Berry curvature spectroscopy from Bloch oscillations
C De Beule, EJ Mele - Physical Review Letters, 2023 - APS
Artificial crystals such as moiré superlattices can have a real-space periodicity much larger
than the underlying atomic scale. This facilitates the presence of Bloch oscillations in the …
than the underlying atomic scale. This facilitates the presence of Bloch oscillations in the …
Floquet-Bloch theory for nonperturbative response to a static drive
We develop the Floquet-Bloch theory of noninteracting fermions on a periodic lattice in the
presence of a constant electric field. As long as the field lies along a reciprocal-lattice vector …
presence of a constant electric field. As long as the field lies along a reciprocal-lattice vector …
Optical Absorption and Emission from Wannier-Stark Spectra of Moir\'{e} Superlattices
VT Phong, F Guinea, C Lewandowski - arXiv preprint arXiv:2407.14670, 2024 - arxiv.org
Using a formalism based on the non-Abelian Berry connection, we explore quantum
geometric signatures of Wannier-Stark spectra in two-dimensional superlattices. The Stark …
geometric signatures of Wannier-Stark spectra in two-dimensional superlattices. The Stark …
Elastic screening of pseudo gauge fields in graphene
C De Beule, R Smeyers, WN Luna, EJ Mele… - arXiv preprint arXiv …, 2024 - arxiv.org
Lattice deformations in graphene couple to the low-energy electronic degrees of freedom as
pseudo scalar and gauge fields. Using molecular dynamics simulations, we show that the …
pseudo scalar and gauge fields. Using molecular dynamics simulations, we show that the …