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Energy-Dependent Chirality Effects in Quasifree-Standing Graphene (CROSBI ID 237396)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Dombrowski, Daniela ; Jolie, Wouter ; Petrović, Marin ; Runte, Sven ; Craes, Fabian ; Klinkhammer, Jürgen ; Kralj, Marko ; Lazić, Predrag ; Sela, Eran ; Busse, Carsten Energy-Dependent Chirality Effects in Quasifree-Standing Graphene // Physical review letters, 118 (2017), 11; 116401, 6. doi: 10.1103/PhysRevLett.118.116401

Podaci o odgovornosti

Dombrowski, Daniela ; Jolie, Wouter ; Petrović, Marin ; Runte, Sven ; Craes, Fabian ; Klinkhammer, Jürgen ; Kralj, Marko ; Lazić, Predrag ; Sela, Eran ; Busse, Carsten

engleski

Energy-Dependent Chirality Effects in Quasifree-Standing Graphene

We present direct experimental evidence of broken chirality in graphene by analyzing electron scattering processes at energies ranging from the linear (Dirac-like) to the strongly trigonally warped region. Furthermore, we are able to measure the energy of the van Hove singularity at the M point of the conduction band. Our data show a very good agreement with theoretical calculations for free-standing graphene. We identify a new intravalley scattering channel activated in case of a strongly trigonally warped constant energy contour, which is not suppressed by chirality. Finally, we compare our experimental findings with T-matrix simulations with and without the presence of a pseudomagnetic field and suggest that higher order electron hopping effects are a key factor in breaking the chirality near to the van Hove singularity.

graphene ; intercalation ; chirality ; electron scattering ; STM ; STS

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Podaci o izdanju

118 (11)

2017.

116401

6

objavljeno

0031-9007

1079-7114

10.1103/PhysRevLett.118.116401

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Fizika

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