| Autor: |
Shuichi Iwakiri, Jakob Miller, Florian Lang, Jakob Prettenthaler, Takashi Taniguchi, Kenji Watanabe, Sung Sik Lee, Pascal Becker, Detlef Günther, Thomas Ihn, Klaus Ensslin |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Physical Review Research, Vol 5, Iss 4, p 043212 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2643-1564 |
| DOI: |
10.1103/PhysRevResearch.5.043212 |
| Popis: |
Graphene quantum dots are promising candidates for qubits due to weak spin-orbit and hyperfine interactions. The hyperfine interaction, controllable via isotopic purification, could be the key to further improving the coherence. Here, we use isotopically enriched graphite crystals of both ^{12}C and ^{13}C grown by a high-pressure-high-temperature method to exfoliate graphene layers. We fabricated Hall bar devices and performed quantum transport measurements, revealing mobilities exceeding 10^{5}cm^{2}/Vs and a long mean free path of microns, which are as high as natural graphene. Shubnikov–de Haas oscillations, quantum Hall effect up to the filling factor of one, and Brown-Zak oscillations due to the alignment of hBN and graphene are observed thanks to the high mobility. These results constitute a material platform for physics and engineering of isotopically enriched graphene qubits. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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