| Zugriffsnummer | 52883 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Quantum Hall resistance standards based on epitaxial Graphene with different doping layer sequence |
| Autor(in); Institution |
Götz, Martin; 2.1, Gleichstrom und Niederfrequenz, PTB-Braunschweig
|
| Quelle/Jahr | 2024 Conference on Precision Electromagnetic Measurements (CPEM):(2024) |
| ISSN | 2160-0171 (online) ; 0589-1485 (PoD) |
| ISBN | 979-8-3503-6104-9 (online) ; 979-8-3503-6105-6 (PoD) |
| Verlag | Piscataway, NJ: IEEE |
| Konferenzangaben | Conference on Precision Electromagnetic Measurements CPEM 2024, Denver, Colo., 08-12, July, 2024, USA |
| Freie Schlagworte | Resistance standards ; epitaxial graphene ; quantum Hall effect ; metrology |
| Zusammenfassung | Epitaxial graphene-based quantum Hall resistance standards (QHRS) can be operated at relaxed working conditions compared to conventional GaAs heterostructure devices. To reach the desired magnetic field working point, exact and reliable control of the charge carrier density of graphene plays a crucial role. This can be achieved by post-growth deposition of F4-TCNQ molecular dopants embedded within a polymer host layer. Here, we investigate QHRS with different sequences of such doping and undoped spacer layers to find a structure that is as simple and optimal as possible. By high-accuracy resistance measurements we found excellent metrological quality for all types of devices in a broad magnetic field range starting at 5 T and at 4.2 K. The resistance quantization is maintained over two years, so far, which gives further confidence in the robustness and long-term stability of such molecular-doped graphene-based QHRS. |
| Themenbereich der Metrologie | Elektrizität und Magnetismus |
| Forschungsprojekt | Deutsche Forschungsgemeinschaft (DFG) Projects No. Pi385/3-1 within the FOR5242 research unit (FV-25034), DFG Germany’s Excellence Strategy–EXC-2123 QuantumFrontiers-No. 390837967. |
| Förderinformationen (1) |
Förderername: Deutsche Forschungsgemeinschaft (DFG)
Förderer ID: 0000 0001 2096 9829 Förderer ID Typ: ISNI Förderprogramm: Pi385/3-1 within the FOR5242 research unit (FV-25034), DFG Germany's Excellence Strategy-EXC-2123 QuantumFrontiers Förderungsnummer: 390837967 |
Zitierung
Yin, Y., Kruskopf, M., Chatterjee, A., Bauer, S., Tschirner, T., Götz, M., Hohls, F., Pierz, K., & Schumacher, H. W. (2024). Quantum Hall resistance standards based on epitaxial Graphene with different doping layer sequence. Conference on Precision Electromagnetic Measurements CPEM 2024, Denver, Colo., 08-12, July, 2024, USA.