Image-potential band-gap narrowing at a metal/semiconductor interface

Direct band gap narrowing in highly doped Ge

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Full Band Atomistic Modeling of Homo-junction InGaAs Band-to-Band Tunneling Diodes Including Band Gap Narrowing

A homo-junction In0.53Ga0.47As tunneling diode is investigated using full-band, atomistic quantum transport approach based on a tight-binding model (TB) and the Non-equilibrium Green’s Function formalism. Band gap narrowing (BGN) is included in TB by altering its parameters using the Jain-Roulston model. BGN is found to be critical in the determination of the current peak and the second turn-on...

Surface Gap Solitons at a Nonlinearity Interface

We demonstrate existence of waves localized at the interface of two nonlinear periodic media with different coefficients of the cubic nonlinearity via the one-dimensional Gross–Pitaevsky equation. We call these waves the surface gap solitons (SGS). In the case of smooth symmetric periodic potentials, we study analytically bifurcations of SGS’s from standard gap solitons and determine numericall...

Narrowing the gap.

Since 1981 AIDS has illuminated, like a roving searchlight, a series of ethical questions, which extend far beyond the apparently narrow limits of one disease. It has revealed, one by one, human attitudes and behaviours that were previously unquestioned, or unobserved based on unidentified but shaky pre-suppositions. This commentary oVers two contrasting perspectives on the problems facing deve...

Narrowing the Nutrition Gap: