Spin excitation in d-wave superconductors

A Fermi liquid picture

Khee Kyun Voo, Hong-Yi Chen, Wen-Chin Wu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A detailed study of the inelastic neutron scattering (INS) spectra of the high-Tc cuprates based on the Fermi liquid (FL) picture is given. We focus on the issue of the transformation between the commensurate and incommensurate (IC) excitation driven by frequency or temperature. For La2-xSrxCuO4 (LSCO), the condition of small Δ(0)/vF can simultaneously reproduce the always existing IC peaks in the superconducting (SC) and normal states, and the always fixed location at temperature or frequency change. For YBa2Cu3O6+x (YBCO), a moderate Δ(0)/vF and proximity of the van Hove singularity (vHS) at M=(0,π) to the Fermi level can reproduce the frequency- and temperature-driven shifting IC peaks in the SC state, and the vanishing of the IC peak in the normal state. We address the conditional peak shifting behavior to a refined consideration on the nesting effect which is previously overlook. As a result, both the well documented data on LSCO and the recent data on YBCO (on YBa2Cu3O6.7 by [Phys. Rev. Lett 83 (1999) 608] and YBa2Cu3O6.85 by [Science 288 (2000) 1234]) can be reasonably reconciled within a FL picture. We also point out that the one-dimensional-like data by [Condmat/9811100; Nature 404 (2000) 729] on a detwinned and more underdoped sample YBa2Cu3O6.6 could be due to a gap anisotropy effect originally discussed by [Phys. Rev. B 53 (1996) 5889], and we proceed to suggest a way of clarifying it.

Original languageEnglish
Pages (from-to)323-336
Number of pages14
JournalPhysica C: Superconductivity and its applications
Volume382
Issue number2-3
DOIs
Publication statusPublished - 2002 Nov 1

Fingerprint

Fermi liquids
Superconducting materials
excitation
Inelastic neutron scattering
Fermi level
Temperature
Anisotropy
trucks
cuprates
temperature
proximity
inelastic scattering
neutron scattering
anisotropy

Keywords

  • High-T superconductivity
  • Magnetic property
  • Neutron scattering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Spin excitation in d-wave superconductors : A Fermi liquid picture. / Voo, Khee Kyun; Chen, Hong-Yi; Wu, Wen-Chin.

In: Physica C: Superconductivity and its applications, Vol. 382, No. 2-3, 01.11.2002, p. 323-336.

Research output: Contribution to journalArticle

@article{7a2ba3cbad1c4f3a9bb31364d5f1bdbb,
title = "Spin excitation in d-wave superconductors: A Fermi liquid picture",
abstract = "A detailed study of the inelastic neutron scattering (INS) spectra of the high-Tc cuprates based on the Fermi liquid (FL) picture is given. We focus on the issue of the transformation between the commensurate and incommensurate (IC) excitation driven by frequency or temperature. For La2-xSrxCuO4 (LSCO), the condition of small Δ(0)/vF can simultaneously reproduce the always existing IC peaks in the superconducting (SC) and normal states, and the always fixed location at temperature or frequency change. For YBa2Cu3O6+x (YBCO), a moderate Δ(0)/vF and proximity of the van Hove singularity (vHS) at M=(0,π) to the Fermi level can reproduce the frequency- and temperature-driven shifting IC peaks in the SC state, and the vanishing of the IC peak in the normal state. We address the conditional peak shifting behavior to a refined consideration on the nesting effect which is previously overlook. As a result, both the well documented data on LSCO and the recent data on YBCO (on YBa2Cu3O6.7 by [Phys. Rev. Lett 83 (1999) 608] and YBa2Cu3O6.85 by [Science 288 (2000) 1234]) can be reasonably reconciled within a FL picture. We also point out that the one-dimensional-like data by [Condmat/9811100; Nature 404 (2000) 729] on a detwinned and more underdoped sample YBa2Cu3O6.6 could be due to a gap anisotropy effect originally discussed by [Phys. Rev. B 53 (1996) 5889], and we proceed to suggest a way of clarifying it.",
keywords = "High-T superconductivity, Magnetic property, Neutron scattering",
author = "Voo, {Khee Kyun} and Hong-Yi Chen and Wen-Chin Wu",
year = "2002",
month = "11",
day = "1",
doi = "10.1016/S0921-4534(02)01231-5",
language = "English",
volume = "382",
pages = "323--336",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "2-3",

