Predominantly Superconducting Origin of Large Energy Gaps in Underdoped Bi2Sr2CaCu2O8-d from Tunneling Spectroscopy

Abstract

New tunneling data are reported in underdoped Bi2Sr2CaCu2O8-d using superconductor-insulator-superconductor break junctions. Energy gaps, Delta, of 51+2, 54+2 and 57+3 meV are observed for three crystals with Tc=77, 74, and 70 K respectively. These energy gaps are nearly three times larger than for overdoped crystals with similar Tc. Detailed examination of tunneling spectra over a wide doping range from underdoped to overdoped, including the Josephson IcRn product, indicate that these energy gaps are predominantly of superconducting origin.

10 pages, 4 figures, 1 table

References in corpus (1)

• Pairing Fluctuation Theory of Superconducting Properties in Underdoped to Overdoped Cuprates

Cited by in corpus (79)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Discovery of microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
• The doping dependence of T* - what is the real high-Tc phase diagram?
• Two Gaps Make a High Temperature Superconductor?
• Interplay of electron-lattice interactions and superconductivity in Bi2Sr2CaCu2O8+d
• Electronic Spectra and Their Relation to the (pi,pi) Collective Mode in High-Tc Superconductors
• Two Energy Scales and two Quasiparticle Dynamics in the Superconducting State of Underdoped Cuprates
• Evidence for coexistence of the superconducting gap and the pseudo - gap in Bi-2212 from intrinsic tunneling spectroscopy
• Imaging the Two Gaps of the High-TC Superconductor Pb-Bi2Sr2CuO6+x
• Pseudogap and spectral function from superconducting fluctuations to the bosonic limit
• Correlation of Tunneling Spectra in Bi2Sr2CaCu2O(8+delta) with the Resonance Spin Excitation
• Universal relation between magnetic resonance and superconducting gap in unconventional superconductors
• Pseudogap from ARPES experiment: three gaps in cuprates and topological superconductivity
• Evidence of Doping-Dependent Pairing Symmetry in Cuprate Superconductors
• Inhomogeneous d-wave superconducting state of a doped Mott insulator
• Sum rules and energy scales in the high-temperature superconductor YBa2Cu3O6+x
• Pairing fluctuations and pseudogaps in the attractive Hubbard model
• Condensation Energy and Spectral Functions in High Temperature Superconductors
• Superconducting phase coherence in the presence of a pseudogap: Relation to specific heat, tunneling and vortex core spectroscopies
• Tunneling Spectroscopy of Overdoped Bi2Sr2CaCu2O8+d Single Crystals
• Modeling scanning tunneling spectra of $B{i}_{2}S{r}_{2}CaC{u}_2{O}_{8+\delta }$
• Persistence of Strong Electron Coupling to a Narrow Boson Spectrum in Overdoped BiSrCaCuO (Bi2212) Tunneling Data
• Sum rules and electrodynamics of high-Tc cuprates in the pseudogap state
• Counterintuitive Consequence of Heating in Strongly-Driven Intrinsic-Junctions of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Mesas
• Singularities in the optical response of cuprates
• Doping dependence of the superconducting gap in Tl_2Ba_2CuO_{6+delta} from heat transport
• Pair Phase Fluctuations and the Pseudogap
• Pseudogap phenomena in ultracold atomic Fermi gases
• SIN and SIS tunneling in cuprates
• Constraints on the Quasiparticle Density of States in High-$T_c$ Superconductors
• Phase-fluctuation induced reduction of the kinetic energy at the superconducting transition
• Superconductivity from Undressing. II. Single Particle Green's Function and Photoemission in Cuprates
• Doping dependent optical properties of Bi2201
• Spectral Weights, d-wave Pairing Amplitudes, and Particle-hole Tunneling Asymmetry of a Strongly Correlated Superconductor
• Quasiparticle density of states in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ single crystals probed using tunneling spectroscopy at ultra-low temperatures in high magnetic fields
• Quasiparticle spectrum of the cuprate BiSrCaCuO: Possible connection to the phase diagram
• Dynamic spin-response function of the high-temperature Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ superconductor form angle resolved photoemission spectra
