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| 001 | 1044177 | ||
| 005 | 20250912110200.0 | ||
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| 100 | 1 | _ | |a Bagchi, Mahasweta |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Quasiparticle interference on the surface of Bi 2 Se 3 -terminated (PbSe) 5 ( Bi 2 Se 3 ) 6 |
| 260 | _ | _ | |a Woodbury, NY |c 2025 |b Inst. |
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| 520 | _ | _ | |a Among the family of topological superconductors derived from Bi 2 Se 3 , Cux (PbSe) 5 (Bi 2 Se 3 ) 6 is unique in its surface termination of a single quintuple layer (QL) of the topological insulator (TI) Bi 2 Se 3 on an ordinaryinsulator PbSe. Here, we report a combined scanning tunneling microscopy (STM) and density functional theory (DFT) characterization of the cleaved surface of the parent compound (PbSe)5 (Bi 2 Se 3 ) 6 (PSBS). Interestingly,the potential disorder due to the random distribution of native defects is only ∼ 4 meV, comparable to the smallest reported for TIs. Performing high-resolution quasiparticle interference imaging (QPI) near the Fermienergy (E − EF = −1 to 0.6 eV) we reconstruct the dispersion relation of the dominant spectral feature and our ab initio calculations show that this surface feature originates from two bands with Rashba-like splitting dueto strong spin-orbit coupling and inversion symmetry breaking. Moreover, only a small hexagonal distortion of the calculated Fermi surface is seen in the full momentum space distribution of the measured scattering data.Nevertheless, the scattering pattern at lower energies transforms into a flowerlike shape with suppressed intensity along the K direction. We show that this effect is not due to the forbidden backscattering in the spin-momentumlocked surface state in Bi 2 Se 3 but reflects the threefold symmetry of the scattering potential. |
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| 700 | 1 | _ | |a Rüssmann, Philipp |0 P:(DE-Juel1)157882 |b 1 |u fzj |
| 700 | 1 | _ | |a Bihlmayer, Gustav |0 P:(DE-Juel1)130545 |b 2 |e Corresponding author |
| 700 | 1 | _ | |a Blügel, Stefan |0 P:(DE-Juel1)130548 |b 3 |
| 700 | 1 | _ | |a Ando, Yoichi |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Brede, Jens |0 P:(DE-HGF)0 |b 5 |
| 773 | _ | _ | |a 10.1103/h8v9-sl53 |g Vol. 112, no. 4, p. 045411 |0 PERI:(DE-600)2844160-6 |n 4 |p 045411 |t Physical review / B |v 112 |y 2025 |x 2469-9950 |
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