%0 Journal Article %1 PhysRevLett.126.236402 %A Jung, Johannes %A Odobesko, Artem %A Boshuis, Robin %A Szczerbakow, Andrzej %A Story, Tomasz %A Bode, Matthias %D 2021 %I American Physical Society %J Phys. Rev. Lett. %K a %N 23 %P 236402 %R 10.1103/PhysRevLett.126.236402 %T Systematic investigation of the coupling between one-dimensional edge states of a topological crystalline insulator %U https://link.aps.org/doi/10.1103/PhysRevLett.126.236402 %V 126 %X The interaction of spin-polarized one-dimensional (1D) topological edge modes localized along single-atomic steps of the topological crystalline insulator $Pb_0.7Sn_0.3Se(001)$ has been studied systematically by scanning tunneling spectroscopy. Our results reveal that the coupling of adjacent edge modes sets in at a step-to-step distance dss≤25  nm, resulting in a characteristic splitting of a single peak at the Dirac point in tunneling spectra. Whereas the energy splitting exponentially increases with decreasing dss for single-atomic steps running almost parallel, we find no splitting for single-atomic step edges under an angle of 90°. The results are discussed in terms of overlapping wave functions with px, py orbital character.

@article{PhysRevLett.126.236402, abstract = {The interaction of spin-polarized one-dimensional (1D) topological edge modes localized along single-atomic steps of the topological crystalline insulator $Pb_{0.7}Sn_{0.3}Se(001)$ has been studied systematically by scanning tunneling spectroscopy. Our results reveal that the coupling of adjacent edge modes sets in at a step-to-step distance dss≤25  nm, resulting in a characteristic splitting of a single peak at the Dirac point in tunneling spectra. Whereas the energy splitting exponentially increases with decreasing dss for single-atomic steps running almost parallel, we find no splitting for single-atomic step edges under an angle of 90°. The results are discussed in terms of overlapping wave functions with px, py orbital character.}, added-at = {2021-08-13T12:13:07.000+0200}, author = {Jung, Johannes and Odobesko, Artem and Boshuis, Robin and Szczerbakow, Andrzej and Story, Tomasz and Bode, Matthias}, biburl = {https://www.bibsonomy.org/bibtex/2c5d95ac59200357ac17dfdc792dbe88a/ctqmat}, day = 11, description = {Phys. Rev. Lett. 126, 236402 (2021) - Systematic Investigation of the Coupling between One-Dimensional Edge States of a Topological Crystalline Insulator}, doi = {10.1103/PhysRevLett.126.236402}, interhash = {cc67527d0eb85da56e66fb0784f408b2}, intrahash = {c5d95ac59200357ac17dfdc792dbe88a}, journal = {Phys. Rev. Lett.}, keywords = {a}, month = jun, number = 23, numpages = {7}, pages = 236402, publisher = {American Physical Society}, timestamp = {2023-10-19T13:33:52.000+0200}, title = {Systematic investigation of the coupling between one-dimensional edge states of a topological crystalline insulator}, url = {https://link.aps.org/doi/10.1103/PhysRevLett.126.236402}, volume = 126, year = 2021 }