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Machida, Masahiko; Koyama, Tomio*
Physica C, 460-462(1), p.289 - 292, 2007/09
Times Cited Count:0 Percentile:0.00(Physics, Applied)no abstracts in English
Wakimoto, Shuichi; Yamada, Kazuyoshi*; Tranquada, J. M.*; Frost, C. D.*; Swainson, I.*; Birgeneau, R. J.*
Physica C, 460-462(1), p.166 - 169, 2007/09
Times Cited Count:1 Percentile:6.36(Physics, Applied)Spin excitations of overdoped LaSr
CuO
(
) have been studied by neutron scattering utilizing triple-axis and time-of-flight spectrometers. Low-energy excitation spectra (
meV) for all of the superconducting samples show a maximum around
meV with a maximum value of dynamic spin susceptibility
that decreases linearly with
as doping increases. The magnetic scattering cross section finally disappears at
, coincident with the disappearance of bulk superconductivity. Time-of-flight measurements for
and
shows markedly suppressed magnetic scattering intensities at intermediate energies (20
80
meV) in contrast to those of the stripe-ordered La
Ba
CuO
. These facts imply a cooperative correlation between the dynamic incommensurate state and the superconductivity.
Hashimoto, Makoto*; Tanaka, Kiyohisa*; Yoshida, Teppei*; Fujimori, Atsushi*; Okusawa, Makoto*; Wakimoto, Shuichi; Yamada, Kazuyoshi*; Kakeshita, Teruhisa*; Eisaki, Hiroshi*; Uchida, Shinichi*
Physica C, 460-462(2), p.884 - 885, 2007/09
Times Cited Count:3 Percentile:17.24(Physics, Applied)In the high- research, relationship between the pseudogap and the superconducting gap has been an important issue. We have performed a detailed temperature-dependent angle-integrated photoemission study of lightly-doped to heavily-overdoped La
Sr
CuO
and oxygen-doped La
CuO
. We found that, while the magnitude of the pseudogap increased with decreasing doping, that of the superconducting gap did not increase. This behavior can be explained if the superconducting gap opens only on the Fermi arc around the node (0,0)-(
,
) whereas the pseudogap opens primarily around (
,0).
Bonalde, I.*; Brmer-Escamilla, W.*; Haga, Yoshinori; Bauer, E.*; Yasuda, Takashi*; Onuki, Yoshichika
Physica C, 460-462(1), p.659 - 660, 2007/09
Times Cited Count:4 Percentile:21.95(Physics, Applied)Machida, Masahiko; Koyama, Tomio*; Ohashi, Yoji*
Physica C, 460-462(1), p.275 - 276, 2007/09
Times Cited Count:1 Percentile:6.36(Physics, Applied)no abstracts in English
Risdiana*; Adachi, Tadashi*; Oki, Naoki*; Yairi, Satoshi*; Tanabe, Yoichi*; Omori, Keisuke*; Suzuki, Takao*; Watanabe, Isao*; Koda, Akihiro*; Higemoto, Wataru; et al.
Physica C, 460-462(2), p.874 - 875, 2007/09
Times Cited Count:3 Percentile:17.24(Physics, Applied)Zero-field muon-spin-relaxation measurements have been carried out for LaSr
Cu
Zn
O
(LSCO)with
= 0-0.10 in the overdoped regime up to
= 0.30, in order to investigate whether the dynamical stripe correlations are pinned and stabilized even for the overdoped LSCO or not. It has been found that the Zn-induced slowing down of the Cu-spin fluctuations is weakened with increasing
but takes place in the overdoped regime and disappears at
= 0.30. This suggests that the stripe-pinning model holds good in the whole superconducting regime of LSCO and that there is no quantum critical point at
0.19.
Fujimori, Shinichi; Saito, Yuji; Okane, Tetsuo; Yamagami, Hiroshi; Fujimori, Atsushi*; Shimada, Kenya*; Namatame, Hirofumi*; Taniguchi, Masaki*; Aoki, Dai*; Ikeda, Shugo*; et al.
no journal, ,
no abstracts in English