Anisotropic rescaling of a splayed pinning landscape in hg cuprates: Strong vortex pinning and recovery of variable range hopping

L. Krusin-Elbaum; G. Blatter; J. R. Thompson; D. K. Petrov; R. Wheeler; J. Ullmann; C. W. Chu

doi:10.1103/PhysRevLett.81.3948

Anisotropic rescaling of a splayed pinning landscape in hg cuprates: Strong vortex pinning and recovery of variable range hopping

L. Krusin-Elbaum, G. Blatter, J. R. Thompson, D. K. Petrov, R. Wheeler, J. Ullmann, C. W. Chu

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Abstract

Strong vortex pinning by fission-induced uniformly splayed columnar tracks in anisotropic mercury cuprates is demonstrated to result from (re)scaling of the pinning landscape by a large superconducting anisotropy. The effective “narrowing” of the splay distribution restores variable range vortex hopping (VRH) motion expected for nearly parallel pins. VRH emerges as a distinctive peak in the vortex creep rate (∼12% at low fields at T/T_c ∼ 0.5) of the most anisotropic HgBa₂ Ca₂ Cu₃ O_{8 + δ}, a peak well described by a glassy dynamics with the characteristic exponent μ ∼ 1/3.

Original language	English
Pages (from-to)	3948-3951
Number of pages	4
Journal	Physical review letters
Volume	81
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.81.3948
Publication status	Published - 1998 Nov 2

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.81.3948

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abstract = "Strong vortex pinning by fission-induced uniformly splayed columnar tracks in anisotropic mercury cuprates is demonstrated to result from (re)scaling of the pinning landscape by a large superconducting anisotropy. The effective “narrowing” of the splay distribution restores variable range vortex hopping (VRH) motion expected for nearly parallel pins. VRH emerges as a distinctive peak in the vortex creep rate (∼12% at low fields at T/Tc ∼ 0.5) of the most anisotropic HgBa2 Ca2 Cu3 O8 + δ, a peak well described by a glassy dynamics with the characteristic exponent μ ∼ 1/3.",

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AU - Blatter, G.

AU - Thompson, J. R.

AU - Petrov, D. K.

AU - Wheeler, R.

AU - Ullmann, J.

AU - Chu, C. W.

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AB - Strong vortex pinning by fission-induced uniformly splayed columnar tracks in anisotropic mercury cuprates is demonstrated to result from (re)scaling of the pinning landscape by a large superconducting anisotropy. The effective “narrowing” of the splay distribution restores variable range vortex hopping (VRH) motion expected for nearly parallel pins. VRH emerges as a distinctive peak in the vortex creep rate (∼12% at low fields at T/Tc ∼ 0.5) of the most anisotropic HgBa2 Ca2 Cu3 O8 + δ, a peak well described by a glassy dynamics with the characteristic exponent μ ∼ 1/3.

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Anisotropic rescaling of a splayed pinning landscape in hg cuprates: Strong vortex pinning and recovery of variable range hopping

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