Výsledky vyhledávání - "Pournaghavi, Nezhat"

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Chiral edge transport along domain walls in magnetic topological insulator nanoribbons

Autor: Pournaghavi, Nezhat, Canali, Carlo M.

Publikováno v: J. Phys.: Condens. Matter 36 405803 (2024)

Quantum anomalous Hall insulators are topologically characterized by non-zero integer Chern numbers, the sign of which depends on the direction of the exchange field that breaks time-reversal symmetry. This feature allows the manipulation of the cond

Externí odkaz: http://arxiv.org/abs/2406.08258

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Spin transport properties in a topological insulator sandwiched between two-dimensional magnetic layers

Autor: Pournaghavi, Nezhat, Sadhukhan, Banasree, Delin, Anna

Nontrivial band topology along with magnetism leads to different novel quantum phases. When time-reversal-symmetry is broken in three-dimensional topological insulators (TIs) by applying high enough magnetic field or proximity effect, different phase

Externí odkaz: http://arxiv.org/abs/2309.04301

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Carbosilicene and germasilicene: Two 2D materials with excellent structural, electronic and optical properties

Autor: Amjadian, Saeid, Esmaeilzadeh, Mahdi, Pournaghavi, Nezhat

Using first principle calculations, we study the structural, optical and electronic properties of two-dimensional silicene-like structures of CSi7 (carbosilicene) and GeSi7 (germasilicene) monolayers. We show that both CSi7 and GeSi7 monolayers have

Externí odkaz: http://arxiv.org/abs/2201.08590

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Non-local sidewall response and deviation from exact quantization of the topological magnetoelectric effect in axion-insulator thin films

Autor: Pournaghavi, Nezhat, Pertsova, Anna, MacDonald, Allan H., Canali, Carlo

Publikováno v: Phys. Rev. B 104, L201102 (2021)

Topological insulator (TI) thin films with surface magnetism are expected to exhibit a quantized anomalous Hall effect (QAHE) when the magnetizations on the top and bottom surfaces are parallel, and a quantized topological magnetoelectric (QTME) resp

Externí odkaz: http://arxiv.org/abs/2107.02410

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Quantum transport by spin-polarized edge states in graphene nanoribbons in the quantum spin Hall and quantum anomalous Hall regimes

Autor: Pournaghavi, Nezhat, Holmqvist, Cecilia, Pertsova, Anna, Canali, Carlo

Publikováno v: Phys. Status Solidi RRL. 2018 doi:10.1002/pssr.201800210

Using the non-equilibrium Green\noindent 's function method and the Keldysh formalism, we study the effects of spin-orbit interactions and time-reversal symmetry breaking exchange fields on non-equilibrium quantum transport in graphene armchair nanor

Externí odkaz: http://arxiv.org/abs/1805.02418

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