title: Relation between the high density phase and the very-high density phase of amorphous solid water.
abstract: It has been suggested that high-density amorphous (HDA) ice is a structurally arrested form of high-density liquid (HDL) water, while low-density amorphous ice is a structurally arrested form of low-density liquid (LDL) water. Recent experiments and simulations have been interpreted to support the possibility of a second distinct high-density structural state, named very high-density amorphous (VHDA) ice, questioning the LDL-HDL hypothesis. We test this interpretation using extensive computer simulations and find that VHDA is a more stable form of HDA and that, in fact, VHDA should be considered as the amorphous ice of the quenched HDL.
authors.affiliation: Center for Polymer Studies and Department of Physics, Boston University, Boston, Massachusetts 02215, USA.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Giovambattista
authors.forename: H Eugene
authors.initials: HE
authors.lastname: Stanley
authors.forename: Francesco
authors.initials: F
authors.lastname: Sciortino