Zobrazeno 1 - 10
of 329
pro vyhledávání: '"Velasco JR"'
A quantum eigenstate of a classically chaotic system is referred as scarred by an unstable periodic orbit if its probability density is concentrated in the vicinity of that orbit. Recently, a new class of scarring - variational scarring - was discove
Externí odkaz:
http://arxiv.org/abs/2410.13157
Autor:
Ge, Zhehao, Graf, Anton M., Keski-Rahkonen, Joonas, Slizovskiy, Sergey, Polizogopoulos, Peter, Taniguchi, Takashi, Watanabe, Kenji, Van Haren, Ryan, Lederman, David, Fal'ko, Vladimir I., Heller, Eric J., Velasco Jr, Jairo
Quantum scars refer to eigenstates with enhanced probability density along unstable classical periodic orbits (POs). First predicted 40 years ago, scars are special eigenstates that counterintuitively defy ergodicity in quantum systems whose classica
Externí odkaz:
http://arxiv.org/abs/2409.10675
Autor:
Czap, Gregory, Noh, Kyungju, Velasco Jr., Jairo, Macfarlane, Roger M., Brune, Harald, Lutz, Christopher P.
Lanthanide atoms show long magnetic lifetimes because of their strongly localized 4f electrons, but electrical control of their spins has been difficult because of their closed valence shell configurations. We achieved electron spin resonance of indi
Externí odkaz:
http://arxiv.org/abs/2408.11335
Autor:
Ge, Zhehao, Slizovskiy, Sergey, Polizogopoulos, Peter, Joshi, Toyanath, Taniguchi, Takashi, Watanabe, Kenji, Lederman, David, Fal'ko, Vladimir I., Velasco Jr, Jairo
Massless Dirac fermions have been observed in various materials such as graphene and topological insulators in recent years, thus offering a solid-state platform to study relativistic quantum phenomena. Single quantum dots (QDs) and coupled QDs forme
Externí odkaz:
http://arxiv.org/abs/2210.14256
Autor:
Ge, Zhehao, Wong, Dillon, Lee, Juwon, Joucken, Frederic, Quezada-Lopez, Eberth A., Kahn, Salman, Tsai, Hsin-Zon, Taniguchi, Takashi, Watanabe, Kenji, Wang, Feng, Zettl, Alex, Crommie, Michael F., Velasco Jr, Jairo
Publikováno v:
Nano Letters 2021
Experimental realization of graphene-based stadium-shaped quantum dots (QDs) have been few and incompatible with scanned probe microscopy. Yet, direct visualization of electronic states within these QDs is crucial for determining the existence of qua
Externí odkaz:
http://arxiv.org/abs/2207.05938
Autor:
Joucken, Frédéric, Davenport, John L., Ge, Zhehao, Quezada-Lopez, Eberth A., Taniguchi, Takashi, Watanabe, Kenji, Velasco Jr., Jairo, Lagoute, Jérôme, Kaindl, Robert A.
Machine learning (ML) methods are extraordinarily successful at denoising photographic images. The application of such denoising methods to scientific images is, however, often complicated by the difficulty in experimentally obtaining a suitable expe
Externí odkaz:
http://arxiv.org/abs/2206.08951
Autor:
Balgley, Jesse, Butler, Jackson, Biswas, Sananda, Ge, Zhehao, Lagasse, Samuel, Taniguchi, Takashi, Watanabe, Kenji, Cothrine, Matthew, Mandrus, David G., Velasco Jr., Jairo, Valentí, Roser, Henriksen, Erik A.
We demonstrate ultra-sharp (${\lesssim}\,10\text{ nm}$) lateral $p\text{-}n$ junctions in graphene using electronic transport, scanning tunneling microscopy, and first principles calculations. The $p\text{-}n$ junction lies at the boundary between di
Externí odkaz:
http://arxiv.org/abs/2203.06295
Autor:
Kaladzhyan, Vardan, Pinon, Sarah, Joucken, Frédéric, Ge, Zhehao, Quezada-Lopez, Eberth A., Taniguchi, T., Watanabe, K., Velasco Jr, Jairo, Bena, Cristina
Publikováno v:
Phys. Rev. B 104, 155418 (2021)
We use an exact analytical technique [Phys. Rev. B \textbf{101}, 115405 (2020), Phys. Rev. B \textbf{102}, 165117 (2020)] to recover the surface Green's functions for Bernal (ABA) and rhombohedral (ABC) graphite. For rhombohedral graphite we recover
Externí odkaz:
http://arxiv.org/abs/2105.08723
Autor:
Kaladzhyan, Vardan, Joucken, Frédéric, Ge, Zhehao, Quezada-Lopez, Eberth A., Taniguchi, Takashi, Watanabe, Kenji, Velasco Jr, Jairo, Bena, Cristina
We calculate the form of quasiparticle interference patterns in bilayer graphene within a low-energy description, taking into account perturbatively the trigonal warping terms. We introduce four different types of impurities localized on the A and B
Externí odkaz:
http://arxiv.org/abs/2105.01068
Autor:
Joucken, Frédéric, Bena, Cristina, Ge, Zhehao, Quezada-Lopez, Eberth A., Ducastelle, François, Tanagushi, Takashi, Watanabe, Kenji, Velasco Jr, Jairo
Publikováno v:
Phys. Rev. Lett. 127, 106401 (2021)
The properties of semiconductors can be crucially impacted by midgap states induced by dopants, which can be native or intentionally incorporated in the crystal lattice. For Bernal-stacked bilayer graphene (BLG), which has a tunable bandgap, the exis
Externí odkaz:
http://arxiv.org/abs/2104.15105