Vortex dynamics of heavy-ion-irradiated YBa 2 Cu 3 O 7 − δ : Experimental evidence for a reduced vortex mobility at the matching field
Vortex dynamics of heavy-ion-irradiated YBa 2 Cu 3 O 7 − δ : Experimental evidence for a reduced vortex mobility at the matching field
复制标题
重离子辐照 YBa 2 Cu 3 O 7 − δ 的涡流动力学：匹配场处涡流迁移率降低的实验证据
DOI：
10.1103/physrevb.58.r8909
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发表时间：
1998
影响因子：
3.7
通讯作者：
S. Foltyn
中科院分区：
文献类型：
--
作者：
A. Mazilu;H. Safar;M. Maley;J. Coulter;L. Bulaevskii;S. Foltyn
Electrical transport measurements in heavy-ion-irradiated ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ thick films reveal a clear maximum of the critical current when the applied magnetic field is approximately equal to the magnetic field at which all columnar defects are occupied. This result directly indicates that vortex mobility is greatly reduced when no vacant columns are available. We suggest that this result is a vestige of the Mott insulator phase predicted for the vortex system at zero temperatures.
Electrical transport measurements in heavy-ion-irradiated ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ thick films reveal a clear maximum of the critical current when the applied magnetic field is approximately equal to the magnetic field at which all columnar defects are occupied. This result directly indicates that vortex mobility is greatly reduced when no vacant columns are available. We suggest that this result is a vestige of the Mott insulator phase predicted for the vortex system at zero temperatures.