Doping Dependence of Two Energy Scales in the Tunneling Spectra of Superconducting La$_{2-x}$Sr$_{x}$CuO$_{4}$

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dc.creatorKato, T.
dc.creatorMaruyama, T.
dc.creatorOkitsu, S.
dc.creatorSakata, H.
dc.date2008-03-10
dc.date2008-04-07
dc.date.accessioned2026-07-07T09:34:53Z
dc.date.available2026-07-07T09:34:53Z
dc.descriptionScanning tunneling microscopy and spectroscopy have been performed on superconducting La$_{2-x}$Sr$_{x}$CuO$_{4}$ ($x=0.06, 0.12, 0.16$, and 0.21) at 4.2 K. Atomically resolved surface topography has been observed on the $ab$ surface, which exhibits a one-dimensional structure corresponding to the buckling pattern of the orthorhombic phase. The tunneling spectra of all samples exhibit kinks at about $\pm 5$ meV in addition to the energy gap, indicating the existence of two energy scales. While the gap magnitude varies on the length scale of a few nm and steadily increases upon underdoping, the kink energy is spatially uniform on the surface and almost independent of the doping level.
dc.description5 pages, 4 figures, to be published in J. Phys. Soc. Jpn Vol.77 No.5
dc.identifierhttps://arxiv.org/abs/0803.1415
dc.identifierhttp://arxiv.org/abs/0803.1415
dc.identifierJ. Phys. Soc. Jpn. 77, 054710 (2008)
dc.identifierdoi:10.1143/JPSJ.77.054710
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/159653
dc.subjectSuperconductivity
dc.titleDoping Dependence of Two Energy Scales in the Tunneling Spectra of Superconducting La$_{2-x}$Sr$_{x}$CuO$_{4}$
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