/abs/1104.2146
Autor:
Shirage, Parasharam M., Miyazawa, Kiichi, Kihou, Kunihiro, Lee, Chul-Ho, Kito, Hijiri, Tokiwa, Kazuyasu, Tanaka, Yasumoto, Eisaki, Hiroshi, Iyo, Akira
Here we demonstrate the technique to stabilize the ErFeAsO-based superconductor with the smallest lattice constants in LnFeAsO1-y (Ln = lanthanide) series using hydrogen doping method. Polycrystalline samples were synthesized by heating pellets with
Externí odkaz:
http://arxiv.org/abs/1011.5022
Autor:
Shirage, Parasharam M., Miyazawa, Kiichi, Kihou, Kunihiro, Kito, Hijiri, Yoshida, Yoshiyuki, Tanaka, Yasumoto, Eisaki, Hiroshi, Iyo, Akira
Publikováno v:
Phys. Rev. Lett. 105, 037004 (2010)
We report the iron (Fe) isotope effect on the transition temperature (Tc) in the oxygen-deficient SmFeAsO_{1-y}, a 50 K-class Fe-based superconductor. For the optimally-doped samples with Tc = 54 K, change of the Fe average atomic mass (MFe) causes a
Externí odkaz:
http://arxiv.org/abs/1007.2666
Autor:
Shirage, Parasharam M., Kihou, Kunihiro, Miyazawa, Kiichi, Lee, Chul-Ho, Kito, Hijiri, Eisaki, Hiroshi, Yanagisawa, Takashi, Tanaka, Yasumoto, Iyo, Akira
Publikováno v:
PHYSICAL REVIEW LETTERS (PRL) 103, 257003 (2009)
We report that (Ba,K)Fe2As2 superconductor (a transition temperature, Tc = 38 K) shows inverse Iron isotope effect (-0.18) (the sample including the larger atomic weight of Fe depicts higher Tc). Measurements of both temperature dependent magnetizati
Externí odkaz:
http://arxiv.org/abs/0903.3515
Akademický článek
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