Zobrazeno 1 - 10
of 259
pro vyhledávání: '"Mele, E. J."'
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, time periodicity of the Bloch Hamiltonian is inherited fro
Externí odkaz:
http://arxiv.org/abs/2401.17368
Autor:
Ezzi, Mohammed M. Al, Pallewela, Gayani N., De Beule, Christophe, Mele, E. J., Adam, Shaffique
By virtue of being atomically thin, the electronic properties of heterostructures built from two-dimensional materials are strongly influenced by atomic relaxation. The atomic layers behave as flexible membranes rather than rigid crystals. Here we de
Externí odkaz:
http://arxiv.org/abs/2401.00498
Autor:
De Beule, Christophe, Mele, E. J.
Publikováno v:
Phys. Rev. Lett. 131, 196603 (2023)
Artificial crystals such as moir\'e superlattices can have a real-space periodicity much larger than the underlying atomic scale. This facilitates the presence of Bloch oscillations in the presence of a static electric field. We demonstrate that the
Externí odkaz:
http://arxiv.org/abs/2305.14532
Publikováno v:
Proc. Natl. Acad. Sci. U.S.A. 120, e2306384120 (2023)
In two-dimensional artificial crystals with large real-space periodicity, the nonlinear current response to a large applied electric field can feature a strong angular dependence, which encodes information about the band dispersion and Berry curvatur
Externí odkaz:
http://arxiv.org/abs/2305.03013
Autor:
Phong, Vo Tien, Mele, E. J.
Publikováno v:
Phys. Rev. Lett. 130, 266601 (2023)
Two-dimensional van der Waals heterostructures can be engineered into artificial superlattices that host flat bands with significant Berry curvature and provide a favorable environment for the emergence of novel electron dynamics. In particular, the
Externí odkaz:
http://arxiv.org/abs/2212.12852
The long-wavelength physics of monolayer graphene in the presence of periodic strain fields has a natural chiral scattering network description. When the strain field varies slowly compared to the graphene lattice and the effective magnetic length of
Externí odkaz:
http://arxiv.org/abs/2209.02554
Autor:
Phong, Vo Tien, Mele, E. J.
Publikováno v:
Phys. Rev. Lett. 128, 176406, Published 29 April 2022
Single-layer graphenes subject to periodic lateral strains are artificial crystals that can support boundary spectra with an intrinsic polarity. These are analyzed by comparing the effects of periodic magnetic fields and strain-induced pseudomagnetic
Externí odkaz:
http://arxiv.org/abs/2108.08414
Non-reciprocal plasmons in current-driven, isotropic, and homogenous graphene with proximal metallic gates is theoretically explored. Nearby metallic gates screen the Coulomb interactions, leading to linearly dispersive acoustic plasmons residing clo
Externí odkaz:
http://arxiv.org/abs/2105.02717
Autor:
Ni, Zhuoliang, Haglund, A. V., Wang, H., Xu, B., Bernhard, C., Mandrus, D. G., Qian, X., Mele, E. J., Kane, C. L., Wu, Liang
Publikováno v:
Nature Nanotechnology 16, 782-787 (2021)
The family of monolayer two-dimensional (2D) materials hosts a wide range of interesting phenomena, including superconductivity, charge density waves, topological states and ferromagnetism, but direct evidence for antiferromagnetism in the monolayer
Externí odkaz:
http://arxiv.org/abs/2104.03069
Autor:
Timmel, Abigail, Mele, E. J.
Publikováno v:
Phys. Rev. B 104, 075419 (2021)
Graphene bilayers with layer antisymmetric strains are studied using the Dirac-Harper model for a pair of single layer Dirac Hamiltonians coupled by a one-dimensional moir\'e-periodic interlayer tunneling amplitude. This model hosts low energy, nearl
Externí odkaz:
http://arxiv.org/abs/2102.11850