Journal
PHYSICAL REVIEW LETTERS
Volume 119, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.136002
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Funding
- Department of Energy (DOE) [DE-SC0008626]
- National Science Foundation [DMR-1714722]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1604504] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-SC0008626] Funding Source: U.S. Department of Energy (DOE)
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We investigate the large-scale structure of amorphous ices and transitions between their different forms by quantifying their large-scale density fluctuations. Specifically, we simulate the isothermal compression of low-density amorphous ice (LDA) and hexagonal ice to produce high-density amorphous ice (HDA). Both HDA and LDA are nearly hyperuniform; i.e., they are characterized by an anomalous suppression of large-scale density fluctuations. By contrast, in correspondence with the nonequilibrium phase transitions to HDA, the presence of structural heterogeneities strongly suppresses the hyperuniformity and the system becomes hyposurficial (devoid of surface-area fluctuations). Our investigation challenges the largely accepted frozen-liquid picture, which views glasses as structurally arrested liquids. Beyond implications for water, our findings enrich our understanding of pressure-induced structural transformations in glasses.
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