Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Vardan Kaladzhyan"'
Publikováno v:
New Journal of Physics, Vol 22, Iss 10, p 103042 (2020)
We provide an exact analytical technique to obtain within a lattice model the wave functions of the edge states in zigzag- and bearded-edge graphene, as well as of the Fermi-arc surface states in Weyl semimetals described by a minimal bulk model. We
Externí odkaz:
https://doaj.org/article/836b689cf19348e2b04977a1977baf05
We study spin configurations of classical magnetic impurities placed close to the edge of a two-dimensional topological superconductor both analytically and numerically. First, we demonstrate that the spin of a single magnetic impurity close to the e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::086366a84938c4e8a583115efc0d9acd
Publikováno v:
Physical Review B. 104
We introduce three new analytical and semi-analytical tools that allow one to determine the topological character of impurity Shiba chains. The analytical methods are based on calculating the effective Green's function of an infinite embedded chain u
Autor:
Vardan Kaladzhyan, Frédéric Joucken, Zhehao Ge, Eberth A. Quezada-Lopez, Takashi Taniguchi, Kenji Watanabe, Jairo Velasco, Cristina Bena
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::081bdb1b03b8aab4d8357170ee3ecd8b
http://arxiv.org/abs/2105.01068
http://arxiv.org/abs/2105.01068
Publikováno v:
Physical Review B
We study the RKKY interaction between two magnetic impurities located on the surface of a three-dimensional Dirac semimetal with two Dirac nodes in the band structure. By taking into account both bulk and surface contributions to the exchange interac
Autor:
C. Bena, Sarah Pinon, Frédéric Joucken, Zhehao Ge, Takashi Taniguchi, Vardan Kaladzhyan, Jairo Velasco, Eberth A. Quezada-Lopez, Kenji Watanabe, Aires Ferreira
Graphite crystals used to prepare graphene-based heterostructures are generally assumed to be defect free. We report here scanning tunneling microscopy results that show graphite commonly used to prepare graphene devices can contain a significant amo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31a115af6febd235f0ae8bd52ac21300
Autor:
Vardan Kaladzhyan, Sarah Pinon, Zhehao Ge, Frédéric Joucken, Eberth A. Quezada-Lopez, Cristina Bena, Takashi Taniguchi, Jairo Velasco, Kenji Watanabe
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52c4946058bfa8d1ef5deb7d81dc0143
Publikováno v:
Physical Review B
Physical Review B, American Physical Society, 2020, 102, pp.165117. ⟨10.1103/PhysRevB.102.165117⟩
Physical Review B, 2020, 102, pp.165117. ⟨10.1103/PhysRevB.102.165117⟩
Physical Review B, American Physical Society, 2020, 102, pp.165117. ⟨10.1103/PhysRevB.102.165117⟩
Physical Review B, 2020, 102, pp.165117. ⟨10.1103/PhysRevB.102.165117⟩
We use the exact analytical technique introduced by us [Phys. Rev. B 101, 115405 (2020)] to recover the surface Green's functions and the corresponding Fermi-arc surface states for various lattice models of Weyl semimetals. For these models we use th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c75759689c16df35d28ad51c824a248
https://hal-cea.archives-ouvertes.fr/cea-03196103/document
https://hal-cea.archives-ouvertes.fr/cea-03196103/document
Autor:
C. Bena, Vardan Kaladzhyan
Publikováno v:
Physical Review B
Physical Review B, 2019, 100 (8), pp.081106(R). ⟨10.1103/PhysRevB.100.081106⟩
Physical Review B, American Physical Society, 2019, 100 (8), pp.081106(R). ⟨10.1103/PhysRevB.100.081106⟩
Physical Review B, 2019, 100 (8), pp.081106(R). ⟨10.1103/PhysRevB.100.081106⟩
Physical Review B, American Physical Society, 2019, 100 (8), pp.081106(R). ⟨10.1103/PhysRevB.100.081106⟩
We provide here a new and exact formalism to describe the formation of end, edge or surface states through the evolution of impurity-induced states. We propose a general algorithm that consists of finding the impurity states via the T-matrix formalis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bf175352924cba72998647114362e24
https://cea.hal.science/cea-03196153/document
https://cea.hal.science/cea-03196153/document
Publikováno v:
Physical Review B
Physical Review B, American Physical Society, 2020, 101 (20), pp.205136. ⟨10.1103/PhysRevB.101.205136⟩
Physical Review B, 2020, 101 (20), pp.205136. ⟨10.1103/PhysRevB.101.205136⟩
Physical Review B, American Physical Society, 2020, 101 (20), pp.205136. ⟨10.1103/PhysRevB.101.205136⟩
Physical Review B, 2020, 101 (20), pp.205136. ⟨10.1103/PhysRevB.101.205136⟩
International audience; We provide a new analytical tool to calculate the energies of Andreev bound states (ABS) in long imperfect SNS junctions, at present these can only be described by numerical tools. We model an NS junction as a delta-function "
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a590ce566053bfdd61fa7248061e7bf
http://arxiv.org/abs/1906.10139
http://arxiv.org/abs/1906.10139