Quantum Monte Carlo study on excitonic condensation in double graphene electron-hole bilayers

• Grant number: 13/20382-5
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: February 10, 2014
• End date: February 09, 2015
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Francisco Castilho Alcaraz
• Grantee: Braulio Gabriel Alencar Brito
• Supervisor: François Peeters
• Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Institution abroad: University of Antwerp (UA), Belgium
• Associated to the scholarship: 12/16264-4 - Metal atom clusters and crystallization of 2D electron systems at finite temperature, BP.PD

Abstract

In view of recent experimental efforts on double bilayer graphene systems, we will study in this project inter-layer electron-hole pair condensation in graphene bilayers using quantum Monte Carlo (QMC) method. We intend to calculate the excitation gaps, the correlation lengths, and the condensation fractions. It is expected that such simulations can clarify the role of screening effects and importance of the many-body correlations in the excitonic condensation. The proposed QMC calculation will also be significant to test the accuracy of some of the available approximate results within mean field theory. (AU)