}

TY - JOUR

T1 - Spin excitation in d-wave superconductors

T2 - A Fermi liquid picture

AU - Voo, Khee Kyun

AU - Chen, Hong-Yi

AU - Wu, Wen-Chin

PY - 2002/11/1

Y1 - 2002/11/1

N2 - A detailed study of the inelastic neutron scattering (INS) spectra of the high-Tc cuprates based on the Fermi liquid (FL) picture is given. We focus on the issue of the transformation between the commensurate and incommensurate (IC) excitation driven by frequency or temperature. For La2-xSrxCuO4 (LSCO), the condition of small Δ(0)/vF can simultaneously reproduce the always existing IC peaks in the superconducting (SC) and normal states, and the always fixed location at temperature or frequency change. For YBa2Cu3O6+x (YBCO), a moderate Δ(0)/vF and proximity of the van Hove singularity (vHS) at M=(0,π) to the Fermi level can reproduce the frequency- and temperature-driven shifting IC peaks in the SC state, and the vanishing of the IC peak in the normal state. We address the conditional peak shifting behavior to a refined consideration on the nesting effect which is previously overlook. As a result, both the well documented data on LSCO and the recent data on YBCO (on YBa2Cu3O6.7 by [Phys. Rev. Lett 83 (1999) 608] and YBa2Cu3O6.85 by [Science 288 (2000) 1234]) can be reasonably reconciled within a FL picture. We also point out that the one-dimensional-like data by [Condmat/9811100; Nature 404 (2000) 729] on a detwinned and more underdoped sample YBa2Cu3O6.6 could be due to a gap anisotropy effect originally discussed by [Phys. Rev. B 53 (1996) 5889], and we proceed to suggest a way of clarifying it.

AB - A detailed study of the inelastic neutron scattering (INS) spectra of the high-Tc cuprates based on the Fermi liquid (FL) picture is given. We focus on the issue of the transformation between the commensurate and incommensurate (IC) excitation driven by frequency or temperature. For La2-xSrxCuO4 (LSCO), the condition of small Δ(0)/vF can simultaneously reproduce the always existing IC peaks in the superconducting (SC) and normal states, and the always fixed location at temperature or frequency change. For YBa2Cu3O6+x (YBCO), a moderate Δ(0)/vF and proximity of the van Hove singularity (vHS) at M=(0,π) to the Fermi level can reproduce the frequency- and temperature-driven shifting IC peaks in the SC state, and the vanishing of the IC peak in the normal state. We address the conditional peak shifting behavior to a refined consideration on the nesting effect which is previously overlook. As a result, both the well documented data on LSCO and the recent data on YBCO (on YBa2Cu3O6.7 by [Phys. Rev. Lett 83 (1999) 608] and YBa2Cu3O6.85 by [Science 288 (2000) 1234]) can be reasonably reconciled within a FL picture. We also point out that the one-dimensional-like data by [Condmat/9811100; Nature 404 (2000) 729] on a detwinned and more underdoped sample YBa2Cu3O6.6 could be due to a gap anisotropy effect originally discussed by [Phys. Rev. B 53 (1996) 5889], and we proceed to suggest a way of clarifying it.

KW - High-T superconductivity

KW - Magnetic property

KW - Neutron scattering

UR - http://www.scopus.com/inward/record.url?scp=0036838905&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036838905&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(02)01231-5

DO - 10.1016/S0921-4534(02)01231-5

M3 - Article

VL - 382

SP - 323

EP - 336

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 2-3

ER -