Zobrazeno 1 - 10
of 1 209
pro vyhledávání: '"Toyota, N"'
We report high-resolution specific heat data on a high-quality single crystal of the classical superconductor V3Si, which reveal tiny lambda-shape anomalies appearing superimposed onto the BCS specific heat jump at the superconducting transition in m
Externí odkaz:
http://arxiv.org/abs/1409.8358
Autor:
Iwamoto, K., Mori, T., Kajitani, S., Matsumoto, H., Toyota, N., Suekuni, K., Avila, M. A., Saiga, Y., Takabatake, T.
We have investigated optical conductivity spectra of $n$- and $p$-type Ba$_8$Ga $_{16}$Sn$_{30}$ ($\alpha$-BGS) with type-VIII clathrate structure, at temperatures from 296\,K down to 6\,K with a terahertz time-domain spectrometer (0.2\,-\,2.5\,THz).
Externí odkaz:
http://arxiv.org/abs/1309.4524
Autor:
Iwamoto, K., Kushibiki, S., Honda, H., Kajitani, S., Mori, T., Matsumoto, H., Toyota, N., Suekuni, K., Avila, M. A., Takabatake, T.
The optical conductivity spectra of the rattling phonons in the clathrate Ba$_8$Ga$_{16}$Ge$_{30}$ are investigated in detail by use of the terahertz time-domain spectroscopy. The experiment has revealed that the lowest-lying vibrational mode of a Ba
Externí odkaz:
http://arxiv.org/abs/1206.0073
Autor:
Reibelt, M., Toyota, N.
The melting of the magnetic vortex lattice has been observed in high-Tc superconductors in many experiments by different groups and is regarded as confirmed. To date, only one group claims to have observed the vortex-lattice melting in the low-Tc sup
Externí odkaz:
http://arxiv.org/abs/1203.1848
Autor:
Reibelt, M., Toyota, N.
By the application of a small oscillating magnetic field parallel to the main magnetic field and perpendicular to the transport current, we were able to generate a voltage dip in the I-V curves of Nb$_3$Sn similar to the peak-effect pattern observed
Externí odkaz:
http://arxiv.org/abs/1110.4388
Autor:
Mori, T., Iwamoto, K., Kushibiki, S., Honda, H., Matsumoto, H., Toyota, N., Suekuni, K., Avila, M. A., Takabatake, T.
With a terahertz time-domain spectrometer (0.3 - 3.0 THz) we have measured the optical conductivity of the type-I clathrate Ba$_8$Ga$_{16}$Sn$_{30}$ at temperatures from 300 K down to 7 K. Independent six spectra superimposed on the Drude conductivit
Externí odkaz:
http://arxiv.org/abs/1007.4229
Autor:
Mori, T., Goshima, S., Iwamoto, K., Kushibiki, S., Matsumoto, H., Toyota, N., Suekuni, K., Avila, M. A., Takabatake, T., Hasegawa, T., Ogita, N., Udagawa, M.
A series of infrared-active optical phonons have been detected in type-I clathrate Ba$_8$Ga$_{16}$Ge$_{30}$ by terahertz time-domain spectroscopy. The conductivity spectra with the lowest-lying peaks at 1.15 and 1.80 THz are identified with so-called
Externí odkaz:
http://arxiv.org/abs/0905.3610
Publikováno v:
Phys. Rev. B vol 77, 174515 (2008)
New THz data on the optical conductivity of Pb are presented as well as a detailed Eliashberg analysis with particular emphasis on phonon-assisted processes not included in a BCS approach. Consideration of the optical self-energy instead of the condu
Externí odkaz:
http://arxiv.org/abs/0803.0974
Publikováno v:
J. Phys. Soc. Jpn. 76, 123701 (2007)
We report X-ray irradiation-induced carrier doping effects on the electrical conductivity in the organic dimer-Mott insulators $\kappa$-(ET)$_{2}$$X$ with $X =$ Cu[N(CN)$_{2}$]Cl and Cu$_{2}$(CN)$_{3}$. For $\kappa$-(ET)$_{2}$Cu[N(CN)$_{2}$]Cl, we ha
Externí odkaz:
http://arxiv.org/abs/0710.3005
Publikováno v:
Physical Review B 75, 094503 (2007)
We report a pronounced peak effect in the magnetization and the magnetocaloric coefficient in a single crystal of the superconductor Nb3Sn. As the origin of the magnetization peak effect in classical type-II superconductors is still strongly debated,
Externí odkaz:
http://arxiv.org/abs/cond-mat/0604176