Evidence of a Normal-State Pseudogap in Bulk Superconducting Tunneling Junctions of YBa2Cu3O7-δ
Planar contact tunneling experiments have been performed on bulk superconducting tunneling junctions of YBa2Cu3O7-δ in the temperature range 77 -295K. A clear depression in the conductance curves measured, attributed to the pseudogap, has been observed in temperatures above Tc (approx. 90K determine...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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University of the Philippines
1999-12-01
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| Series: | Science Diliman |
| Subjects: | |
| Online Access: | http://journals.upd.edu.ph/index.php/sciencediliman/article/view/235 |
| _version_ | 1819237223594196992 |
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| author | Leandro Guerra Mildred Reyes Ayn Manuel Roland Sarmago Arnel Salvador |
| author_facet | Leandro Guerra Mildred Reyes Ayn Manuel Roland Sarmago Arnel Salvador |
| author_sort | Leandro Guerra |
| collection | DOAJ |
| description | Planar contact tunneling experiments have been performed on bulk superconducting tunneling junctions of YBa2Cu3O7-δ in the temperature range 77 -295K. A clear depression in the conductance curves measured, attributed to the pseudogap, has been observed in temperatures above Tc (approx. 90K determined from dc resistivity measurements) before disappearing at T*=275K. The width of the pseudogap has been quantitatively measured as Dps, ave = 25.6meV from the differential conductance plots. These results agree with the current understanding of the phenomenology and nature of this pseudogap, namely: (I) the pseudogap value is relatively temperature-independent; (2) the superconducting gap and the pseudogap have the same d-wave nature; and (3) the superconducting gap evolves from the pseudogap. |
| first_indexed | 2024-12-23T13:16:55Z |
| format | Article |
| id | doaj.art-6ab72f2b4ec548b8a97f87a4b1d94421 |
| institution | Directory Open Access Journal |
| issn | 0115-7809 2012-0818 |
| language | English |
| last_indexed | 2024-12-23T13:16:55Z |
| publishDate | 1999-12-01 |
| publisher | University of the Philippines |
| record_format | Article |
| series | Science Diliman |
| spelling | doaj.art-6ab72f2b4ec548b8a97f87a4b1d944212022-12-21T17:45:35ZengUniversity of the PhilippinesScience Diliman0115-78092012-08181999-12-011121114Evidence of a Normal-State Pseudogap in Bulk Superconducting Tunneling Junctions of YBa2Cu3O7-δLeandro GuerraMildred ReyesAyn ManuelRoland SarmagoArnel SalvadorPlanar contact tunneling experiments have been performed on bulk superconducting tunneling junctions of YBa2Cu3O7-δ in the temperature range 77 -295K. A clear depression in the conductance curves measured, attributed to the pseudogap, has been observed in temperatures above Tc (approx. 90K determined from dc resistivity measurements) before disappearing at T*=275K. The width of the pseudogap has been quantitatively measured as Dps, ave = 25.6meV from the differential conductance plots. These results agree with the current understanding of the phenomenology and nature of this pseudogap, namely: (I) the pseudogap value is relatively temperature-independent; (2) the superconducting gap and the pseudogap have the same d-wave nature; and (3) the superconducting gap evolves from the pseudogap.http://journals.upd.edu.ph/index.php/sciencediliman/article/view/235pseudogaptunnelingYBa2Cu3O7-δ |
| spellingShingle | Leandro Guerra Mildred Reyes Ayn Manuel Roland Sarmago Arnel Salvador Evidence of a Normal-State Pseudogap in Bulk Superconducting Tunneling Junctions of YBa2Cu3O7-δ Science Diliman pseudogap tunneling YBa2Cu3O7-δ |
| title | Evidence of a Normal-State Pseudogap in Bulk Superconducting Tunneling Junctions of YBa2Cu3O7-δ |
| title_full | Evidence of a Normal-State Pseudogap in Bulk Superconducting Tunneling Junctions of YBa2Cu3O7-δ |
| title_fullStr | Evidence of a Normal-State Pseudogap in Bulk Superconducting Tunneling Junctions of YBa2Cu3O7-δ |
| title_full_unstemmed | Evidence of a Normal-State Pseudogap in Bulk Superconducting Tunneling Junctions of YBa2Cu3O7-δ |
| title_short | Evidence of a Normal-State Pseudogap in Bulk Superconducting Tunneling Junctions of YBa2Cu3O7-δ |
| title_sort | evidence of a normal state pseudogap in bulk superconducting tunneling junctions of yba2cu3o7 δ |
| topic | pseudogap tunneling YBa2Cu3O7-δ |
| url | http://journals.upd.edu.ph/index.php/sciencediliman/article/view/235 |
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