Announcements of conferences, workshops, schools…
Due to the large number of posts recently, there is currently a delay of several weeks between posts being submitted and the corresponding emails being distributed to all users. Please bear with us while we try to improve this. In the meantime – and until this notice is removed – it would assist us considerably if you could submit only important and/or urgent posts and thus help to reduce the size of the mail queue. Under no circumstances should you resend posts multiple times when you find the emails are not distributed immediately.
In light of the Russian military offensive in Ukraine, we request that announcements relating to events, jobs and other activities associated with institutions supported by the Russian and Belarusian states are not posted to the Psi-k forum.
ETSF online seminar by Alberto Guandalini: Frida ... (No replies)
Back to Event listings...
Arjan Berger
spectroscopic properties of several classes of materials. However, the calculation of the QP band
structure of 2D materials is known to require a very dense BZ sampling. For 2D semiconductors,
large q-point grids are required to describe the sharp q-dependence of the dielectric matrix in the
long-wavelength limit (q → 0). Additionally, 2D Dirac-like systems (e.g. free-standing graphene)
also show peculiar dielectric features originating from the linear dispersion of the bands close to the
Dirac point.
In this talk, I will first describe a new methodology able to drastically improve the convergence of the
QP corrections in 2D semiconductors with respect to the BZ sampling by combininga Monte Carlo integration method
QP band structure. The latter is finally used to calculate electron energy loss spectra (EELS) of
graphene at finite momentum transfer via the Bethe-Salpeter equation (BSE), showing excellent
agreement with recent experimental data provided that the electron-hole interaction is properly
taken into account.