Spatially resolved relaxation dynamics of photoinduced quasiparticles in underdoped YBa2Cu3O7-δ

Chih-Wei Luo*, P. T. Shih, Y. J. Chen, M. H. Chen, Kaung-Hsiung Wu, Jenh-Yih Juang, Jiunn-Yuan Lin, T. M. Uen, Y. S. Gou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


The spatially resolved relaxation characteristics of photoinduced quasiparticles (QPs) in CuO2 planes of underdoped YBCO are disclosed by polarized fs time-resolved spectroscopy. The relaxation time (τ) along b axis diverges at Tc, and appears to be governed by a temperature-dependent gap Δ(T) at T<Tc. Furthermore, for T>Tc, a monotonic increase of τ with decreasing T along the b axis and ab diagonal was observed and can be attributed to a temperature-independent gap Δp. The results lend support to the recombination dominant scenario of QP dynamics. However, the QP thermalization may take part along the nodal direction in the highly underdoped samples.

Original languageEnglish
Article number092506
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number9
StatePublished - 15 Sep 2005


Dive into the research topics of 'Spatially resolved relaxation dynamics of photoinduced quasiparticles in underdoped YBa2Cu3O7-δ'. Together they form a unique fingerprint.

Cite this