Analiza pokretljivosti nosilaca u grafenu na različitim podlogama

master's thesis

• Title (english): Carrier mobility analysis for graphene on different substrates
• Author: Karolina Japec
• Mentor: Mirko Poljak (mentor)
• Committee member: Mirko Poljak (predsjednik povjerenstva)
• Committee member: Marko Koričić (član povjerenstva)
• Committee member: Vladimir Čeperić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2023-07-04, Croatia

Abstract

Obrađuje se pokretljivost i vodljivost nosilaca u grafenu. Nakon što je dan uvod u teoriju poluklasičnog transporta u grafenu, opisani su dominantni mehanizmi raspršenja nosilaca. Uzimajući u obzir dominantne mehanizme raspršenja, u MATLAB-u je implementiran numerički simulator sa skriptama: učestalost raspršenja u ovisnosti o kinetičkoj energiji, pokretljivost u ovisnosti o koncentraciji nosilaca, koncentracija nosilaca u ovisnosti o naponu na upravljačkoj elektrodi te vodljivost u ovisnosti o naponu na upravljačkoj elektrodi. U konačnici, analiziran je utjecaj kvalitete podloge (koncentracije ioniziranih primjesa na podlozi te efektivna visina korugacija) na pokretljivost nosilaca i vodljivost grafena.

Abstract (english)

Carrier mobility and conductivity of graphene are calculated and analyzed in this work. An introduction to the theory of semiclassical transport in graphene is given and all dominant scattering mechanisms are described. Considering the dominant scattering mechanisms, a numerical simulator was implemented in MATLAB. The simulator contains the following MATLAB scripts: calculation of scattering rates depending on the kinetic energy, mobility depending on the carrier density, carrier density and conductivity depending on the gate voltage. Finally, the influence of the quality of the substrate (density of impurities and rms height for the corrugations) on carrier mobility and conductivity of graphene was analyzed.

• Keywords: grafen; poluklasični transport; raspršenja; učestalost raspršenja; pokretljivost; vodljivost; kvaliteta podloge
• Keywords (english): graphene; semiclassical transport; scattering; scattering rate; mobility; conductivity; substrate quality
• Language: croatian
• URN:NBN: urn:nbn:hr:168:616648
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-10-11 09:08:22