High-T superconductor near the S–I transition
| Autor: | Hirochika Nakajima, Ichiro Terasaki, Hiroyuki Shibata, Azusa Matsuda, Takao Watanabe, Takenori Fujii, T. Kasai |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Band gap Doping Energy Engineering and Power Technology Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Tunnel effect law Condensed Matter::Superconductivity Density of states Cuprate Electrical and Electronic Engineering Scanning tunneling microscope Pseudogap |
| Zdroj: | Physica C: Superconductivity. 469:1016-1019 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2009.05.179 |
| Popis: | We report on the density of states measurements of Bi2212 (Bi 2+x Sr x CaCu 2 O 8+δ ) near the superconductivity-insulator transition using a low temperature scanning tunneling microscope. We prepared highly underdoped Bi rich Bi2212 single crystals (T c ∼ 32 K). The energy gap distribution did not provide an energy scale proportional to T c . Averaged tunnel spectra with various doping levels were scaled into a single line if energy was normalized by their respective gap values. This indicated there was no crossover energy, which separates a pseudogap and a superconducting gap. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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