Electronic and optical properties of graphene- and graphane ... - MIFP

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Bound excitons in 2D systems SiC, Si:H, Ge:H Large oscillator strength � Short radiative lifetime � No possibility of BEC C:H, SiC:H Vanishing dipole matrix element � Not so small radiative lifetime � BEC? SiC, Si:H, Ge:H Large oscillator strength AND � Possible significant RT exciton-polariton effects Large exciton binding energy
Conclusions and outlook • 2D-based SiC and SiC:H: interesting properties + possibilities of integration with Si technology • Side-dependent electronic behaviour in SiC:H � applicability for hole/electrons filters • Strongly bound excitons both in SiC and in SiC:H. Similarities with 2D-C:H, Si:H, Ge:H • Laboratory for studies of fundamental physics, e.g. bosonic effects at room temperature • Possible applications for polaritons lasers
Page 1 and 2: Electronic and optical properties o
Page 3 and 4: c Theoretical tools: ab-initio meth
Page 5 and 6: Quasiparticle equation � � iGW
Page 7 and 8: hn GW BSE Bethe Salpeter equation c
Page 9 and 10: Graphene and graphane-like 2D SiC l
Page 11 and 12: Quasiparticle band structures SiC S
Page 13 and 14: SiC:H band edge density of states T
Page 15 and 16: SiC:H - Electrostatic potential Two
Page 17 and 18: Optical properties (RPA) SiC SiC:H
Page 19 and 20: 2D SiC: first exciton in k-space Ho
Page 21 and 22: 2D SiC:H: first exciton in k-space
Page 23 and 24: Bound excitons in 2D hydrogenated C
Page 25 and 26: With the two limits: 2D Screened Co
Page 27: Log e-h attraction 2D Screened Coul

Electronic and optical properties of graphene- and graphane ... - MIFP

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