Response to comment on “The glassy state of matter: Its definition and ultimate fate”

Edgar D. Zanotto, John Mauro

Research output: Contribution to journalComment/debate

Abstract

The comment by Popov raises two questions related to (a) whether the glassy state can more appropriately be described as metastable or unstable and (b) whether the supercooled liquid state exists below the glass transition temperature, Tg. We argue that the glassy state is thermodynamically unstable, as it continuously and spontaneously relaxes toward the metastable supercooled liquid state at any nonzero temperature. Moreover, the supercooled liquid state—the target for the glass relaxation process—exists at any temperature below the liquidus temperature of a system. There is no problem with having a missing target for the glass relaxation process, since this metastable supercooled liquid state can always be defined.

Original languageEnglish (US)
Pages (from-to)251-252
Number of pages2
JournalJournal of Non-Crystalline Solids
Volume502
DOIs
StatePublished - Dec 15 2018

Fingerprint

Liquids
liquids
Glass
glass
liquidus
Relaxation processes
Temperature
glass transition temperature
temperature
Glass transition temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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abstract = "The comment by Popov raises two questions related to (a) whether the glassy state can more appropriately be described as metastable or unstable and (b) whether the supercooled liquid state exists below the glass transition temperature, Tg. We argue that the glassy state is thermodynamically unstable, as it continuously and spontaneously relaxes toward the metastable supercooled liquid state at any nonzero temperature. Moreover, the supercooled liquid state—the target for the glass relaxation process—exists at any temperature below the liquidus temperature of a system. There is no problem with having a missing target for the glass relaxation process, since this metastable supercooled liquid state can always be defined.",
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Response to comment on “The glassy state of matter : Its definition and ultimate fate”. / Zanotto, Edgar D.; Mauro, John.

In: Journal of Non-Crystalline Solids, Vol. 502, 15.12.2018, p. 251-252.

Research output: Contribution to journalComment/debate

TY - JOUR

T1 - Response to comment on “The glassy state of matter

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AU - Mauro, John

PY - 2018/12/15

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AB - The comment by Popov raises two questions related to (a) whether the glassy state can more appropriately be described as metastable or unstable and (b) whether the supercooled liquid state exists below the glass transition temperature, Tg. We argue that the glassy state is thermodynamically unstable, as it continuously and spontaneously relaxes toward the metastable supercooled liquid state at any nonzero temperature. Moreover, the supercooled liquid state—the target for the glass relaxation process—exists at any temperature below the liquidus temperature of a system. There is no problem with having a missing target for the glass relaxation process, since this metastable supercooled liquid state can always be defined.

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