Partial and macroscopic phase coherences in an underdoped Bi2Sr2CaCu2O8+δ thin film

H. Murakami, T. Kiwa, N. Kida, M. Tonouchi, T. Uchiyama, I. Iguchi, Z. Wang

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Abstract

A combined study using the time-resolved pump-probe technique and the time domain terahertz transmission spectroscopy has been carried out to investigate the normal-state anomalies in underdoped Bi2Sr2CaCu2O8+δ. It was observed that a superconducting gap and a pseudogap coexist in the superconducting state. The pseudogap locally evolves below T* ≃ 210 K simultaneously with the appearance of partial phase coherence with a short lifetime less than 1 ps. With decreasing temperature, the domains with a pseudogap developed and saturated at TS ∼ 95 K, and the frequency-dependent superconductivity fluctuation appeared as cooperative phenomena among the partial phase-coherent domains. These experimental data show that the development of the partial coherent local domains with a pseudogap has an important role to switch from the partial to the macroscopic phase-coherent state.

Original languageEnglish
Pages (from-to)288-294
Number of pages7
JournalEurophysics Letters
Volume60
Issue number2
DOIs
Publication statusPublished - Oct 1 2002
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Murakami, H., Kiwa, T., Kida, N., Tonouchi, M., Uchiyama, T., Iguchi, I., & Wang, Z. (2002). Partial and macroscopic phase coherences in an underdoped Bi2Sr2CaCu2O8+δ thin film. Europhysics Letters, 60(2), 288-294. https://doi.org/10.1209/epl/i2002-00349-x