Abstract
Hybrid semiconductor–superconductor nanowires are promising candidates as quantum information processing devices. The need for scalability and complex designs calls for the development of selective area growth techniques. Here, the growth of large scale lead telluride (PbTe) networks is introduced by molecular beam epitaxy. The group IV-VI lead-salt semiconductor is an attractive material choice due to its large dielectric constant, strong spin-orbit coupling, and high carrier mobility. A crystal re-orientation process during the initial growth stages leads to single crystalline nanowire networks despite a large lattice mismatch, different crystal structure, and diverging thermal expansion coefficient to the indium phosphide (InP) substrate. The high quality of the resulting material is confirmed by Hall bar measurements, indicating mobilities up to 5600 cm2 (Vs)−1, and Aharonov–Bohm experiments, indicating a low-temperature phase coherence length exceeding 21 µm. Together, these properties show the high potential of the system as a basis for topological networks.
| Original language | English |
|---|---|
| Article number | 2208974 |
| Number of pages | 7 |
| Journal | Advanced Functional Materials |
| Volume | 32 |
| Issue number | 51 |
| DOIs | |
| Publication status | Published - 16 Dec 2022 |
Bibliographical note
Funding Information:J.J. and S.G.S. contributed equally to this work. The authors thank A. Fuhrer and W. Riess for the fruitful discussions. Additional thanks goes to NanoLab@TU/e and the cleanroom operations team of the Binnig and Rohrer Nanotechnology Center (BRNC) for their help and support. This work was supported by the European Research Council (ERC TOCINA 834290). F.N. acknowledges the European Research Council (Grant No. 804273) and the Swiss National Science Foundation (Grant No. 200021_201082). The authors recognize Solliance, a solar energy R&D initiative of ECN, TNO, Holst, TU/e, IMEC and Forschungszentrum Jülich, and the Dutch province of Noord-Brabant for funding the TEM facility.
Funding
J.J. and S.G.S. contributed equally to this work. The authors thank A. Fuhrer and W. Riess for the fruitful discussions. Additional thanks goes to NanoLab@TU/e and the cleanroom operations team of the Binnig and Rohrer Nanotechnology Center (BRNC) for their help and support. This work was supported by the European Research Council (ERC TOCINA 834290). F.N. acknowledges the European Research Council (Grant No. 804273) and the Swiss National Science Foundation (Grant No. 200021_201082). The authors recognize Solliance, a solar energy R&D initiative of ECN, TNO, Holst, TU/e, IMEC and Forschungszentrum Jülich, and the Dutch province of Noord-Brabant for funding the TEM facility. J.J. and S.G.S. contributed equally to this work. The authors thank A. Fuhrer and W. Riess for the fruitful discussions. Additional thanks goes to NanoLab@TU/e and the cleanroom operations team of the Binnig and Rohrer Nanotechnology Center (BRNC) for their help and support. This work was supported by the European Research Council (ERC TOCINA 834290). F.N. acknowledges the European Research Council (Grant No. 804273) and the Swiss National Science Foundation (Grant No. 200021_201082). The authors recognize Solliance, a solar energy R&D initiative of ECN, TNO, Holst, TU/e, IMEC and Forschungszentrum Jülich, and the Dutch province of Noord‐Brabant for funding the TEM facility.
Keywords
- nanowires
- PbTe
- topological quantum computations