Zobrazeno 1 - 10
of 227
pro vyhledávání: '"González‐Hernández, Rafael"'
This work explores the topological properties of altermagnets, a novel class of collinear magnetic materials. We employ equivariant K-theory of magnetic groups and Hamiltonian models to formulate a robust $C^z_4 \mathbb{T}$ topological invariant to c
Externí odkaz:
http://arxiv.org/abs/2412.04593
Publikováno v:
Phys. Rev. B 110, 085404, 2024
The electronic band structure of monolayer phosphorene is thoroughly studied by considering the presence of spin-orbit interaction. We employ a multiorbital Slater-Koster tight-binding approach to derive effective k.p-type Hamiltonians that describes
Externí odkaz:
http://arxiv.org/abs/2408.06252
In this work, we propose the average spin Chern number (ASCN) as an indicator of the topological significance of the spin degree of freedom within insulating materials. Whenever this number is a non-zero even integer, it distinguishes the material as
Externí odkaz:
http://arxiv.org/abs/2404.08595
Autor:
Badura, Antonin, Campos, Warlley H., Bharadwaj, Venkata K., Kounta, Ismaïla, Michez, Lisa, Petit, Matthieu, Rial, Javier, Leiviskä, Miina, Baltz, Vincent, Krizek, Filip, Kriegner, Dominik, Zemen, Jan, Telkamp, Sjoerd, Sailler, Sebastian, Lammel, Michaela, Ubiergo, Rodrigo Jaeschke, Hellenes, Anna Birk, González-Hernández, Rafael, Sinova, Jairo, Jungwirth, Tomáš, Goennenwein, Sebastian T. B., Šmejkal, Libor, Reichlova, Helena
The anomalous Nernst effect generates transverse voltage to the applied thermal gradient in magnetically ordered systems. The effect was previously considered excluded in compensated magnetic materials with collinear ordering. However, in the recentl
Externí odkaz:
http://arxiv.org/abs/2403.12929
Autor:
González-Hernández, Rafael, Ritzinger, Philipp, Výborný, Karel, Železný, Jakub, Manchon, Aurélien
The Edelstein effect is the origin of the spin-orbit torque: a current-induced torque that is used for the electrical control of ferromagnetic and antiferromagnetic materials. This effect originates from the relativistic spin-orbit coupling, which ne
Externí odkaz:
http://arxiv.org/abs/2310.06499
Publikováno v:
Phys. Rev. B 109, 045126 (2024)
The quantum nature of electron spin is crucial for establishing topological invariants in real materials. Since the spin does not in general commute with the Hamiltonian, some of the topological features of the material can be extracted from its stud
Externí odkaz:
http://arxiv.org/abs/2309.12470
Altermagnets (AM) are a recently discovered third class of collinear magnets, distinctly different from conventional ferromagnets (FM) and antiferromagnets (AF). AM have been actively researched in the last few years, but two aspects so far remain un
Externí odkaz:
http://arxiv.org/abs/2309.02355
Autor:
Kim, Seo-Jin, Zhu, Jihang, Piva, Mario M., Schmidt, Marcus, Fartab, Dorsa, Mackenzie, Andrew P., Baenitz, Michael, Nicklas, Michael, Rosner, Helge, Cook, Ashley M., González-Hernández, Rafael, Šmejkal, Libor, Zhang, Haijing
Progress in magnetoelectric materials is hindered by apparently contradictory requirements for time-reversal symmetry broken and polar ferroelectric electronic structure in common ferromagnets and antiferromagnets. Alternative routes could be provide
Externí odkaz:
http://arxiv.org/abs/2307.03541
Autor:
Šmejkal, Libor, Marmodoro, Alberto, Ahn, Kyo-Hoon, Gonzalez-Hernandez, Rafael, Turek, Ilja, Mankovsky, Sergiy, Ebert, Hubert, D'Souza, Sunil W., Šipr, Ondřej, Sinova, Jairo, Jungwirth, Tomas
Magnons in ferromagnets have one chirality, and typically are in the GHz range and have a quadratic dispersion near the zero wavevector. In contrast, magnons in antiferromagnets are commonly considered to have bands with both chiralities that are deg
Externí odkaz:
http://arxiv.org/abs/2211.13806
Axion insulators are generally understood as magnetic topological insulators whose Chern-Simons axion coupling term is quantized and equal to $\pi$. Inversion and time reversal, or the composition of either one with a rotation or a translation, are s
Externí odkaz:
http://arxiv.org/abs/2206.09815