Angle-resolved photoemission study of the lightly doped cuprates Bi2212

✍ Scribed by K. Tanaka; T. Yoshida; A. Fujimori; D.H. Lu; X.-J. Zhou; Z.-X. Shen; Z. Hussain; H. Eisaki; S. Uchida; T. Sugaya; T. Mizuno; I. Terasaki

• Book ID: 103883362
• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 248 KB
• Volume: 351
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2004.06.025

✦ Synopsis

Insulating and underdoped Bi 2Àz Pb z Sr 2 Ca 1Àx R x Cu 2 O 8þy ðR ¼ Pr; ErÞ (Bi2212) has been studied by photoemission spectroscopy and compared with La 2Àx Sr x CuO 4 (LSCO). The lower-Hubbard band of the insulating Bi2212 shows a stronger dispersion along the underlying Fermi surface than that of undoped La 2 CuO 4 : The flat band at kBðp; 0Þ is found to be deeper in Bi2212 than in LSCO. These observations suggest that the magnitude of the next-nearestneighbor hopping jt 0 j of the single-band model is larger in Bi2212 than in LSCO.