Preludes to the Lattice Compatibility Theory LCT: Urbach Tailing Controversial Behavior in Some Nanocompounds

K Boubaker

doi:10.5402/2012/173198

Abstract

We try to give an explanation to the unexpected Urbach tailing associated to some phenomena which occur in some nano-compounds lattices. The provided discussion and notes are detailed here as a prelude to the lattice compatibility theory (LCT), a guide to a plausible understanding of this unsolved intrigue.

Highlights

Urbach tailing alterations inside nanostructured lattices (Figure 1) have been always attributed to atomic-scale topological disorder, unexpected hybrid excitonic transitions, or topological filament occurrence [1,2,3,4]
The Lattice Compatibility Theory LCT refers to the behavior of the doping element intrinsic lattice inside the hosting edifice
In this work we have tried to give a prelude to the Lattice Compatibility Theory (LCT) as an explanative guide for understanding Urbach tailing features inside some nanomaterials

Summary

Introduction

Urbach tailing alterations inside nanostructured lattices (Figure 1) have been always attributed to atomic-scale topological disorder, unexpected hybrid excitonic transitions, or topological filament occurrence [1,2,3,4]. In the beginning of the last decade, Urbach tailing has been attributed to the hydrogen content, and precisely the different E04 and sp contents inside nanofilms [5]. Another more realistic explanation has been provided earlier by Dow and Redfield [6]. This explanation claims that Urbach tailing is due to the broadening of the exciton absorption band which occurs when charged impurities in the lattice induce phononinduced microelectric fields. Last section is a conclusion which summarizes the aim methods and perspectives of the work

Experimental Details and Motivations

Results and Discussion

Conclusion