Pseudogap Phase Boundary in Overdoped Bi_2Sr_2CaCu_2O_8 Studied by Measuring Out-of-plane Resistivity under the Magnetic Fields

Autor:	Murata, Kousuke, Kushibiki, Haruki, Watanabe, Takao, Kudo, Kazutaka, Nishizaki, Terukazu, Kobayashi, Norio, Yamada, Kazuyoshi, Noji, Takashi, Koike, Yoji
Rok vydání:	2010
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
DOI:	10.1016/j.physc.2010.01.027
Popis:	The characteristic pseudogap temperature T* in Bi2Sr2CaCu2O8 system has been systematically evaluated as a function of doping, especially focusing on its overdoped region, by measuring the out-of-plane resistivity under the magnetic fields. Overdoped samples have been prepared by annealing TSFZ-grown Bi2Sr2CaCu2O8 single crystals under the high oxygen pressures (990 kgf/cm2). At a zero field, the out-of-plane resistivity showed a metallic behavior down to Tc (= 62 K), while under the magnetic fields of over 3 T,it showed typical upturn behavior from around 65 K upon decreasing temperature. This result suggests that the pseudogap and superconductivity are different phenomena. Comment: 2 pages, 2 figures. Final version accepted for the Proceedings of the M2S-IX Conference (Tokyo, September 2009)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1002.3014 Zobrazit plný text záznamu View this record from Arxiv