Magneto-optical Evidence for a Gapped Fermi Surface in UnderdopedYBa2Cu3O6+x
| Autor: | Robert A. Hughes, E. Osquiguil, H. D. Drew, L. B. Rigal, G. D. Gu, Schmadel Donald C, Boris Maiorov, John S. Preston |
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| Rok vydání: | 2004 |
| Předmět: |
Physics
Superconductivity Condensed matter physics Magnetoresistance General Physics and Astronomy Fermi surface 02 engineering and technology Atmospheric temperature range 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Mott transition symbols.namesake Hall effect Condensed Matter::Superconductivity 0103 physical sciences Faraday effect symbols Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review Letters. 93 |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | The infrared (900-1100 cm(-1)) Faraday rotation and circular dichroism are measured in the normal state of underdoped High T(c) superconductors and used to study the magnetotransport. YBa2Cu3O6+x thin films are investigated in the temperature range 10-300 K in magnetic fields up to 8 T and as a function of oxygen concentration. A dramatic increase of the Hall frequency is observed for underdoped samples, which is not consistent with the approach to a Mott transition but is consistent with a partial gapping of the Fermi surface as predicted in density wave models. |
| Databáze: | OpenAIRE |
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