Transport results from untwinned YBCO: Washboard frequency of the vortex lattice, and the quasiparticle mean free path

Jeffrey M. Harris; K. Krishana; N. P. Ong; R. Gagnon; L. Taillefer

doi:10.1007/BF00768493

Transport results from untwinned YBCO: Washboard frequency of the vortex lattice, and the quasiparticle mean free path

Jeffrey M. Harris, K. Krishana, N. P. Ong, R. Gagnon, L. Taillefer

Research output: Contribution to journal › Article › peer-review

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Abstract

The "washboard frequency" ω of the moving vortex lattice in untwinned YBa₂Cu₃O_6.93 may be observed through mode-locking to an externally applied ac current of frequency ω_ext. The interference between ω and ω_ext results in jumps in the dc current-voltage characteristics when ω and ω_ext are harmonically related.¹ The interference effect disappears in the vortex liquid state. The Hall conductivity σ_xy below T_c in YBCO contains contributions² from a positive quasiparticle (qp) term (∼H) and a negative vortex term (∼1/H). The qp term is surprisingly large well below T_c and implies a large gap anisotropy and a long qp mean free path (mfp). The thermal Hall effect³ κ_xy is closely related to the qp σ_xy; κ_xy is produced by asymmetric scattering of qp by pinned vortices. The qp mfp at H = 0, extracted from σ_xy and extended to low T by κ_xy, increases remarkably from 90 Å at T_c to more than 0.5μm at 22 K.

Original language	English (US)
Pages (from-to)	877-886
Number of pages	10
Journal	Journal of Low Temperature Physics
Volume	105
Issue number	3-4
DOIs	https://doi.org/10.1007/BF00768493
State	Published - 1996

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

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title = "Transport results from untwinned YBCO: Washboard frequency of the vortex lattice, and the quasiparticle mean free path",

abstract = "The {"}washboard frequency{"} ω of the moving vortex lattice in untwinned YBa2Cu3O6.93 may be observed through mode-locking to an externally applied ac current of frequency ωext. The interference between ω and ωext results in jumps in the dc current-voltage characteristics when ω and ωext are harmonically related.1 The interference effect disappears in the vortex liquid state. The Hall conductivity σxy below Tc in YBCO contains contributions2 from a positive quasiparticle (qp) term (∼H) and a negative vortex term (∼1/H). The qp term is surprisingly large well below Tc and implies a large gap anisotropy and a long qp mean free path (mfp). The thermal Hall effect3 κxy is closely related to the qp σxy; κxy is produced by asymmetric scattering of qp by pinned vortices. The qp mfp at H = 0, extracted from σxy and extended to low T by κxy, increases remarkably from 90 {\AA} at Tc to more than 0.5μm at 22 K.",

author = "Harris, {Jeffrey M.} and K. Krishana and Ong, {N. P.} and R. Gagnon and L. Taillefer",

year = "1996",

doi = "10.1007/BF00768493",

language = "English (US)",

volume = "105",

pages = "877--886",

journal = "Journal of Low Temperature Physics",

issn = "0022-2291",

publisher = "Springer New York",

number = "3-4",

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TY - JOUR

T1 - Transport results from untwinned YBCO

T2 - Washboard frequency of the vortex lattice, and the quasiparticle mean free path

AU - Harris, Jeffrey M.

AU - Krishana, K.

AU - Ong, N. P.

AU - Gagnon, R.

AU - Taillefer, L.

PY - 1996

Y1 - 1996

N2 - The "washboard frequency" ω of the moving vortex lattice in untwinned YBa2Cu3O6.93 may be observed through mode-locking to an externally applied ac current of frequency ωext. The interference between ω and ωext results in jumps in the dc current-voltage characteristics when ω and ωext are harmonically related.1 The interference effect disappears in the vortex liquid state. The Hall conductivity σxy below Tc in YBCO contains contributions2 from a positive quasiparticle (qp) term (∼H) and a negative vortex term (∼1/H). The qp term is surprisingly large well below Tc and implies a large gap anisotropy and a long qp mean free path (mfp). The thermal Hall effect3 κxy is closely related to the qp σxy; κxy is produced by asymmetric scattering of qp by pinned vortices. The qp mfp at H = 0, extracted from σxy and extended to low T by κxy, increases remarkably from 90 Å at Tc to more than 0.5μm at 22 K.

AB - The "washboard frequency" ω of the moving vortex lattice in untwinned YBa2Cu3O6.93 may be observed through mode-locking to an externally applied ac current of frequency ωext. The interference between ω and ωext results in jumps in the dc current-voltage characteristics when ω and ωext are harmonically related.1 The interference effect disappears in the vortex liquid state. The Hall conductivity σxy below Tc in YBCO contains contributions2 from a positive quasiparticle (qp) term (∼H) and a negative vortex term (∼1/H). The qp term is surprisingly large well below Tc and implies a large gap anisotropy and a long qp mean free path (mfp). The thermal Hall effect3 κxy is closely related to the qp σxy; κxy is produced by asymmetric scattering of qp by pinned vortices. The qp mfp at H = 0, extracted from σxy and extended to low T by κxy, increases remarkably from 90 Å at Tc to more than 0.5μm at 22 K.

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JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

IS - 3-4

ER -

Transport results from untwinned YBCO: Washboard frequency of the vortex lattice, and the quasiparticle mean free path

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