Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Ion Cosma Fulga"'
Publikováno v:
Physical Review Research, Vol 6, Iss 4, p 043167 (2024)
We propose a network-model realization of magnetic higher-order topological phases (HOTPs) in the presence of the combined space-time symmetry C_{4}T—the product of a fourfold rotation and time-reversal symmetry. We show that the system possesses t
Externí odkaz:
https://doaj.org/article/050478b7a098457a939204390feeedab
Symmetry‐Induced Selective Excitation of Topological States in Su–Schrieffer–Heeger Waveguide Arrays
Autor:
Min Tang, Jiawei Wang, Sreeramulu Valligatla, Christian N. Saggau, Haiyun Dong, Ehsan Saei Ghareh Naz, Sebastian Klembt, Ching Hua Lee, Ronny Thomale, Jeroen van den Brink, Ion Cosma Fulga, Oliver G. Schmidt, Libo Ma
Publikováno v:
Advanced Photonics Research, Vol 4, Iss 11, Pp n/a-n/a (2023)
The investigation of topological state transition in carefully designed photonic lattices is of high interest for fundamental research, as well as for applied studies such as manipulating light flow in on‐chip photonic systems. Herein, the topologi
Externí odkaz:
https://doaj.org/article/7fe35d816dc443adb473d219fac4ba29
Autor:
Viktor Könye, Adrien Bouhon, Ion Cosma Fulga, Robert-Jan Slager, Jeroen van den Brink, Jorge I. Facio
Publikováno v:
Physical Review Research, Vol 3, Iss 4, p L042017 (2021)
Due to their topological charge, or chirality, the Weyl cones present in topological semimetals are considered robust against arbitrary perturbations. One well-understood exception to this robustness is the pairwise creation or annihilation of Weyl c
Externí odkaz:
https://doaj.org/article/cfbaa9d70d2749019f7efce1748c03c8
Autor:
Gabriele Naselli, Ali G. Moghaddam, Solange Di Napoli, Verónica Vildosola, Ion Cosma Fulga, Jeroen van den Brink, Jorge I. Facio
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p 033198 (2022)
We analyze the electronic structure of topological surface states in the family of magnetic topological insulators MnBi_{2n}Te_{3n+1}. We show that, at natural-cleavage surfaces, the Dirac cone warping changes its symmetry from hexagonal to trigonal
Externí odkaz:
https://doaj.org/article/271df8f38c324dc59d2e2bc4a4e3b128
Publikováno v:
Physical Review Research, Vol 2, Iss 2, p 022048 (2020)
Anderson localization in two-dimensional topological insulators takes place via the so-called levitation and pair annihilation process. As disorder is increased, extended bulk states carrying opposite topological invariants move towards each other in
Externí odkaz:
https://doaj.org/article/54e23bdb9d1e4bb299a064afa7a09a6b
Autor:
Jonathan Reiner, Abhay Kumar Nayak, Nurit Avraham, Andrew Norris, Binghai Yan, Ion Cosma Fulga, Jung-Hyun Kang, Torsten Karzig, Hadas Shtrikman, Haim Beidenkopf
Publikováno v:
Physical Review X, Vol 7, Iss 2, p 029902 (2017)
Externí odkaz:
https://doaj.org/article/dc34ae4b8ccd4463a957c375d4b90bce
Autor:
Jonathan Reiner, Abhay Kumar Nayak, Nurit Avraham, Andrew Norris, Binghai Yan, Ion Cosma Fulga, Jung-Hyun Kang, Torsten Karzig, Hadas Shtrikman, Haim Beidenkopf
Publikováno v:
Physical Review X, Vol 7, Iss 2, p 021016 (2017)
The higher the energy of a particle is above equilibrium, the faster it relaxes because of the growing phase space of available electronic states it can interact with. In the relaxation process, phase coherence is lost, thus limiting high-energy quan
Externí odkaz:
https://doaj.org/article/94d49e95df44401e9ad69e21627c06f3
Publikováno v:
Physical Review B. 107
The Nielsen-Ninomiya theorem, dubbed `fermion-doubling', poses a problem for the naive discretization of a single (massless) Dirac cone on a two-dimensional surface. The inevitable appearance of an additional, unphysical fermionic mode can, for examp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::364344964795ec720c712d3c278eb158
https://doi.org/10.1103/physrevb.107.195409
https://doi.org/10.1103/physrevb.107.195409
Autor:
Ali Ghorbanzadeh Moghaddam, Ion Cosma Fulga, Verónica Vildosola, Jorge Facio, Gabriele Naselli, Solange Di Napoli, Jeroen Van den Brink
We analyze the electronic structure of topological surface states in the family of magnetic topological insulators MnBi$_{2n}$Te$_{3n+1}$. We show that, at natural-cleavage surfaces, the Dirac cone warping changes its symmetry from hexagonal to trigo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b1b463009aadbdb408570cba51bf3ec
We demonstrate that dislocations in two-dimensional non-Hermitian systems can give rise to density accumulation or depletion through the localization of an extensive number of states. These effects are shown by numerical simulations in a prototype la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8724835a9760d2222a8059834ef1e49
https://trepo.tuni.fi/handle/10024/136999
https://trepo.tuni.fi/handle/10024/136999