Absence of Andreev bound states in β−PdBi2 probed by point-contact Andreev reflection spectroscopy
Liqiang Che, Tian Le, C. Q. Xu, X. Z. Xing, Zhixiang Shi, Xiaofeng Xu, Xin Lu
DOI 10.1103/PhysRevB.94.024519 · Physical Review B
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Abstract
We report point-contact spectroscopic studies on high quality single crystalline β−PdBi2 with a superconducting Tc=5.2K. Our measurements show a typical double-peak structure in the voltage-biased junction conductance at low temperatures, probably excluding the existence of topological Andreev bound states. The conductance curves can be well fitted with the standard Blonder-Tinkham-Klapwijk model for s-wave superconductors, yielding a superconducting gap Δ0≃0.92meV with 2Δ0/kBTc∼4.1. Our results strongly suggest that β−PdBi2 is a conventional intermediate-coupling s-wave superconductor.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PdBi2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.2 | Pressure unresolved | onset |
| PdBi2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure unresolved | unknown |
| PdBi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.8 | Pressure not reported | unknown |
| PdBi2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.7 | Pressure not reported | unknown |
| Pd2.5Bi1.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.7 | Pressure not reported | unknown |
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