@article{oai:nagoya.repo.nii.ac.jp:00005548,
 author = {Takeuchi, Tsunehiro and Kondo, Takeshi and Kitao, Takio and Kaga, Hiroyuki and Yang, Hongbo and Ding, Hong and Kaminski, Adam and Campuzano, Juan Carlos},
 journal = {Physical Review Letters},
 month = {Nov},
 note = {The hole-concentration (x) dependence of the three-dimensional energy-momentum dispersion in (Bi,Pb)_2(Sr,La)_2 CuO_6＋δ　has been investigated by angle-resolved photoemission spectroscopy. For a heavily overdoped sample of Tc≤0.5 K, an energy dispersion of ～10 meV in width is observed in the vicinity of the (π,0) point with varying momentum along the c axis (kz). This kz dispersion is zero for underdoped, optimally doped, and slightly overdoped samples up to a doping level corresponding to Tc＝22 K. At higher doping levels we observe significant dispersion of the order of 10 meV (sample with Tc≤0.5 K). This is clear evidence that at a doping value corresponding to Tc＝22 K, a crossover from two- to three-dimensional electronic structure occurs.},
 pages = {227004--227004},
 title = {Two- to Three-Dimensional Crossover in the Electronic Structure of (Bi,Pb)_2(Sr; La)_2 CuO_6＋δ　from Angle-Resolved Photoemission Spectroscopy},
 volume = {95},
 year = {2005}
}