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ACKNOWLEDGMENTS

We acknowledge helpful input from A. Kolmakov and R. Schrimpf

and stimulating discussions with S. Pantelides, S. Creager,

R. Karnik, P. N. Pintauro, J. A. Hart, C. Payne, E. Balkin, and

D. Matuszak.Funding:P.R.K. acknowledges funding from NSF

CAREER award 1944134 and 2020-2021 ECS-Toyota Young

Investigator Fellowship.Author contributions:P.R.K. wrote the

paper with input from P.C. and N.K.M. N.K.M. and P.C. made

the figures, contributed to discussions and writing. P.C. and N.K.M.

contributed equally.Competing interests:P.R.K. acknowledges

a stake in a company aimed at commercializing 2D materials

with patents awarded and pending.Data and materials availability:

References to all data are provided in the manuscript.

10.1126/science.abd7687

Kidambiet al.,Science 374 , eabd7687 (2021) 5 November 2021 12 of 12

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