Author Affiliations

Bo Xu,^1,* Brendan M. Heffernan,¹ Kyuyoung Bae,² Mark Siemens,³ Juliet T. Gopinath,^1,2,4 and Wounjhang Park^2,4

¹Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

²Department of Electrical, Computer, and Energy Engineering, University of Colorado, Boulder, Colorado 80309, USA

³Department of Physics and Astronomy, University of Denver, 2112 East Wesley Avenue, Denver, Colorado 80308, USA

⁴Materials Science and Energy Engineering, University of Colorado, Boulder, CO 80309, USA

^*Corresponding author: Bo.Xu@colorado.edu