article published yes Georgios Katsaros author 38DB5788-F248-11E8-B48F-1D18A9856A870000-0001-8342-202X Josip Kukucka author 3F5D8856-F248-11E8-B48F-1D18A9856A87 Lada Vukušić author 31E9F056-F248-11E8-B48F-1D18A9856A870000-0003-2424-8636 Hannes Watzinger author 35DF8E50-F248-11E8-B48F-1D18A9856A87 Fei Gao author Ting Wang author 0000-0002-4619-9575 Jian-Jun Zhang author Karsten Held author GeKa department Towards scalable hut wire quantum devices project TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS project Using inelastic cotunneling spectroscopy we observe a zero field splitting within the spin triplet manifold of Ge hut wire quantum dots. The states with spin ±1 in the confinement direction are energetically favored by up to 55 μeV compared to the spin 0 triplet state because of the strong spin–orbit coupling. The reported effect should be observable in a broad class of strongly confined hole quantum-dot systems and might need to be considered when operating hole spin qubits. https://research-explorer.ista.ac.at/download/8203/8204/2020_NanoLetters_Katsaros.pdf application/pdfno American Chemical Society2020 eng 1530-6984 1530-6992 32479090 00054889320006610.1021/acs.nanolett.0c01466 2075201-5206 https://research-explorer.ista.ac.at/record/7689 Katsaros G, Kukucka J, Vukušić L, et al. Zero field splitting of heavy-hole states in quantum dots. <i>Nano Letters</i>. 2020;20(7):5201-5206. doi:<a href="https://doi.org/10.1021/acs.nanolett.0c01466">10.1021/acs.nanolett.0c01466</a> Katsaros, Georgios, et al. “Zero Field Splitting of Heavy-Hole States in Quantum Dots.” <i>Nano Letters</i>, vol. 20, no. 7, American Chemical Society, 2020, pp. 5201–06, doi:<a href="https://doi.org/10.1021/acs.nanolett.0c01466">10.1021/acs.nanolett.0c01466</a>. G. Katsaros <i>et al.</i>, “Zero field splitting of heavy-hole states in quantum dots,” <i>Nano Letters</i>, vol. 20, no. 7. American Chemical Society, pp. 5201–5206, 2020. Katsaros, G., Kukucka, J., Vukušić, L., Watzinger, H., Gao, F., Wang, T., … Held, K. (2020). Zero field splitting of heavy-hole states in quantum dots. <i>Nano Letters</i>. American Chemical Society. <a href="https://doi.org/10.1021/acs.nanolett.0c01466">https://doi.org/10.1021/acs.nanolett.0c01466</a> Katsaros G, Kukucka J, Vukušić L, Watzinger H, Gao F, Wang T, Zhang J-J, Held K. 2020. Zero field splitting of heavy-hole states in quantum dots. Nano Letters. 20(7), 5201–5206. Katsaros, Georgios, Josip Kukucka, Lada Vukušić, Hannes Watzinger, Fei Gao, Ting Wang, Jian-Jun Zhang, and Karsten Held. “Zero Field Splitting of Heavy-Hole States in Quantum Dots.” <i>Nano Letters</i>. American Chemical Society, 2020. <a href="https://doi.org/10.1021/acs.nanolett.0c01466">https://doi.org/10.1021/acs.nanolett.0c01466</a>. G. Katsaros, J. Kukucka, L. Vukušić, H. Watzinger, F. Gao, T. Wang, J.-J. Zhang, K. Held, Nano Letters 20 (2020) 5201–5206. 82032020-08-06T09:25:04Z2025-04-15T08:39:16Z