Samares Kar

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Questions related from Samares Kar

Why in semiconductor crystals smaller lattice constant translates into larger band-gaps?

Consider the following semiconductors with the zinc blende (tetrahedral) crystal structure: BN, InP, InSb, with band-gaps of 6.10, 1.27, and 0.18 eV, respectively; and lattice constants of 0.362,...

03 February 2015 7,085 8 View

Is ionic bond in a crystal stronger or weaker than the covalent bond?

Consider GaAs (covalent crystal) and NaCl (ionic crystal); both have nearly same lattice constant. The Ga-As interatomic distance is shorter than the Na-Cl interatomic distance; but GaAs has a...

03 February 2015 1,177 10 View