Doping-induced evolution of the intrinsic hump and dip energies dependent on the sample fabrication conditions in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$

Abstract

In oxygen-doped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$, the spectra, as observed by tunneling or photoemission spectroscopic measurements, depend on the sample fabrication conditions, such as the temperature and pressure for fabricating the junction or surface. This implies that the hump and dip energies extracted from the spectra depend on the sample fabrication conditions. When the samples were fabricated at 4.2 K and/or under ultra-high vacuum (UHV), the hump energy exhibited a new step-like doping dependence and the dip energy followed the upper pseudo-gap line. As the fabrication conditions deteriorated, the hump and dip energies reproduced the previous results, in that the dip energy was significantly dependent on the sample, whereas the hump energy exhibited a smooth doping dependence. It can be concluded that the observations for the samples fabricated at 4.2 K and/or under UHV reflect the intrinsic bulk properties, whereas those for the samples fabricated under deteriorated conditions reflect degraded surface properties.

arXiv comment34 pages, 4 figures, & Supplementary Material

References in corpus (24)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+d
• Electronic Spectra and Their Relation to the (pi,pi) Collective Mode in High-Tc Superconductors
• Phase competition in trisected superconducting dome
• Inherent Inhomogeneities in Tunneling Spectra of BSCCO Crystals in the Superconducting State
• Predominantly Superconducting Origin of Large Energy Gaps in Underdoped Bi2Sr2CaCu2O8-d from Tunneling Spectroscopy
• Coherent quasiparticle weight and its connection to high-T_c superconductivity from angle-resolved photoemission
• Correlation of Tunneling Spectra in Bi2Sr2CaCu2O(8+delta) with the Resonance Spin Excitation
• Collapse of the Fermi surface and fingerprints of order in the pseudogap state of cuprate superconductors
• Energy gap evolution in the tunneling spectra of Bi2Sr2CaCu2O8+d
• Electronic phase diagram of high temperature copper oxide superconductors
• Periodic Coherence Peak Height Modulations in Superconducting BSCCO
• Unified electronic phase diagram for hole-doped high-Tc cuprates
• Tunneling Spectroscopy of Overdoped Bi2Sr2CaCu2O8+d Single Crystals
• A momentum-dependent perspective on quasiparticle interference in Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}
• A Universal Intrinsic Scale of Hole Concentration for High-Tc Cuprates
• Distinct Superconducting Gap on Two Bilayer-Split Fermi Surface Sheets in $B{i}_{2}S{r}_{2}CaC{u}_2{O}_{8+\delta }$ Superconductor
• Tunneling Spectra and Superconducting Gap in Bi2Sr2CaCu2O8+d and Tl2Ba2CuO6+d
• Mechanism of High-Tc Superconductivity Based Mainly on Tunneling Measurements in Cuprates
• Intrinsic electronic superconducting phases at 60 K and 90 K in double-layer YBa${}_2$Cu${}_3$O${}_{6+\delta }$
• Evidence for a Quasi-1D Topological-Excitation Liquid in Bi2212 by Tunneling Spectroscopy
• Controlling the carrier concentration of the high temperature superconductor Bi2Sr2CaCu2O{8+x} in Angle Resolved Photoemission Spectroscopy (ARPES) experiments
• Observation of the predicted charge collective mode of the Tc = 45 K superconducting phase of La2CuO4+δ
• On the quantitative determination of hole-concentration in high-temperature cuprate superconductors