Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Verma, Sonu"'
Autor:
Verma, Sonu, Park, Moon Jip
Bulk-boundary correspondence (BBC) of symmetry-protected topological (SPT) phases relates the non-trivial topological invariant of the bulk to the number of topologically protected boundary states. Recently, a finer classification of SPT phases has b
Externí odkaz:
http://arxiv.org/abs/2405.06240
Autor:
Verma, Sonu, Ghosh, Tarun Kanti
Publikováno v:
Phys. Rev. B 110, 125424 (2024)
We consider an extended trimer Su-Schrieffer-Heeger (SSH) tight-binding Hamiltonian keeping up to next-nearest-neighbor (NNN) hopping terms and on-site potential energy. The Bloch Hamiltonian can be expressed in terms of all the eight generators (i.e
Externí odkaz:
http://arxiv.org/abs/2401.11695
Hopf insulator is a representative class of three-dimensional topological insulators beyond the standard topological classification methods based on K-theory. In this letter, we discover the metallic counterpart of the Hopf insulator in the non-Hermi
Externí odkaz:
http://arxiv.org/abs/2311.02155
The $\alpha$-$T_3$ system undergoes a topological phase transition(TPT) between two distinct quantum spin-Hall phases across $\alpha=0.5$ when the spin-orbit interaction of Kane-Mele type is taken into consideration. As a hallmark of such a TPT, we f
Externí odkaz:
http://arxiv.org/abs/2309.07074
Autor:
Verma, Sonu, Park, Moon Jip
Publikováno v:
Communications Physics volume 7, Article number: 21 (2024)
It has been known that the bulk-boundary correspondence (BBC) of the non-Hermitian skin effect is characterized by the topology of the complex eigenvalue spectra, while the topology of the wave function gives rise to Hermitian BBC with conventional b
Externí odkaz:
http://arxiv.org/abs/2305.08584
Publikováno v:
Phys. Rev. B 107, 245426 (2023)
In this paper, we study the Berry curvature induced linear and nonlinear magnon transport in bilayer van der Waals antiferromagnets, where we deduce forms for the spin and energy currents within the semiclassical Boltzmann formalism under the relaxat
Externí odkaz:
http://arxiv.org/abs/2303.15426
Autor:
Juyal, Abhishek, Dwivedi, Vinod Kumar, Verma, Sonu, Nandi, Shibabrata, Agarwal, Amit, Mukhopadhyay, Soumik
Publikováno v:
Phys. Rev. B 106, 155149 (2022)
The subtle interplay of band topology and symmetry broken phase, induced by electron correlations, has immense contemporary relevance and potentially offers novel physical insights. Here, we demonstrate charge density wave (CDW) in bulk Y$_2$Ir$_2$O$
Externí odkaz:
http://arxiv.org/abs/2206.00690
Publikováno v:
Phys. Rev. B 105, 075426 (2022)
In a slab geometry with large surface-to-bulk ratio, topological surface states such as Fermi arcs for Weyl or Dirac semimetals may dominate their low-energy properties. We investigate the collective charge oscillations in such systems, finding strik
Externí odkaz:
http://arxiv.org/abs/2011.06862
Publikováno v:
Physical Review B 102, 195208 (2020)
We study the dynamical polarization function and plasmon modes for spin-orbit coupled noncentrosymmetric metals (NCMs). These systems have different Fermi surface topology for Fermi energies above and below the spin degenerate point which is also kno
Externí odkaz:
http://arxiv.org/abs/2009.13105
Publikováno v:
Phys. Rev. B 101, 085419 (2020)
We consider the effective coupling between impurity spins on surfaces of a thin-film Weyl semimetal within Ruderman-Kittel-Kasuya-Yoshida (RKKY) theory. If the spins are on the same surface, their coupling reflects the anisotropy and the spin-momentu
Externí odkaz:
http://arxiv.org/abs/1908.04554