• Two energy gaps in cuprates: pairing and coherence gaps: The interpretation of tunneling and inelastic neutron scattering measurements
• Modeling Study of the Dip/Hump Feature in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Tunneling Spectroscopy
• Charge density waves as the origin of dip-hump structures in differential tunneling conductance of cuprates: the case of $d$-wave superconductivity
• The electronic specific heat in the pairing pseudogap regime
• Evidence for a Quasi-1D Topological-Excitation Liquid in Bi2212 by Tunneling Spectroscopy
• Quasi-One-Dimensional Topological-Excitation Liquid in Bi2212 from Tunneling Spectroscopy
• c-Axis Phase Coherence and Spin Fluctuations in Cuprates
• Pair-pair interactions as a mechanism for high-T${}_c$ superconductivity
• C-Axis Tunneling Spectra in High-T${}_c$ Superconductors in the Presence of a d Charge-Density Wave
• Spatial homogeneity and doping dependence of quasiparticle tunneling spectra in cuprate superconductors
• Tunneling spectra of layered strongly correlated d-wave superconductors
• Incoherent superconductivity well above $T_c$ in high-$T_c$ cuprates - harmonizing the spectroscopic and thermodynamic data
• THz phonon spectroscopy of doped superconducting cuprates
• The effects of spin fluctuations on the tunneling spectroscopy in High-T_c Superconductors
• Unconventional temperature dependence of the cuprate excitation spectrum
• Non-conservation of Density of States in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_y$: Coexistence of Pseudogap and Superconducting gap
• Origin of the pseudogap phase: Precursor superconductivity versus a competing energy gap scenario
• Anisotropic evolution of energy gap in Bi2212 superconductor
• Relationships between the superconducting gap, pseudogap and transition temperature in High-T_c superconductors
• Pair-breaking effects in the Pseudogap Regime: Application to High Temperature Superconductors
• Probing the Phase Diagram of Bi2Sr2CaCu2O8+d with Tunneling Spectroscopy
• Observation of Andreev reflection in the c-axis transport of Bi_2Sr_2CaCu_2O_{8+x} single crystals near T_c and search for the preformed-pair state
• Analyzing Intrinsic Superconducting Gap by Means of Measurement of Bi-2212 Superconductors
• Precursor effects of the superconducting state caused by d-wave phase-fluctuations above Tc
• Theory of Extrinsic and Intrinsic Tunnelling in Cuprate Superconductors
• Single Junction and Intrinsic Josephson Junction Tunneling Spectroscopies of Bi2Sr2CaCu2O8+d
• Tunneling Spectroscopy of the Underdoped High-$T_c$ Superconductors
• $T_c$ Dependence of Energy Gap and Asymmetry of Coherence Peaks in NdBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Possible Universal Cause of High-T_c Superconductivity in Different Metals
• Pseudogap in cuprate and organic superconductors
• A Consistent Theory of Underdoped Cuprates: Evolution of the RVB State From Half Filling
• Pseudogap-induced asymmetric tunneling in cuprate superconductors
• ab-plane tunneling and Andreev spectroscopy of superconducting gap and pseudogap in (Bi,Pb)2Sr2Ca2Cu3O10 and Bi2Sr2CaCu2O8
• Explanation of small I_cR_n values observed in inhomogeneous superconductors
• Smearing origin of zero-bias conductance peak in Ag-SiO-Bi-2212 planar tunnel junctions: influence of diffusive normal metal verified with the circuit theory
• From the Bose-Einstein to Fermion Condensation
• Small Josephson current and product deduced by means of measurement for an inhomogeneous superconductor: Extension of the Ambegaokar - Baratoff theory
• Energy gaps in high-$T_c$ superconductors: BCS after all?
• Effective action for phase fluctuations in d-wave superconductors near a Mott transition
• Phenomenological model of high-Tc superconductivity: a MCS model
• Condensation mechanism of high-$T_c$ cuprates: the key role of pairon excitations
• Doping-induced evolution of the intrinsic hump and dip energies dependent on the sample fabrication conditions in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$