Place, A.P.M., L.V.H. Rodgers, P. Mundada, B.M. Smitham, M. Fitzpatrick, Z. Leng, A. Premkumar, et al. 2021. “New Material Platform for Superconducting Transmon Qubits With Coherence Times Exceeding 0.3 Milliseconds”. Nature Communications 12 (1779).