The Correlation between the Energy Gap and the Pseudogap Temperature in Cuprates: The YCBCZO and LSHCO Case
The paper analyzes the influence of the hole density, the out-of-plane or in-plane disorder, and the isotopic oxygen mass on the zero temperature energy gap (2Δ(0)) Y1-xCaxBa2Cu1-yZny3O7-δ (YCBCZO) and La1.96-xSrxHo0.04CuO4 (LSHCO) superconductors. It has been found that the energy gap is visibly co...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2015/969564 |
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| Summary: | The paper analyzes the influence of the hole density, the out-of-plane or in-plane disorder, and the isotopic oxygen mass on the zero temperature energy gap (2Δ(0)) Y1-xCaxBa2Cu1-yZny3O7-δ (YCBCZO) and La1.96-xSrxHo0.04CuO4 (LSHCO) superconductors. It has been found that the energy gap is visibly correlated with the value of the pseudogap temperature (T⋆). On the other hand, no correlation between 2Δ(0) and the critical temperature (TC) has been found. The above results mean that the value of the dimensionless ratio 2Δ0/kBTC can vary very strongly together with the chemical composition, while the parameter 2Δ(0)/kBT⋆ does not change significantly. In the paper, the analytical formula which binds the zero temperature energy gap and the pseudogap temperature has been also presented. |
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| ISSN: | 1687-8108 1687-8124 |