{"title":"c-axis tunneling and magnetic field splitting of the quasiparticle states in planar ndba2Cu3O7−δ/prba2cu3O7−δ/ndba2cu3O7−δ quasi-homostructures","authors":"G.A Alvarez, T Utagawa, Y Enomoto","doi":"10.1016/S0964-1807(99)00035-6","DOIUrl":null,"url":null,"abstract":"<div><p>We report on high quality planar junctions fabricated from well characterized c-axis quasi-homoepitaxial NdBa<sub>2</sub> Cu<sub>3</sub>O<sub>7−<em>δ</em></sub>/PrBa<sub>2</sub>Cu<sub>3</sub>O<sub>7−<em>δ</em></sub>/NdBa<sub>2</sub>Cu<sub>3</sub>O<sub>7−<em>δ</em></sub> multilayers. C-axis tunneling spectroscopy investigations provide evidence of quasiparticle tunneling that is commonly observed for superconductor-insulator-superconductor (SIS) junctions. We observed a temperature dependent BCS like gap giving 2Δ/<em>K</em><sub>B</sub><em>T</em><sub>c</sub>=6. The tunneling conductance d<em>I</em>/d<em>V</em> of the junctions in parallel magnetic field reveals an anomalous splitting of the superconducting quasiparticle density of states. The magnitude of the splitting can be related to the magnetic moment of the quasiparticles.</p></div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 10","pages":"Pages 727-733"},"PeriodicalIF":0.0000,"publicationDate":"1999-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(99)00035-6","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Superconductivity","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0964180799000356","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We report on high quality planar junctions fabricated from well characterized c-axis quasi-homoepitaxial NdBa2 Cu3O7−δ/PrBa2Cu3O7−δ/NdBa2Cu3O7−δ multilayers. C-axis tunneling spectroscopy investigations provide evidence of quasiparticle tunneling that is commonly observed for superconductor-insulator-superconductor (SIS) junctions. We observed a temperature dependent BCS like gap giving 2Δ/KBTc=6. The tunneling conductance dI/dV of the junctions in parallel magnetic field reveals an anomalous splitting of the superconducting quasiparticle density of states. The magnitude of the splitting can be related to the magnetic moment of the quasiparticles.
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