Akhmerov, A. R. 
; Bardarson, J. H. ; Rycerz, A. ; Beenakker, C. W. J.
Alternative Links zum Volltext:DOIVerlag
| Dokumentenart: | Artikel |
|---|
| Titel eines Journals oder einer Zeitschrift: | Physical Review B |
|---|
| Verlag: | AMER PHYSICAL SOC |
|---|
| Ort der Veröffentlichung: | COLLEGE PK |
|---|
| Band: | 77 |
|---|
| Nummer des Zeitschriftenheftes oder des Kapitels: | 20 |
|---|
| Datum: | 2008 |
|---|
| Institutionen: | Physik > Institut für Theoretische Physik |
|---|
| Identifikationsnummer: | | Wert | Typ |
|---|
| 10.1103/PhysRevB.77.205416 | DOI |
|
|---|
| Stichwörter / Keywords: | ELECTRONICS; RIBBONS; |
|---|
| Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 530 Physik |
|---|
| Status: | Veröffentlicht |
|---|
| Begutachtet: | Ja, diese Version wurde begutachtet |
|---|
| An der Universität Regensburg entstanden: | Ja |
|---|
| Dokumenten-ID: | 68188 |
|---|
Zusammenfassung
A potential step in a graphene nanoribbon with zigzag edges is shown to be an intrinsic source of intervalley scattering-no matter how smooth the step is on the scale of the lattice constant a. The valleys are coupled by a pair of localized states at the opposite edges, which act as an attractor and/or repellor for the edge states propagating in valley K/K'. The relative displacement A along the ...
Zusammenfassung
A potential step in a graphene nanoribbon with zigzag edges is shown to be an intrinsic source of intervalley scattering-no matter how smooth the step is on the scale of the lattice constant a. The valleys are coupled by a pair of localized states at the opposite edges, which act as an attractor and/or repellor for the edge states propagating in valley K/K'. The relative displacement A along the ribbon of the localized states determines the conductance G. Our result G = (e(2)/h)[1-cos(N pi+2 pi Delta/3a)] explains why the "valley-valve" effect (the blocking of the current by a p-n junction) depends on the parity of the number N of carbon atoms across the ribbon.
Altmetric