Breakthrough in Nanotechnology: Researchers Achieve Phase-Coherent Transport in Cd3As2 Nanowire Devices

Strategic Insights -

Researchers at the Daegu Gyeongbuk Institute of Science and Technology (DGIST) in South Korea have made a significant breakthrough in nanotechnology, achieving phase-coherent transport in suspended long-channel Cd3As2 nanowire devices. The study, published in ACS Applied Electronic Materials, demonstrates the potential of these nanowires for applications in topological quantum devices. By integrating Cd3As2 nanowires with on-chip superconducting LC resonators, the researchers achieved sensitive detection of both resistance and quantum capacitance variations.

Key Takeaways:

  • The researchers demonstrated phase-coherent transport in suspended long-channel Cd3As2 nanowire devices using both direct current (DC) transport and radiofrequency (RF) reflectometry measurements.
  • The study showed clear Fabry-Perot (FP) interference patterns in both DC and RF measurements, providing strong evidence for ballistic electron transport.
  • RF reflectometry revealed gate-dependent modulations of the resonance frequency arising from quantum capacitance oscillations induced by changes in the density of states and FP interference.
  • The researchers demonstrated the versatility of RF reflectometry, establishing its potential for applications in topological quantum devices such as Andreev qubits or gatemon architectures.
  • The study highlights the high quality of the Cd3As2 nanowires and their potential for applications in emerging technologies.
  • Funding for the research was provided by the National Research Foundation of Korea, Ministry of Science, ICT & Future Planning, Republic of Korea, Institute for Information & Communication Technology Planning & Evaluation (IITP), Republic of Korea, NRF, Korean Government.

Statistics:

  • The length of the Cd3As2 nanowire devices used in the study ranged from 1.8 to 730 nm.
  • The research was funded by four organizations for a total amount not specified in the source material.
  • The study employed radiofrequency (RF) reflectometry to detect Fabry-Perot (FP) interference patterns and quantum capacitance oscillations.
  • The research has been peer-reviewed and published in ACS Applied Electronic Materials in 2025.

Sources:

  • "Radio-frequency Detection of Fabry-perot Interference and Quantum Capacitance In Long-channel Three-dimensional Dirac Semimetal Cd 3 as 2 Nanowires." ACS Applied Electronic Materials, 2025.
  • American Chemical Society (ACS). "ACS Applied Electronic Materials." 1155 16TH St, NW, Washington, DC 20036, USA.
  • Minkyung Jung. "Additional information may be obtained from Minkyung Jung, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Dgist Res Inst, Daegu 42988, South Korea."
  • "Investigators from Daegu Gyeongbuk Institute of Science and Technology (DGIST) Zero in on Nanowires (Radio-frequency Detection of Fabry-perot Interference and Quantum Capacitance In Long-channel Three-dimensional Dirac Semimetal ...)." Nanotechnology Weekly. October 20, 2025; p 624.