%0 Journal Article %1 hartl2023probing %A Härtl, Patrick %A Leisegang, Markus %A Kügel, Jens %A Bode, Matthias %B Nano Letters %D 2023 %I American Chemical Society %J Nano Lett. %K a b %N 24 %P 11608--11613 %R 10.1021/acs.nanolett.3c03404 %T Probing spin-dependent ballistic charge transport at dingle-nanometer length scales %U https://doi.org/10.1021/acs.nanolett.3c03404 %V 23 %X The coherent transport of charge and spin is a key requirement of future devices for quantum computing and communication. Scattering at defects or impurities may significantly reduce the coherence of quantum-mechanical states, thereby affecting the device functionality. While numerous methods exist to experimentally assess charge transport, the real-space detection of a material’s ballistic spin transport properties with nanometer resolution remains a challenge. Here we report on a novel approach that utilizes a combination of spin-polarized scanning tunneling microscopy (SP-STM) and the recently introduced molecular nanoprobe (MONA) technique. It relies on the local injection of spin-polarized charge carriers from a magnetic STM tip and their detection by a single surface-deposited phthalocyanine molecule via reversible electron-induced tautomerization events. Based on the particular electronic structure of the Rashba alloy BiAg2, which is governed by a spin-momentum-locked surface state, we prove that the current direction inverses upon tip magnetization reversal.

@article{hartl2023probing, abstract = {The coherent transport of charge and spin is a key requirement of future devices for quantum computing and communication. Scattering at defects or impurities may significantly reduce the coherence of quantum-mechanical states, thereby affecting the device functionality. While numerous methods exist to experimentally assess charge transport, the real-space detection of a material’s ballistic spin transport properties with nanometer resolution remains a challenge. Here we report on a novel approach that utilizes a combination of spin-polarized scanning tunneling microscopy (SP-STM) and the recently introduced molecular nanoprobe (MONA) technique. It relies on the local injection of spin-polarized charge carriers from a magnetic STM tip and their detection by a single surface-deposited phthalocyanine molecule via reversible electron-induced tautomerization events. Based on the particular electronic structure of the Rashba alloy BiAg2, which is governed by a spin-momentum-locked surface state, we prove that the current direction inverses upon tip magnetization reversal.}, added-at = {2024-01-08T10:16:07.000+0100}, author = {Härtl, Patrick and Leisegang, Markus and Kügel, Jens and Bode, Matthias}, biburl = {https://www.bibsonomy.org/bibtex/27e9c079ef6aa0fcec52ca971016c63d7/ctqmat}, booktitle = {Nano Letters}, comment = {doi: 10.1021/acs.nanolett.3c03404}, day = 14, doi = {10.1021/acs.nanolett.3c03404}, interhash = {3ddd04b803b9ace30806b94ad0cc510f}, intrahash = {7e9c079ef6aa0fcec52ca971016c63d7}, issn = {15306984}, journal = {Nano Lett.}, keywords = {a b}, month = {12}, number = 24, pages = {11608--11613}, publisher = {American Chemical Society}, timestamp = {2024-01-08T10:16:32.000+0100}, title = {Probing spin-dependent ballistic charge transport at dingle-nanometer length scales}, url = {https://doi.org/10.1021/acs.nanolett.3c03404}, volume = 23, year = 2023 }