Science 14Feb2020

Engineering Center DMR-142051, the Packard Foundation, and the
Schmidt Fund for Innovative Research. B.A.B. is also supported
by a Guggenheim Fellowship from the John Simon Guggenheim
Memorial Foundation.Author contributions:S.D.H., V.P., Z.-D.S.,
R.Q., and B.A.B. performed the theoretical part of this work. S.D.H.,
V.P., X.H., W.D., and Z.L. designed the samples. V.P., M.S.-G., and
P.E. conducted the experiment. All authors contributed to the

writing of the manuscript.Competing interests:The authors

declare no competing interests.Data and materials availability:

The data shown in this work are available at ( 45 ).

SUPPLEMENTARY MATERIALS

science.sciencemag.org/content/367/6479/797/suppl/DC1

Materials and Methods

Supplementary Text

Figs. S1 to S13

Tables S1 to S7

References ( 46 – 63 )

7 October 2019; accepted 17 January 2020

10.1126/science.aaz7654

Periet al.,Science 367 , 797–800 (2020) 14 February 2020 4of4

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