Energy gap of the high-Tc superconductor HgBa2Ca2Cu3O8+δ determined by point-contact spectroscopy
G. T. Jeong, J. I. Kye, S. H. Chun, Sergey Lee, S. I. Lee, Z. G. Khim
DOI 10.1103/PhysRevB.49.15416 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Tunneling spectra of a polycrystalline bulk HgBa2Ca2Cu3O8+δ with Tc=132 K have been measured by point-contact spectroscopy using a low-temperature scanning tunneling microscope. Unlike other high-Tc superconductors, the conductance of this material shows a BCS-like gap structure with a relatively small smearing parameter Γ. Conductances with a linear density of states for ‖eV‖<Δ and a small cusp at the gap are also observed. From a simple calculation based on the assumption that the surface is covered with a normal layer, we explained the linear dI/dV for ‖eV‖<Δ and obtained two distinctively different energy gaps Δ=48 meV and 22 meV with the resultant 2Δ/kBTc=8.5 and 3.9, respectively.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| HgBa2Ca2Cu3O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 132 | Pressure not reported | zero_resistance |
| HgBa2Ca2Cu3O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 132 | Pressure not reported | onset |
| HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
Similar papers
Pressure studies on the pseudogap and critical temperatures of a high-Tc superconductor
similarity 0.96E. V. L. de Mello et al.
Source status unknown — claims are unverified
Transition temperature and a spatial dependence of the superconducting gap for multilayer high-temperature superconductors
similarity 0.95Krzysztof Byczuk & Jozef Spałek
Source status unknown — claims are unverified
Synthesis, structure, and properties of the high-temperature superconductor HgBa2CuO4+δ
similarity 0.95J. P. Hodges et al.
Source status unknown — claims are unverified
Optical and thermodynamic properties of the high-temperature superconductor HgBa2CuO4+δ
similarity 0.95E. van Heumen et al.
Source status unknown — claims are unverified
Evidence for Weakly Correlated Oxygen Holes in the Highest-Tc Cuprate Superconductor HgBa2Ca2Cu3O8+δ
similarity 0.94A. Chainani et al.
Source status unknown — claims are unverified
Resistivity study of the pseudogap phase for (Hg,Re)-1223 superconductors
similarity 0.94C. A. C. Passos et al.
Source status unknown — claims are unverified