Evolution of a pairing-induced pseudogap from the superconducting gap of (Bi,Pb)2Sr2CuO6

Autor:	Nakayama, K., Sato, T., Sekiba, Y., Terashima, K., Richard, P., Takahashi, T., Kudo, K., Okumura, N., Sasaki, T., Kobayashi, N.
Rok vydání:	2009
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.102.227006
Popis:	We have performed an ultrahigh-resolution angle-resolved photoemission spectroscopy study of slightly-overdoped (Bi,Pb)2Sr2CuO6 to elucidate the origin of pseudogap. By using a newly developed xenon-plasma light source, we determined the comprehensive momentum and temperature dependences of the superconducting gap and the pseudogap. We found that the antinodal pseudogap persists far above the superconducting transition temperature and is smoothly connected to the nodal gap. The characteristic temperature of the pseudogap scales well with the superconducting-gap size irrespective of the momentum location. The present experimental results point to the pairing origin of the pseudogap. Comment: 4 pages, 3 figures, to appear in PRL
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0904.4079 Zobrazit plný text záznamu View this record from Arxiv