Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2225
Title: Modeling study of the dip-hump feature in Bi2 Sr2 CaCu2 O8+? tunneling spectroscopy
Authors: Romano, Pierom
Özyüzer, Lütfi
Yusof, Zikri
Kurter, Cihan
Zasadzinski, John F.
Özyüzer, Lütfi
Keywords: Tunneling phenomena
Josephson effects
Cuprate superconductors
Issue Date: 2006
Publisher: American Physical Society
Source: Romano, P., Özyüzer, L., Yusof, Z., Kurter, C., and Zasadzinski, J. F. (2006). Modeling study of the dip-hump feature in Bi2 Sr2 CaCu2 O8+δ tunneling spectroscopy. Physical Review B - Condensed Matter and Materials Physics, 73(9). doi:10.1103/PhysRevB.73.092514
Abstract: The tunneling spectra of high-temperature superconductors on Bi2 Sr2 CaCu2 O8+δ (Bi-2212) reproducibly show a high-bias structure in the form of a dip-hump at voltages higher than the gap voltage. Of central concern is whether this feature originates from the normal state background or is intrinsic to the superconducting mechanism. We address this issue by generating a set of model conductance curves-a "normal state" conductance that takes into account effects such as the band structure and a possible pseudogap, and a pure superconducting state conductance. When combined, the result shows that the dip-hump feature present in the experimental conductance curves cannot be naively attributed to a normal state effect. In particular, strong dip features found in superconductor-insulator-superconductor data on optimally doped Bi-2212, including negative dI dV, cannot be a consequence of an extrinsic pseudogap. However, such features can easily arise from state-conserving deviations in the superconducting density of states, e.g., from strong-coupling effects.
URI: http://doi.org/10.1103/PhysRevB.73.092514
http://hdl.handle.net/11147/2225
ISSN: 1098-0121
1098-0121
1550-235X
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
2225.pdfMakale69.32 kBAdobe PDFThumbnail
View/Open
Show full item record

CORE Recommender

SCOPUSTM   
Citations

11
checked on Oct 23, 2021

WEB OF SCIENCETM
Citations

12
checked on Oct 23, 2021

Page view(s)

18
checked on Oct 26, 2021

Download(s)

22
checked on Oct 26, 2021

Google ScholarTM

Check

Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.