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

doi:10.1103/PhysRevB.72.092506

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 journal › Article › peer-review

13 Scopus citations

Abstract

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 language	English
Article number	092506
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.72.092506
State	Published - 15 Sep 2005

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@article{2778e69dc1ef494e8abddd4b612323ce,

title = "Spatially resolved relaxation dynamics of photoinduced quasiparticles in underdoped YBa2Cu3O7-δ",

abstract = "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.",

author = "Chih-Wei Luo and Shih, {P. T.} and Chen, {Y. J.} and Chen, {M. H.} and Kaung-Hsiung Wu and Jenh-Yih Juang and Jiunn-Yuan Lin and Uen, {T. M.} and Gou, {Y. S.}",

year = "2005",

month = sep,

day = "15",

doi = "10.1103/PhysRevB.72.092506",

language = "English",

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issn = "2469-9950",

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TY - JOUR

T1 - Spatially resolved relaxation dynamics of photoinduced quasiparticles in underdoped YBa2Cu3O7-δ

AU - Luo, Chih-Wei

AU - Shih, P. T.

AU - Chen, Y. J.

AU - Chen, M. H.

AU - Wu, Kaung-Hsiung

AU - Juang, Jenh-Yih

AU - Lin, Jiunn-Yuan

AU - Uen, T. M.

AU - Gou, Y. S.

PY - 2005/9/15

Y1 - 2005/9/15

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=29644438248&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.72.092506

DO - 10.1103/PhysRevB.72.092506

M3 - Article

AN - SCOPUS:29644438248

SN - 2469-9950

VL - 72

JO - Physical Review B

JF - Physical Review B

IS - 9

M1 - 092506

ER -

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

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