1.

Record Nr.

UNINA9910254610003321

Autore

Van Tuan Dinh

Titolo

Charge and Spin Transport in Disordered Graphene-Based Materials / / by Dinh Van Tuan

Pubbl/distr/stampa

Cham : , : Springer International Publishing : , : Imprint : Springer, , 2016

ISBN

3-319-25571-1

Edizione

[1st ed. 2016.]

Descrizione fisica

1 online resource (162 p.)

Collana

Springer Theses, Recognizing Outstanding Ph.D. Research, , 2190-5053

Disciplina

546.681

Soggetti

Nanoscale science

Nanoscience

Nanostructures

Optical materials

Electronic materials

Materials—Surfaces

Thin films

Nanoscale Science and Technology

Optical and Electronic Materials

Surfaces and Interfaces, Thin Films

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia

Note generali

"Doctoral Thesis accepted by Autonomous University of Barcelona, Spain."

Nota di bibliografia

Includes bibliographical references at the end of each chapters.

Nota di contenuto

Introduction -- Electronic and Transport Properties of Graphene -- The Real Space Order O(N) Transport Formalism -- Transport in Disordered Graphene -- Spin Transport in Disordered Graphene -- Conclusions.

Sommario/riassunto

This thesis presents an in-depth theoretical analysis of charge and spin transport properties in complex forms of disordered graphene. It relies on innovative real space computational methods of the time-dependent spreading of electronic wave packets. First a universal scaling law of the elastic mean free path versus the average grain size is predicted for polycrystalline morphologies, and charge mobilities of up to 300.000 cm2/V.s are determined for 1 micron grain size, while amorphous graphene membranes are shown to behave as Anderson insulators. An



unprecedented spin relaxation mechanism, unique to graphene and driven by spin/pseudospin entanglement is then reported in the presence of weak spin-orbit interaction (gold ad-atom impurities) together with the prediction of a crossover from a quantum spin Hall Effect to spin Hall effect (for thallium ad-atoms), depending on the degree of surface ad-atom segregation and the resulting island diameter.