Search Results for author: Giovanni Vignale

Found 3 papers, 0 papers with code

Orbital Hall effect as an alternative to valley Hall effect in gapped graphene

no code implementations4 Mar 2021 Sayantika Bhowal, Giovanni Vignale

In the present work, we show that this phenomenon is better described as an instance of the orbital Hall effect, where the ambiguous "valley" indices are replaced by a physical quantity, the orbital magnetic moment, which can be defined uniformly over the entire Brillouin zone.

Mesoscale and Nanoscale Physics

Gauge invariance and Ward identities in nonlinear response theory

no code implementations8 Feb 2021 Habib Rostami, Mikhail I. Katsnelson, Giovanni Vignale, Marco Polini

We present a formal analysis of nonlinear response functions in terms of correlation functions in real- and imaginary-time domains.

Mesoscale and Nanoscale Physics

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