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19 April 2024 |
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A four unit cell periodic pattern of quasi-particle states surrounding vortex cores in Bi2Sr2CaCu2O8+delta | | J E Hoffman
; E W Hudson
; K M Lang
; V Madhavan
; H Eisaki
; S Uchida
; J C Davis
; | | Date: |
18 Jan 2002 | | Journal: | Science, 295 (5554), 466-9 | | Abstract: | Scanning tunneling microscopy is used to image the additional quasi-particle states generated by quantized vortices in the high critical temperature superconductor Bi2Sr2CaCu2O8+delta. They exhibit a copper-oxygen bond-oriented "checkerboard" pattern, with four unit cell (4a0) periodicity and a approximately 30 angstrom decay length. These electronic modulations may be related to the magnetic field-induced, 8a0 periodic, spin density modulations with decay length of approximately 70 angstroms recently discovered in La1.84Sr0.16CuO4. The proposed explanation is a spin density wave localized surrounding each vortex core. General theoretical principles predict that, in the cuprates, a localized spin modulation of wavelength lambda should be associated with a corresponding electronic modulation of wavelength lambda/2, in good agreement with our observations. | | Source: | PubMed, pmid11799234 doi: 10.1126/science.1066974 | | Services: | Forum | Review | Favorites | |
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