Zobrazeno 1 - 10
of 258
pro vyhledávání: '"Nechaev, I."'
Autor:
Nechaev, I. A., Krasovskii, E. E.
Publikováno v:
New Journal of Physics, 24, 013021 (2022)
A theoretical study is presented of the effect of an in-plane magnetic exchange field on the band structure of centrosymmetric films of noble metals and topological insulators. Based on an ab initio relativistic $\mathbf{k}\cdot\mathbf{p}$ theory, a
Externí odkaz:
http://arxiv.org/abs/2110.03583
Autor:
Nechaev, I. A., Krasovskii, E. E.
Publikováno v:
Phys. Rev. B 103, 155114 (2021)
We present an ab initio relativistic k.p theory of the effect of magnetic exchange field on the band structure in the gap region of bulk crystals and thin films of three-dimensional layered topological insulators. For the field perpendicular to the l
Externí odkaz:
http://arxiv.org/abs/2012.11363
Autor:
Nechaev, I. A., Krasovskii, E. E.
Publikováno v:
Phys. Rev. B 102, 115437 (2020)
Based on ab initio relativistic ${\mathbf k}\cdot{\mathbf p}$ theory, we derive an effective two-band model for surface states of three-dimensional topological insulators up to seventh order in $\mathbf{k}$. It provides a comprehensive description of
Externí odkaz:
http://arxiv.org/abs/2005.14557
Autor:
Usachov, D. Yu., Nechaev, I. A., Poelchen, G., Güttler, M., Krasovskii, E. E., Schulz, S., Generalov, A., Kliemt, K., Kraiker, A., Krellner, C., Kummer, K., Danzenbächer, S., Laubschat, C., Weber, A. P., Chulkov, E. V., Santander-Syro, A. F., Imai, T., Miyamoto, K., Okuda, T., Vyalikh, D. V.
Publikováno v:
Phys. Rev. Lett. 124, 237202 (2020)
Spin-orbit interaction and structure inversion asymmetry in combination with magnetic ordering is a promising route to novel materials with highly mobile spin-polarized carriers at the surface. Spin-resolved measurements of the photoemission current
Externí odkaz:
http://arxiv.org/abs/2002.01701
Autor:
Nechaev, I. A., Krasovskii, E. E.
Publikováno v:
Phys. Rev. B 97, 041407 (2018)
A microscopic approach is developed to scattering of surface states from a non-magnetic linear defect at a surface with strong spin-orbit interaction. Spin-selective reflection resonances in scattering of Rashba-split surface states by an atomic stri
Externí odkaz:
http://arxiv.org/abs/1712.09593
Autor:
Poyli, M. Ameen, Hrtoň, M., Nechaev, I. A., Nikitin, A., Echenique, P. M., Silkin, V. M., Aizpurua, J., Esteban, R.
Publikováno v:
Phys. Rev. B 97, 115420 (2018)
We study the selective excitation at infrared and THz frequencies of optical and acoustic plasmonic modes supported by thin topological insulators. These modes are characterized by effective net charge or net spin density, respectively, and we study
Externí odkaz:
http://arxiv.org/abs/1707.03050
Publikováno v:
Phys. Rev. B 96, 155309 (2017)
Recently, it was shown that quantum spin Hall insulator (QSHI) phase with a gap wide enough for practical applications can be realized in the ultra thin films constructed from two inversely stacked structural elements of trivial band insulator BiTeI.
Externí odkaz:
http://arxiv.org/abs/1706.08127
Autor:
Jakob, P., Zaitsev, N. L., Namgalies, A., Tonner, R., Nechaev, I. A., Tautz, F. S., Höfer, U., Sanchez-Portal, D.
Publikováno v:
Phys. Rev. B 94, 125436 (2016)
The theoretical modelling of metal-organic interfaces represents a formidable challenge, especially in consideration of the delicate balance of various interaction mechanisms and the large size of involved molecular species. In the present study, the
Externí odkaz:
http://arxiv.org/abs/1608.01184
Publikováno v:
Scientific Reports 7, 43666 (2017)
The quantum spin Hall insulators predicted ten years ago and now experimentally observed are instrumental for a breakthrough in nanoelectronics due to non-dissipative spin-polarized electron transport through their edges. For this transport to persis
Externí odkaz:
http://arxiv.org/abs/1607.06612
Autor:
Nechaev, I. A., Krasovskii, E. E.
Publikováno v:
Phys. Rev. B 94, 201410 (2016)
We present a method to microscopically derive a small-size k$\cdot$p Hamiltonian in a Hilbert space spanned by physically chosen ab initio spinor wave functions. Without imposing any complementary symmetry constraints, our formalism equally treats th
Externí odkaz:
http://arxiv.org/abs/1607.06346