Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Phong, Vo Tien"'
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 energy can be written as \textit{intraband} Berry phases, while Zener tunneling
Externí odkaz:
http://arxiv.org/abs/2407.14670
Autor:
Phong, Vo Tien, Mele, Eugene J.
It is well-known that macroscopically-normalizable zero-energy wavefunctions of spin-$\frac{1}{2}$ particles in a two-dimensional inhomogeneous magnetic field are spin-polarized and exactly calculable with degeneracy equaling the number of flux quant
Externí odkaz:
http://arxiv.org/abs/2310.05913
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
Autor:
Sainz-Cruz, Héctor, Pantaleón, Pierre A., Phong, Vo Tien, Jimeno-Pozo, Alejandro, Guinea, Francisco
Publikováno v:
Phys. Rev. Lett. 131, 016003 (2023)
Junctions provide a wealth of information on the symmetry of the order parameter of superconductors. We analyze junctions between a scanning tunneling microscope (STM) tip and superconducting twisted bilayer graphene (TBG) and TBG Josephson junctions
Externí odkaz:
http://arxiv.org/abs/2211.11389
Autor:
Pantaleon, Pierre A., Jimeno-Pozo, Alejandro, Sainz-Cruz, Hector, Phong, Vo Tien, Cea, Tommaso, Guinea, Francisco
Publikováno v:
Pantaleon et. al. Nature Reviews Physics 5 304-315 (2023)
Twisted bilayer graphene has a rich phase diagram, including superconductivity. Recently, an unexpected discovery has been the observation of superconductivity in non-twisted graphene bilayers and trilayers. In this Perspective, we give an overview o
Externí odkaz:
http://arxiv.org/abs/2211.02880
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
Publikováno v:
Phys. Rev. B 106, L161101 - Published 3 October 2022
We analyze the effects of the long-range Coulomb interaction on the distribution of Berry curvature among the bands near charge neutrality of twisted bilayer graphene (TBG) closely aligned with hexagonal boron nitride (hBN). Due to the suppressed dis
Externí odkaz:
http://arxiv.org/abs/2204.09619
We study the emergence of superconductivity in rhombohedral trilayer graphene due purely to the long-range Coulomb repulsion. This repulsive-interaction-driven phase in rhombohedral trilayer graphene is significantly different from those found in twi
Externí odkaz:
http://arxiv.org/abs/2109.04345
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