Abstract
This disclosure describes a thermo-orbitronic experimental platform that uses chiral-phonon-induced orbital currents in α-quartz to influence a nearby quantum device, such as a superconducting resonator. The device consists of a Z-cut α-quartz chip patterned with thin tungsten or titanium Hall-bar or stripe structures that reproduce the orbital Seebeck geometry reported in recent literature, where a controlled thermal gradient generates an orbital current via chiral phonons. The quartz device is mounted on a stage that allows a 1–20 K temperature difference across the chip while electrical contacts provide measurement of the orbital current. A separate quantum probe chip, for example a λ/4 coplanar waveguide superconducting resonator on sapphire or silicon, is positioned at a controlled distance on the order of 1–10 µm from the active quartz region. The platform is designed to measure both the orbital current as a function of temperature gradient and any correlated shifts in the resonator's frequency or quality factor, providing a first demonstration of thermo-orbitronic coupling between chiral phonons and a quantum circuit element. The disclosure specifies the device stack, materials, geometries, operating conditions, and a simple analytical expression relating the expected frequency shift to the orbital Seebeck efficiency, thermal gradient, coupling factor, and separation distance. CERN-OHL-P licensed. GCI #75: Thermo-Orbitronic Testbed Using Chiral-Phonon-Induced Orbital Currents in Quartz
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Recommended Citation
Caldwell, Michael Victor Mr., "GCI #75: Thermo-Orbitronic Testbed Using Chiral-Phonon-Induced Orbital Currents in Quartz", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/9388