C-axis tunneling in Bi2Sr2CaCu2O8+δ in the magnetic field up to 60 T
| Autor: | L. N. Bulaevskii, M. P. Maley, Lia Krusin-Elbaum, Takasada Shibauchi, Tsutomu Yamashita, N. Morozov, Yu. I. Latyshev |
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| Rok vydání: | 2000 |
| Předmět: |
Physics
Magnetoresistance Condensed matter physics Field (physics) Energy Engineering and Power Technology Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Tunnel effect Electrical resistivity and conductivity Quasiparticle Fermi liquid theory Electrical and Electronic Engineering Cooper pair |
| Zdroj: | Physica C: Superconductivity. :1511-1514 |
| ISSN: | 0921-4534 |
| Popis: | We report on the c -axis resistivity ϱ c ( H ) in Bi 2 Sr 2 CaCu 2 O 8+δ that exhibits a maximum in quasi-static magnetic fields up to 60 T. We show that below T c c -axis tunneling is a parallel, two-channel process: (i) σ j of Cooper pairs and (ii) σ q of quasiparticles: σ c = σ j + σ q . We demonstrate that high-field c -armaxis conductivity is linear-in-field at H H c 2 , in agreement with the field-linear dependence of quasiparticle conductivity σ q we find in mesas. Near 60 T, as temperature decreases, ϱ c saturates, confirming a gapless spectrum of quasiparticles. The linear ϱ c ( H ) behavior extends up to the maximum field in experiment (60T), beyond the applicability of the Fermi-liquid approach, which can be due to effects of the pseudo gap, not accounted in the model. |
| Databáze: | OpenAIRE |
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