Structural considerations about the (Ge0.25Se0.75)100−xAgx glasses

Piarristeguy, Andréa; Fontana, M.; Arcondo, B.

doi:10.1016/j.jnoncrysol.2003.09.011

Cited by 22 publications

(38 citation statements)

References 33 publications

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“…Pre-peak intensity decreases with Ag content, as it is shown in Fig. 1 and previous works [10,11]. This behavior is also observed in Ag-Ge-Se bulk glasses.…”

Section: Resultssupporting

confidence: 85%

Raman spectroscopy of chalcogenide thin films prepared by PLD

Erazú

Rocca

Fontana

et al. 2010

Journal of Alloys and Compounds

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“…Pre-peak intensity decreases with Ag content, as it is shown in Fig. 1 and previous works [10,11]. This behavior is also observed in Ag-Ge-Se bulk glasses.…”

Section: Resultssupporting

confidence: 85%

Raman spectroscopy of chalcogenide thin films prepared by PLD

Erazú

Rocca

Fontana

et al. 2010

Journal of Alloys and Compounds

Self Cite

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“…The average bond length and average coordination number closely agree with the available data. 12 With increasing Ag concentration, the average coordination number increases to 2.8 in g-͑GeSe 3 ͒ 0.85 Ag 0.15 from 2.51 in g-GeSe 3 . 32 Also listed is the second-nearest-neighbor distance.…”

Section: A Short-range Order and Defectsmentioning

confidence: 92%

“…The size of the cubic cells was chosen to make the density of these glasses close to experimental data. The box size of the 240 atom supercell of ͑GeSe 3 ͒ 0.90 Ag 0.10 and ͑GeSe 3 ͒ 0.85 Ag 0.15 are respectively 18.601 Å and 18.656 Å with corresponding density 12 4.98 g / cm 3 and 5.03 g / cm 3 . The structures were annealed and we obtained well-thermalized melts at 4800 K. We took three steps to cool the cells.…”

Section: B Model Formationmentioning

confidence: 99%

“…Although the mobile ions in amorphous materials have been studied 10 their detailed dynamics in amorphous hosts still constitutes one of the unsolved problems of solid state ionics. The structure of Ge-Se-Ag glass has been investigated using several experimental methods, including x-ray diffraction, 11,12 neutron diffraction with isotopic substitution, 13 extended x-rayabsorption fine structure ͑EXAFS͒, 14 differential anomalous x-ray scattering [15][16][17] ͑DAS͒ and modulated differential scan-ning calorimetry ͑MDSC͒, and Raman spectroscopy. 7,8 Despite this impressive database, the structure of the ternary Ge-Se-Ag glasses has not yet been completely determined.…”

Section: Introductionmentioning

confidence: 99%

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Silver transport inGexSe1−x:Agmaterials:Ab initiosimulation of a solid electrolyte

2005

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In this paper, we present models of Ge-Se glasses heavily doped with Ag obtained from ab initio simulation and study the dynamics of the network with an emphasis on the motion of Ag + ions. The models are analyzed with partial pair correlation functions, static structure factors, and novel wavelet techniques. The electronic properties are characterized by the electronic density of states and analysis of specific electronic eigenstates. As Ag content increases, the optical band gap increases. Ag diffusion is observed directly from thermal simulation. The most diffusive Ag + ions move preferentially through low density regions of the network and the existence of well-defined trapping centers is confirmed. Preliminary information about temperature dependence of trapping and release is provided.

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“…direct synthesis from pure elements or compounds in evacuated ampoules [6,14,15] by deposited thin metal layer step-by-step on the top of the chalcogenide host [5][6][7][8]. In all cases, either homogeneous or phase separated [16][17][18][19] glasses are obtained depending on the metal content.…”

Section: Introductionmentioning

confidence: 99%