Coexistence of the Pseudogap and the Superconducting Gap Revealed by the \textit{c}-axis Optical Study of YBa$_{2}$(Cu$_{1-x}$Zn$_{x}$)$_{3}$O$_{7-δ}$

Ece Uykur; Kiyohisa Tanaka; Takahiko Masui; Shigeki Miyasaka; Setsuko Tajima

doi:10.7566/JPSJ.82.033701

paper

Coexistence of the Pseudogap and the Superconducting Gap Revealed by the \textit{c}-axis Optical Study of YBa $_{2}$ (Cu $_{1 - x}$ Zn $_{x}$ ) $_{3}$ O $_{7 - δ}$

arXiv:1301.6436 · doi:10.7566/JPSJ.82.033701

Abstract

To address the issue of the pseudogap in the superconducting state of the high temperature superconducting cuprates, we studied the temperature dependent redistribution of the spectral weight in the \textit{c}-axis polarized optical spectra for underdoped YBa $_{2}$ (Cu $_{1 - x}$ Zn $_{x}$ ) $_{3}$ O $_{7 - δ}$ single crystals with $x = 0, 0.007,$ 0.012, and 0.04. It was found that for Zn substituted samples, the spectral weight transfer to the high energy region, which characterizes the pseudogap state, continues even below the superconducting transition temperature (\textit{T} $_{c}$ ), indicating the coexistence of the pseudogap and the superconducting gap. Moreover, the observation of the pseudogap in the Zn-doped non-superconducting sample gives evidence that the pseudogap is not a precursor of superconductivity.

10 pages, 4 figures, accepted to JPSJ

References in corpus (1)

Direct observation of the coexistence of pseudogap and superconducting quasi-particles in Bi2212 by time-resolved optical spectroscopy

Coexistence of the Pseudogap and the Superconducting Gap Revealed by the \textit{c}-axis Optical Study of YBa2​(Cu1−x​Znx​)3​O7−δ​

Abstract

References in corpus (1)

Cited by in corpus (3)

Coexistence of the Pseudogap and the Superconducting Gap Revealed by the \textit{c}-axis Optical Study of YBa $_{2}$ (Cu $_{1 - x}$ Zn $_{x}$ ) $_{3}$ O $_{7 - δ}$