Anisotropic Rescaling of a Splayed Pinning Landscape in Hg Cuprates: Strong Vortex Pinning and Recovery of Variable Range Hopping
- IBM Research, Yorktown Heights, New York 10598 (United States)
- ETH-Hoenggerberg, CH-8093 Zuerich (Switzerland)
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- UES Incorporated, Dayton, Ohio 45432 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Texas Center for Superconductivity, Houston University, Houston, Texas 77204 (United States)
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 {open_quotes}narrowing{close_quotes} 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 ({approximately}12{percent} at low fields at T/T{sub c}{approximately}0.5 ) of the most anisotropic HgBa{sub 2}Ca {sub 2}Cu{sub 3}Othinsp{sub 8+{delta}} , a peak well described by a glassy dynamics with the characteristic exponent {mu}{approximately}1/3 . {copyright} {ital 1998} {ital The American Physical Society }
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 665571
- Journal Information:
- Physical Review Letters, Vol. 81, Issue 18; Other Information: PBD: Nov 1998
- Country of Publication:
- United States
- Language:
- English
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