Analysis of glass forming ability using percolation concept and tunability of physical parameters of a-Ge12Se76 – xAs12Bix glassy semiconductors

Sharma, I.; Sunder, S.

doi:10.1515/msp-2018-0006

Artykuł - szczegóły

Tytuł artykułu

Analysis of glass forming ability using percolation concept and tunability of physical parameters of a-Ge12Se76 – xAs12Bix glassy semiconductors

Autorzy

Sharma I. , Sunder S.

Wybrane pełne teksty z tego czasopisma

Identyfikatory

DOI

10.1515/msp-2018-0006

Warianty tytułu

Języki publikacji

Abstrakty

Glass forming ability of lone-pair semiconductors was analyzed for (x = 0, 2, 4, 6, 8, 10) system. Values of lone pair electrons L were calculated using average coordination number of valence electrons. These values were found to decrease, as the system was moving towards the rigid region. L > 3 values showed vitreous state. Deviation of the stoichiometry confirmed the chalcogen-rich region. A linear correlation was found between the mean bond energy and glass transition temperature. Chemical Bond Approach model was applied to calculate the cohesive energy of the system. A linear relationship was found to exist between the cohesive energy and the theoretical band gap, calculated using Shimakawa relation. A decrease in both parameters was explained on the basis of average stabilization energy and electronegativity of the system. The density values were found to increase and may account for higher refractive index of the system. Large Bohr radius of the Bi atom accounted for an increase in the polarizability. Other parameters viz. degree of covalency, packing density, compactness, molar volume, free volume percentage, excess volume and polaron radius were also calculated. An effort was made to correlate the effect of Bi addition to Ge₁₂Se_{76 – x}As₁₂Bi_x lone-pair semiconductor on the basis of the structure of the glassy matrix or the connectedness of the material.

Słowa kluczowe

constraints glass transition temperature band gap cohesive Energy

Wydawca

De Gruyter

Czasopismo

Materials Science Poland

Rocznik

2018

Tom

Vol. 36, No. 2

Strony

242--254

Opis fizyczny

Bibliogr. 58 poz., rys., tab.

Twórcy

autor

Sharma I.

ishuphy@gmail.com

Department of Physics, Amity University Dubai, Dubai International Academic City, United Arab Emirates

autor

Sunder S.

Department of Physics, Amity University Dubai, Dubai International Academic City, United Arab Emirates

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-04002f53-803f-44a9-8824-56ffa8a3543a