Development of ultrahigh-resolution photoemission spectrometer and study of quasiparticles in high-temperature superconductors

超高分辨率光电子能谱仪研制及高温超导准粒子研究

基本信息

批准号：
14102006
负责人：
TAKAHASHI Takashi
金额：
$ 69.97万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (S)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

项目摘要

In order to clarify the origin of quasiparticles in high-temperature superconductors, we have constructed a new ultrahigh-resolution angle-resolved photoemission (ARPES) spectrometer at Tohoku University. The spectrometer consists of (1) electron-energy analyzer, (2) light source, (3) analysis chamber, and (4) sample preparation chamber. As for the analyzer, we have improved the electric stability of the hemispherical part and the electron lens system, and also performed accurate sensitivity calibration of the CCD camera and the two-dimensional photoelectron detector. As for the light source, we have constructed a double differential pumping system as well as a VUV-filter which can pass ultraviolet-ray from the He discharge lamp but completely blocks residual gasses from the lamp. As for the sample chamber, we have developed a variable-angle manipulator which can rotate the angle with respect to the analyzer at low temperature. To effectively perform the ARPES experiment, we have devel … More oped a sample transfer system around the sample preparation chamber. To improve the vacuum during the measurement and to achieve low temperature, we have constructed multi-wall radiation shields with He-cycling cryostat. By making these efforts, we have finally achieved high performances as follows : (1) energy resolution : 1.3meV, (2) momentum resolution : 0.005Å^<-1>, (3) lowest temperature : 3.7K, and (4) vacuum during measurements : 2x10^<-11>Torr. By using this ultrahigh-resolution spectrometer, we have performed high-resolution ARPES measurements on following subjects.1)Observation of Fermi surface, superconducting gap, and pseudogap in Bi-based high-temperature superconductors.2)Direct observation of Bogoliubov quasiparticles on a triple-layered superconductor Bi2223.3)Elucidation of the origin of kink in the dispersion in hole-doped high-temperature superconductors.4)Direct observation of multiple-superconducting gaps in MgB_2.5)Observation of magnetic isotope effect in energy dispersion of Bi-based high-temperature superconductors.6)Direct observation of nonmonotonic d_x2_<-y2> wave superconducting gap in electron-doped high-temperature superconductors. Less

为了阐明高温超导体中准粒子的起源，我们在Toohoku University构建了新的超高分辨率角度分辨光发射（ARPES）光谱仪。光谱仪由（1）电子能源分析仪，（2）光源，（3）分析室和（4）样品制备室。至于分析仪，我们提高了半球部分和电子晶状体系统的电稳定性，并且还对CCD摄像头和二维光电探测器进行了准确的灵敏度校准。至于光源，我们已经构建了一个双差分泵系统以及一个可以从HE放电灯中传递紫外线射线的VUV滤波器，但完全阻止了灯中的残留气体。至于样品室，我们已经开发了一个可变角度操纵器，该操作器可以在低温下相对于分析仪旋转角度。为了有效地执行ARPES实验，我们有了Devel…更多地是在样品制备室周围的样品转移系统。为了在测量过程中改善真空并达到低温，我们已经用He-Cycling Ceryostat构建了多壁辐射罩。通过做出这些努力，我们最终达到了高表现，如下所示：（1）能量分辨率：1.3mev，（2）动量分辨率：0.005Å^<-1>，（3）最低温度：3.7K和（4）测量过程中的真空：2x10^<-11> Torr。 By using this ultrahigh-resolution spectrometer, we have performed high-resolution ARPES measurements on following subjects.1) Observation of Fermi surface, superconducting gap, and pseudogap in Bi-based high-temperature superconductors.2) Direct observation of Bogoliubov quasiparticles on a triple-layered superconductor Bi2223.3) Elucidation of the origin of kink in the Dispersion in hole-doped high-temperature superconductors.4)Direct observation of multiple-superconducting gaps in MgB_2.5)Observation of magnetic isotope effect in energy dispersion of Bi-based high-temperature superconductors.6)Direct observation of nonmonotonic d_x2_<-y2> wave superconducting gap in electron-doped high-temperature superconductors.较少的

项目成果

期刊论文数量（147）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Momentum anisotropy of the scattering rate in cuprate superconductors

DOI：
10.1103/physrevb.71.014517
发表时间：
2004-04
期刊：
Physical Review B
影响因子：
3.7
作者：
A. Kaminski;H. Fretwell;H. Fretwell;M. Norman;M. Randeria;S. Rosenkranz;U. Chatterjee;U. Chatterjee;J. Campuzano;J. Campuzano;J. Mésot;Takafumi Sato;Takashi Takahashi;T. Terashima;M. Takano;K. Kadowaki;Z. Li;H. Raffy
通讯作者：
A. Kaminski;H. Fretwell;H. Fretwell;M. Norman;M. Randeria;S. Rosenkranz;U. Chatterjee;U. Chatterjee;J. Campuzano;J. Campuzano;J. Mésot;Takafumi Sato;Takashi Takahashi;T. Terashima;M. Takano;K. Kadowaki;Z. Li;H. Raffy

Direct observation of non-monotonic d_x2_<-y>2-wave superconducting gap in the electron-doped high-T_c superconductor Pr_<0.89>LaCe_<0.11>CuO_4

电子掺杂高温超导体Pr_<0.89>LaCe_<0.11>CuO_4中非单调d_x2_<-y>2波超导能隙的直接观测

DOI：
发表时间：
2005
期刊：
Physical Review Letters 95
影响因子：
0
作者：
K. Terashima;et. al.;N.Nakayama et al.;T.Arakane et al.;T.Sato et al.;S.Raj et al.;T.Sato et al.;H.Matsui et al.;K.Nakayama et al.;T.Arakane et al.;K.Nakayama et al.;Y.X.Xiao et al.;T.Arakane et al.;S.Raj et al.;N.Nakayama et al.;A.Kanigel et al.;K.Terashima et al.;K.Sugawara et al.;K.Sugawara et al.;K.Terashima et al.;H.Matsui et al.;T.Sato et al.;H.-B.Yang et al.;H.Matsui et al.;T.Takahashi et al.;S.Raj et al.;S.Raj et al.;T.Sato et al.;T.Sato et al.;T.Sato et al.;H.Matsui et al.
通讯作者：
H.Matsui et al.

K.Terashima: "Charge-density-wave transition of 1T-VSe_2 studied by angle-resolved photoemission spectroscopy"Physical Review B. 68. 155108-1-155108-8 (2003)

K.Terashima：“通过角分辨光电子能谱研究的 1T-VSe_2 的电荷-密度-波跃迁”物理评论 B. 68. 155108-1-155108-8 (2003)