Pressure-induced crystallization of vitreous<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">ZnCl</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Polsky, Cynthia H.; Leinenweber, Kurt; Verhelst, Mary A.; Angell, C. Austen; Wolf, George H.

doi:10.1103/physrevb.61.5934

Cited by 33 publications

(16 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In real space, sharper first peaks are observed for GeO 2 compared with ZnCl 2 (see Fig. 2), in keeping with the higher vibrational frequencies observed in Raman spectroscopy experiments [21,22]. Structural differences also appear on the intermediate range r=r AX 1:4-4 where r AX is the separation of unlike nearest neighbors.…”

supporting

confidence: 72%

Glass Fragility and Atomic Ordering on the Intermediate and Extended Range

et al. 2006

View full text Add to dashboard Cite

The relation between the fragility of glass-forming systems, a parameter which describes many of their key physical characteristics, and atomic scale structure is investigated by using neutron diffraction to measure the topological and chemical ordering for germania, or GeO(2), which is an archetypal strong glass former. We find that the ordering for this and other tetrahedral network-forming glasses at distances greater than the nearest neighbor can be rationalized in terms of an interplay between the relative importance of two length scales. One of these is associated with an intermediate range, the other with an extended range and, with increasing glass fragility, it is the extended range ordering which dominates.

show abstract

supporting

confidence: 72%

Glass Fragility and Atomic Ordering on the Intermediate and Extended Range

et al. 2006

View full text Add to dashboard Cite

show abstract

“…1 Our model reproduces the high-pressure form of the amorphous structure which is in excellent agreement with the experiment, 10 but, contrary to the study of Grande et al 9 and Prasad et al 12 It was shown that a-GeS 2 is crystallized at 873 K and densified at 543 K. 23 In a recent study, pressure-induced crystallization of vitreous ZnCl 2 was re-ported at room temperature but, there is a transition to a HDA at low temperature. 24 The crystallization of an amorphous phase may be inhibited at low temperature and an amorphous-to-amorphous transition is favorable.…”

Section: A Pressure Dependence Of Volumementioning

confidence: 99%

Simulation of pressure-induced polyamorphism in a chalcogenide glassGeSe2

Durandurdu

Drabold

2002

Phys. Rev. B

View full text Add to dashboard Cite

The pressure-induced insulator-metal transition in amorphous GeSe 2 (a-GeSe 2 ) is studied using an ab initio constant pressure molecular-dynamic simulation. a-GeSe 2 transforms gradually to an amorphous metallic state under the application of pressure. The transition is reversible, and is associated with a gradual change from fourfold to sixfold Ge coordination, and from twofold to fourfold Se coordination. Pressure reduces the occurrence of chemical disorder up to 13 GPa. It is found that the optical gap decreases gradually, and the highly localized electronic and vibrational states of the glass at zero-pressure become extended with an increase of the pressure.

show abstract

“…A similar interpretation had also been suggested for the pressure-induced crystallization of glassy ZnCl 2 . 4 An interesting consequence of this polyamorphic phase transition scenario is that the spinodal of coexistence between the LDA (i.e., the a-GaSb phase) and the HDA phases is expected to terminate at a critical point that is located somewhere below the liquidus lines (Fig. 3).…”

Section: Resultsmentioning

confidence: 99%

Nature of metastable amorphous-to-crystalline reversible phase transformations in GaSb

Kalkan¹,

Edwards²,

Raoux³

et al. 2013

The Journal of Chemical Physics

View full text Add to dashboard Cite

The structural, thermodynamic, and kinetic aspects of the transformations between the metastable amorphous and crystalline phases of GaSb are investigated as a function of pressure at ambient temperature using synchrotron x-ray diffraction experiments in a diamond anvil cell. The results are consistent with the hypothesis that the pressure induced crystallization of amorphous GaSb into the β-Sn crystal structure near ~5 GPa is possibly a manifestation of an underlying polyamorphic phase transition between a semiconducting, low density and a metallic, high density amorphous (LDA and HDA, respectively) phases. In this scenario, the large differences in the thermal crystallization kinetics between amorphous GaSb deposited in thin film form by sputtering and that prepared by laser melt quenching may be related to the relative location of the glass transition temperature of the latter in the pressure-temperature (P-T) space with respect to the location of the critical point that terminate the LDA ↔ HDA transition. The amorphous → β-Sn phase transition is found to be hysteretically reversible as the β-Sn phase undergoes decompressive amorphization near ~2 GPa due to the lattice instabilities that give rise to density fluctuations in the crystal upon decompression.

show abstract

Pressure-induced crystallization of vitreousZnCl2

Cited by 33 publications

References 33 publications

Glass Fragility and Atomic Ordering on the Intermediate and Extended Range

Glass Fragility and Atomic Ordering on the Intermediate and Extended Range

Simulation of pressure-induced polyamorphism in a chalcogenide glassGeSe2

Nature of metastable amorphous-to-crystalline reversible phase transformations in GaSb

Contact Info

Product

Resources

About