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Negative partial density of states in mesoscopic systems | | Urbashi Satpathi
; P. Singha Deo
; | | Date: |
23 Jun 2015 | | Abstract: | Since the experimental observation of quantum mechanical scattering phase
shift in mesoscopic systems, several aspects of it has not yet been understood.
The experimental observations has also accentuated many theoretical problems
related to Friedel sum rule and negativity of partial density of states. We
address these problems using the concepts of Argand diagram and Burgers
circuit. We can prove the possibility of negative partial density of states in
mesoscopic systems. Such a conclusive evidence cannot be given in one
dimension. We can show a general connection between phase drops and exactness
of semi classical Friedel sum rule. We also show Argand diagram for a
scattering matrix element can be of few classes and all observations can be
classified accordingly. | | Source: | arXiv, 1506.6954 | | Services: | Forum | Review | PDF | Favorites | |
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