Visualizing the d vector in a nematic triplet superconductor
Wei-Cheng Bao, Qing-Kun Tang, Da-Chuan Lu, Qiang-Hua Wang
DOI 10.1103/PhysRevB.98.054502 · Physical Review B
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Abstract
Recent experiments show strong evidences of nematic triplet superconductivity in doped Bi2Se3 and in Bi2Te3 thin film on a superconducting substrate, but with varying identifications of the direction of the d vector of the triplet that is essential to the topology of the underlying superconductivity. Here we show that the d vector can be directly visualized by scanning tunneling measurements: At subgap energies the d vector is along the leading peak wave vector in the quasiparticle-interference (QPI) pattern for potential impurities, and counterintuitively along the elongation of the local density-of-state profile of the vortex. Our results provide a useful guide to experiments. The d vectors visualized from QPI and vortex elongation should agree, posing a stringent constraint on the pairing symmetry.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Te3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| CuxBi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| SrxBi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| FeTexSe1-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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