• C12, a French developer of carbon nanotube (CNT) based quantum electronics, has co-authored a study inNature Communicationsdemonstrating an electrically controlled metal-insulator transition in ultra-clean, suspended carbon nanotubes. • The research showcases an energy gap that is tunable over nearly two orders of magnitude (200 μeV to 30 meV), validating C12’s “materials-first” strategy. • By proving that high-purity nanotubes can exhibit predictable and controllable electronic behavior, the team has established a crucial foundation for building scalable, low-disorder spin-qubit architectures. • The experiment utilized a unique 15-gate “keyboard” architecture, where a 4-micrometer nanotube is suspended approximately 150 nm above a series of individually controlled palladium electrodes. • By spatially modulating the local electrical potential-applying alternating voltages across the gates-the researchers induced a synthetic “charge density wave.” This mechanism mimics the Peierls transition found in complex condensed matter systems, effectively driving the nanotube from a metallic state to an insulating state. • The study found that a minimum of seven modulated gates is required to develop a robust, clear energy gap, which remains stable against local perturbations.
Article Summaries:
- C12, a French developer of carbon nanotube (CNT) based quantum electronics, has co-authored a study in Nature Communications demonstrating an electrically controlled metal-insulator transition in ultra-clean, suspended carbon nanotubes. The research showcases an energy gap that is tunable over nearly two orders of magnitude (200 μeV to 30 meV), validating C12’s “materials-first” strategy. By proving that high-purity nanotubes can exhibit predictable and controllable electronic behavior, the team has established a crucial foundation for building scalable, low-disorder spin-qubit architectures.
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