Please use this identifier to cite or link to this item:
http://hdl.handle.net/2307/376
DC Field | Value | Language |
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dc.contributor.author | Giura, Maurizio | - |
dc.contributor.author | Pompeo, Nicola | - |
dc.contributor.author | Silva, Enrico | - |
dc.date.accessioned | 2010-07-28T15:51:39Z | - |
dc.date.available | 2010-07-28T15:51:39Z | - |
dc.date.issued | 2009-04-01 | - |
dc.identifier.issn | 1098-0121 | - |
dc.identifier.uri | http://hdl.handle.net/2307/376 | - |
dc.description.abstract | Motivated by the peculiar features observed through intrinsic tunneling spectroscopy of Bi2Sr2CaCu2O8+delta mesas in the normal state, we have extended the normal-state two-barrier model for the c-axis transport [M. Giura , Phys. Rev. B 68, 134505 (2003)] to the analysis of dI/dV curves. We have found that the purely normal-state model reproduces all the following experimental features: (a) the parabolic V dependence of dI/dV in the high-T region (above the conventional pseudogap temperature), (b) the emergence and the nearly voltage-independent position of the "humps" from this parabolic behavior by lowering the temperature, and (c) the crossing of the absolute dI/dV curves at a characteristic voltage V-x. Our findings indicate that conventional tunneling can be at the origin of most of the uncommon features of the c-axis transport in Bi2Sr2CaCu2O8+delta. We have compared our calculations to experimental data taken in severely underdoped and slightly underdoped Bi2Sr2CaCu2O8+delta small mesas. We have found good agreement between the data and the calculations, without any shift of the calculated dI/dV on the vertical scale. In particular, in the normal state (above T-*) simple tunneling reproduces the experimentaldI/dV quantitatively. Below T-* quantitative discrepancies are limited to a simple rescaling of the voltage in the theoretical curves by a factor similar to 2. The need for such modifications remains an open question, that might be connected to a change of the charge of a fraction of the carriers across the pseudogap opening. | en |
dc.language.iso | en | en |
dc.publisher | American Physical Society | en |
dc.relation.ispartof | Physical Review B | en |
dc.rights | The American Physical Society | en |
dc.subject | SUPERCONDUCTING GAP | en |
dc.subject | OVERDOPED BI2SR2CACU2O8+DELTA | en |
dc.subject | SPECTROSCOPY | en |
dc.subject | PSEUDOGAP | en |
dc.subject | RESISTIVITY | en |
dc.subject | CRYSTALS | en |
dc.title | Nonlinear c-axis transport in Bi2Sr2CaCu2O8+delta from two-barrier tunneling | en |
dc.type | Article | en |
dc.subject.miur | Settori Disciplinari MIUR::Scienze fisiche | en |
dc.subject.miur | Scienze fisiche | - |
dc.subject.isicrui | Categorie ISI-CRUI::Scienze fisiche | en |
dc.subject.isicrui | Scienze fisiche | - |
dc.subject.anagraferoma3 | Scienze fisiche | en |
dc.relation.volumenumber | 79 | en |
dc.relation.pagenumber | 144504 | en |
dc.identifier.doi | 10.1103/PhysRevB.79.144504 | - |
dc.relation.issuenumber | 14 | en |
dc.description.romatrecurrent | Dipartimento di Fisica 'Edoardo Amaldi' | * |
item.grantfulltext | restricted | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | other | - |
Appears in Collections: | A - Articolo su rivista X_Dipartimento di Fisica 'Edoardo Amaldi' |
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PhysRevB_79_144504-tunnel.pdf | solo archivio | 614.33 kB | Adobe PDF | Request a copy |
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