| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
|
|
タイトル |
Electron-phonon interaction in La2-xSrxCuO4 investigated by Raman scattering |
|
言語 |
en |
| 作成者 |
Nimori, Shigeki
Sakita, Shigenobu
Nakamura, Fumihiko
Fujita, Toshizo
Hata, Hiroaki
Ogita, Norio
Udagawa, Masayuki
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
|
|
権利情報 |
Copyright (c) 2000 American Physical Society. |
| 内容記述 |
|
|
内容記述 |
Using high-quality single crystals of La2-xSrxCuO4, Roman scattering spectra in the (c,c) geometry have been investigated in different Sr concentrations (x=0,0.1,0.113,0,15,0.22) and in the wide temperature region. It has been found that the apical oxygen vibration along the c axis shows the following anomalous behaviors in the dependences of the Sr concentration and temperature. With the increase of the Sr concentration, the peak intensity abruptly decreases from x=0 to 0.1 and its line shape becomes asymmetric. In the temperature dependence, its energy is almost constant or slightly decreases with decreasing temperature, and also its intensity decreases above 100 K universally in the doped samples. In addition, the background intensities increase with increasing x, except for x=0.113 at 6 K, where "1/8 problem" occurs. This increase shows that the background response is caused by an electronic excitation because the magnetic one is forbidden in the (c,c) spectra. The decrease of the background at x=0.113 at 6 K is understood by the formation of charge density wave. The asymmetric line shapes of the apical oxygen vibration are well explained by the Fano model, which is based on the interference effect between the phonon and electronic excitations. Furthermore, the abrupt decrease of the intensity from x=0 to 0.1 is also explained by the introduction of the electron-phonon interaction. The correlation between the obtained electron-phonon interaction and Tc has been found in the Sr-concentration dependence. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
American Physical Society |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1103/PhysRevB.62.4142 |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
http://dx.doi.org/10.1103/PhysRevB.63.140510 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
1098-0121 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA11187113 |
| 開始ページ |
|
|
開始ページ |
4142 |
| 書誌情報 |
Physical Review B - Condensed Matter and Materials Physics
Physical Review B - Condensed Matter and Materials Physics
巻 62,
号 6,
p. 4142-4147,
発行日 2000-08-01
|
| 旧ID |
18781 |
PhysRevB_62_4142.pdf (101.8 KB)
