Periodic coherence-peak height modulations in superconducting Bi2Sr2CaCu2O8+δ
A. Fang, C. Howald, N. Kaneko, M. Greven, A. Kapitulnik
DOI 10.1103/PhysRevB.70.214514 · Physical Review B
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Abstract
In this paper we analyze, using scanning tunneling spectroscopy (STS), the local density of electronic states (LDOS) in nearly optimally doped Bi2Sr2CaCu2O8+δ in zero magnetic field. We see both dispersive and nondispersive spatial LDOS modulations as a function of energy in our samples. Moreover, a spatial map of the superconducting coherence peak heights shows the same structure as the low-energy LDOS. This suggests that these nondispersive LDOS modulations originate from an underlying charge-density modulation, which interacts with superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86.5 | Pressure not reported | unknown |
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