Search Results - "Fulga, Ion Cosma"

Bulk-boundary-defect correspondence at disclinations in rotation-symmetric topological insulators and superconductors by Geier, Max, Fulga, Ion Cosma, Lau, Alexander

“…We study a link between the ground-state topology and the topology of the lattice via the presence of anomalous states at disclinations -- topological lattice…”
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Partial Lattice Defects in Higher-Order Topological Insulators by Queiroz, Raquel, Fulga, Ion Cosma, Avraham, Nurit, Beidenkopf, Haim, Cano, Jennifer

“…Nonzero weak topological indices are thought to be a necessary condition to bind a single helical mode to lattice dislocations. In this work we show that…”
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Visualization of an axion insulating state at the transition between 2 chiral quantum anomalous Hall states by Allen, Monica, Cui, Yongtao, Ma, Eric Yue, Mogi, Masataka, Kawamura, Minoru, Fulga, Ion Cosma, Goldhaber-Gordon, David, Tokura, Yoshinori, Shen, Zhi-Xun

“…Quantum-relativistic materials often host electronic phenomena with exotic spatial distributions. In particular, quantum anomalous Hall (QAH) insulators…”
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Coexisting edge states and gapless bulk in topological states of matter by Baum, Yuval, Posske, Thore, Fulga, Ion Cosma, Trauzettel, Björn, Stern, Ady

“…We consider two-dimensional systems in which edge states coexist with a gapless bulk. Such systems may be constructed, for example, by coupling a gapped…”
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Simulating Floquet topological phases in static systems by Franca, Selma, Hassler, Fabian, Fulga, Ion Cosma

“…We show that scattering from the boundary of static, higher-order topological insulators (HOTIs) can be used to simulate the behavior of (time-periodic)…”
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Phase transitions of wave packet dynamics in disordered non-Hermitian systems by Spring, Helene, Könye, Viktor, Gerritsma, Fabian A., Fulga, Ion Cosma, Akhmerov, Anton R.

“…Disorder can localize the eigenstates of one-dimensional non-Hermitian systems, leading to an Anderson transition with a critical exponent of 1. We show that,…”
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Anomalous levitation and annihilation in Floquet topological insulators by Liu, Hui, Fulga, Ion Cosma, Asbóth, János K.

“…Anderson localization in two-dimensional topological insulators takes place via the so-called levitation and pair annihilation process. As disorder is…”
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Magnetic warping in topological insulators by Naselli, Gabriele, Moghaddam, Ali G., Di Napoli, Solange, Vildosola, Verónica, Fulga, Ion Cosma, van den Brink, Jeroen, Facio, Jorge I.

“…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…”
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Hot Electrons Regain Coherence in Semiconducting Nanowires by Reiner, Jonathan, Nayak, Abhay Kumar, Avraham, Nurit, Norris, Andrew, Yan, Binghai, Fulga, Ion Cosma, Kang, Jung-Hyun, Karzig, Toesten, Shtrikman, Hadas, Beidenkopf, Haim

“…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…”
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Symmetry‐Induced Selective Excitation of Topological States in Su–Schrieffer–Heeger Waveguide Arrays by Tang, Min, Wang, Jiawei, Valligatla, Sreeramulu, Saggau, Christian N., Dong, Haiyun, Saei Ghareh Naz, Ehsan, Klembt, Sebastian, Lee, Ching Hua, Thomale, Ronny, van den Brink, Jeroen, Fulga, Ion Cosma, Schmidt, Oliver G., Ma, Libo

“…The investigation of topological state transition in carefully designed photonic lattices is of high interest for fundamental research, as well as for applied…”
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Engineering a pure Dirac regime in ZrTe$_5 by Facio, Jorge I., Nocerino, Elisabetta, Fulga, Ion Cosma, Wawrzynczak, Rafal, Brown, Joanna, Gu, Genda, Li, Qiang, Mansson, Martin, Sassa, Yasmine, Ivashko, Oleh, von Zimmermann, Martin, Mende, Felix, Gooth, Johannes, Galeski, Stanislaw, van den Brink, Jeroen, Meng, Tobias

“…Real-world topological semimetals typically exhibit Dirac and Weyl nodes that coexist with trivial Fermi pockets. This tends to mask the physics of the…”
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Publisher’s Note: Hot Electrons Regain Coherence in Semiconducting Nanowires [Phys. Rev. X 7 , 021016 (2017)] by Reiner, Jonathan, Nayak, Abhay Kumar, Avraham, Nurit, Norris, Andrew, Yan, Binghai, Fulga, Ion Cosma, Kang, Jung-Hyun, Karzig, Torsten, Shtrikman, Hadas, Beidenkopf, Haim

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Mixed higher-order topology: boundary non-Hermitian skin effect induced by a Floquet bulk by Liu, Hui, Fulga, Ion Cosma

“…Phys. Rev. B 108, 035107 (2023) We show that anomalous Floquet topological insulators generate intrinsic, non-Hermitian topology on their boundary. As a…”
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Geometry-independent tight-binding method for massless Dirac fermions in two dimensions by Ziesen, Alexander, Fulga, Ion Cosma, Hassler, Fabian

“…Phys. Rev. B 107, 195409 (2023) The Nielsen-Ninomiya theorem, dubbed `fermion-doubling', poses a problem for the naive discretization of a single (massless)…”
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Phase transitions of wave packet dynamics in disordered non-Hermitian systems by Spring, Helene, Könye, Viktor, Gerritsma, Fabian A, Fulga, Ion Cosma, Akhmerov, Anton R

“…SciPost Phys. 16, 120 (2024) Disorder can localize the eigenstates of one-dimensional non-Hermitian systems, leading to an Anderson transition with a critical…”
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Topological reflection matrix by Franca, Selma, Hassler, Fabian, Fulga, Ion Cosma

“…Phys. Rev. B 105, 155121 (2022) While periodically-driven phases offer a unique insight into non-equilibrium topology that is richer than its static…”
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Stability of Weyl node merging processes under symmetry constraints by Naselli, Gabriele, Frank, György, Varjas, Dániel, Fulga, Ion Cosma, Pintér, Gergő, Pályi, András, Könye, Viktor

“…Phys. Rev. Lett. 133, 196602 (2024) Changes in the number of Weyl nodes in Weyl semimetals occur through merging processes, usually involving a pair of…”
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Floquet-Anderson localization in the Thouless pump and how to avoid it by Grabarits, András, Takács, Attila, Fulga, Ion Cosma, Asbóth, János K

“…Phys. Rev. B 109, L180202 (2024) We investigate numerically how onsite disorder affects conduction in the periodically driven Rice-Mele model, a prototypical…”
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Disorder effects on triple-point fermions by Hsu, Hsiu-Chuan, Fulga, Ion Cosma, You, Jhih-Shih

“…Phys. Rev. B 106, 245118 (2022) The stability of three-dimensional relativistic semimetals to disorder has recently attracted great attention, but the effect…”
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Altermagnetic anomalous Hall effect emerging from electronic correlations by Sato, Toshihiro, Haddad, Sonia, Fulga, Ion Cosma, Assaad, Fakher F, Brink, Jeroen van den

“…Phys. Rev. Lett. 133, 086503 (2024) While altermagnetic materials are characterized by a vanishing net magnetic moment, their symmetry in principle allows for…”
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