7 papers
Growth optimization of shallow Ge quantum wells grown by molecular beam epitaxy
J. T. Dong, J. P. Thompson, R. Card +2
Shallow strained Ge quantum wells have gained recent attention for realizing scalable, high-performance hybrid superconductor/semiconductor-based qubits. Epitaxial superconducting…
Voltage-tunable Josephson Junctions on Germanium Quantum Wells with in-situ Aluminum Contacts
Joshua P. Thompson, Jason T. Dong, Bernardo Langa +12
Voltage-tunable Josephson junctions (VT-JJs) are an emerging element in superconducting quantum electronics with potential to expand the functionality of conventional designs. Whil…
Piezoelectric resonators in thin-film barium titanate from room temperature to millikelvin
Hao Tian, Shu-Yuan Chang, Nuha Akhtar +2
Ferroelectric materials, with their strong nonlinearities, underpin key technologies across radio-frequency (RF) signal processing, optical communications, and emerging quantum sys…
Anharmonicity and Charge-Noise Sensitivity of Fraunhofer Qubit
Longyu Ma, Tony Liu, Javad Shabani +3
We present a theory of a flux-tunable superconducting qubit, the "Fraunhofer qubit," based on the Fraunhofer interference in a wide ballistic Josephson junction. As magnetic flux t…
An evaluation of A15 Nb3Al superconducting thin films for application in quantum circuits
Joseph Falvo, Brooke Henry, Bernardo Langa +4
A15 superconductors are distinguished by their high critical temperatures, magnetic fields, and current-carrying capabilities. Among them, NbAl is of particular interest for su…
Superconductivity in tin telluride films grown by molecular beam epitaxy
Antonio Gonzalez, Samuel J. Poage, Bernardo Langa +7
The intersection of superconductivity and ferroelectricity hosts a wide range of exotic quantum phenomena. Here, we report on the observation of superconductivity in high-quality t…