Spatial dichotomy of quasiparticle dynamics in underdoped thin-film YBa2 Cu3 O7-δ superconductors

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

doi:10.1103/PhysRevB.74.184525

Spatial dichotomy of quasiparticle dynamics in underdoped thin-film YBa2 Cu3 O7-δ superconductors

Chih-Wei Luo^*, C. C. Hsieh, Y. J. Chen, P. T. Shih, 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

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Abstract

By the spatial-temporal-resolved femtosecond spectroscopy on well-textured (110)- and (100)-YBCO thin films, two distinctly temperature-dependent characteristics of quasiparticle relaxation in the nodal and antinodal directions are clearly identified. One temperature dependence associated with a high-energy gap has been observed along the ab diagonal for the whole hole-doping region and along the b axis except near optimal doping, while the other temperature dependence related to the opening of the superconducting gap appears along b axis regardless of the hole concentration. This spatial dichotomy between the nodal and antinodal quasiparticle dynamics and the evolution of gap symmetry with hole doping are discussed for enlightenment on the nature of the phase diagram of hole-doped cuprates. These strongly suggest that the two characteristics may have different physical origins and compete with each other.

Original language	English
Article number	184525
Number of pages	5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	74
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.74.184525
State	Published - 22 Nov 2006

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title = "Spatial dichotomy of quasiparticle dynamics in underdoped thin-film YBa2 Cu3 O7-δ superconductors",

abstract = "By the spatial-temporal-resolved femtosecond spectroscopy on well-textured (110)- and (100)-YBCO thin films, two distinctly temperature-dependent characteristics of quasiparticle relaxation in the nodal and antinodal directions are clearly identified. One temperature dependence associated with a high-energy gap has been observed along the ab diagonal for the whole hole-doping region and along the b axis except near optimal doping, while the other temperature dependence related to the opening of the superconducting gap appears along b axis regardless of the hole concentration. This spatial dichotomy between the nodal and antinodal quasiparticle dynamics and the evolution of gap symmetry with hole doping are discussed for enlightenment on the nature of the phase diagram of hole-doped cuprates. These strongly suggest that the two characteristics may have different physical origins and compete with each other.",

author = "Chih-Wei Luo and Hsieh, {C. C.} and Chen, {Y. J.} and Shih, {P. T.} 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 = "2006",

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doi = "10.1103/PhysRevB.74.184525",

language = "English",

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T1 - Spatial dichotomy of quasiparticle dynamics in underdoped thin-film YBa2 Cu3 O7-δ superconductors

AU - Luo, Chih-Wei

AU - Hsieh, C. C.

AU - Chen, Y. J.

AU - Shih, P. T.

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 - 2006/11/22

Y1 - 2006/11/22

N2 - By the spatial-temporal-resolved femtosecond spectroscopy on well-textured (110)- and (100)-YBCO thin films, two distinctly temperature-dependent characteristics of quasiparticle relaxation in the nodal and antinodal directions are clearly identified. One temperature dependence associated with a high-energy gap has been observed along the ab diagonal for the whole hole-doping region and along the b axis except near optimal doping, while the other temperature dependence related to the opening of the superconducting gap appears along b axis regardless of the hole concentration. This spatial dichotomy between the nodal and antinodal quasiparticle dynamics and the evolution of gap symmetry with hole doping are discussed for enlightenment on the nature of the phase diagram of hole-doped cuprates. These strongly suggest that the two characteristics may have different physical origins and compete with each other.

AB - By the spatial-temporal-resolved femtosecond spectroscopy on well-textured (110)- and (100)-YBCO thin films, two distinctly temperature-dependent characteristics of quasiparticle relaxation in the nodal and antinodal directions are clearly identified. One temperature dependence associated with a high-energy gap has been observed along the ab diagonal for the whole hole-doping region and along the b axis except near optimal doping, while the other temperature dependence related to the opening of the superconducting gap appears along b axis regardless of the hole concentration. This spatial dichotomy between the nodal and antinodal quasiparticle dynamics and the evolution of gap symmetry with hole doping are discussed for enlightenment on the nature of the phase diagram of hole-doped cuprates. These strongly suggest that the two characteristics may have different physical origins and compete with each other.

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DO - 10.1103/PhysRevB.74.184525

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JO - Physical Review B

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ER -

Spatial dichotomy of quasiparticle dynamics in underdoped thin-film YBa2 Cu3 O7-δ superconductors

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