Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Onipko, Alexander"'
Autor:
Onipko, Alexander, Malysheva, Lyuba
For the first time, one-particle theory of Wannier-Stark quantization for a $a(N$$-$1)-long chain affected by a homogeneous electric field $E_e$ is extended to the 2D case of $L_N$=$a(N$$-$1)-long and $L_{\cal N}$=$a$$({\cal N}$$-$1)-wide conductor,
Externí odkaz:
http://arxiv.org/abs/1707.05084
Autor:
Onipko, Alexander, Malysheva, Lyuba
We revisit the model of graphene as a $\pi$-conjugated macromolecule \cite{PRL} and show that it allows to understand the origin and describe, in many cases explicitly, the electronic structure of graphene sheets, achiral graphene ribbons and carbon
Externí odkaz:
http://arxiv.org/abs/1707.01131
Autor:
Onipko, Alexander
An exact description of $\pi$ electrons based on the tight-binding model of graphene as an alternant, plane macromolecule is presented. The model molecule can contain an arbitrary number of benzene rings and has armchair- and zigzag-shaped edges. Thi
Externí odkaz:
http://arxiv.org/abs/0808.3933
The list of textbook tunneling formulas is extended by deriving exact expressions for the transmission coefficient in graphene ribbons with armchair edges and the step-like and barrier-like profiles of site energies along the ribbon. These expression
Externí odkaz:
http://arxiv.org/abs/0805.1135
Autor:
Malysheva, Lyuba, Onipko, Alexander
Origin of the spectrum of $\pi$ electrons that results from coupling of $N$ $\cal N$-long acenes via C-C covalent bonding have been traced with the use of the Green function formalism. Exact expressions of acene and graphene Green's functions, which
Externí odkaz:
http://arxiv.org/abs/0804.4552
Autor:
Malysheva, Lyuba, Onipko, Alexander
Explicit expressions of the band spectrum near the neutrality point for armchair and zigzag graphene ribbons and carbon nanotubes were derived based on a tight-binding macromolecule model of graphene. The obtained dispersion relations are used to det
Externí odkaz:
http://arxiv.org/abs/0803.1761
Autor:
Malysheva, Lyuba, Onipko, Alexander
As a particular application of the earlier proposed model of graphene as a macromolecule, we found the exact analytical expression of dispersion relation for the band of edge states in graphene zigzag ribbons. This band is often referred to as "dispe
Externí odkaz:
http://arxiv.org/abs/0802.1385
Autor:
Malysheva, Lyuba, Onipko, Alexander
We report the exact solution of spectral problem for a graphene sheet framed by two armchair- and two zigzag-shaped boundaries. The solution is found for the $\pi$ electron Hamiltonian and gives, in particular, a closed analytic expression of edge-st
Externí odkaz:
http://arxiv.org/abs/0801.4155
Autor:
Onipko, Alexander, Malysheva, Lyuba
Predicted by Wannier in 1960 band states quantization in a constant electric field, $E_n$ = const $\pm n {\cal E}$, where $n =0$, 1, 2, ..., and ${\cal E}$ is proportional to the strength of electric field [this kind of spectrum is commonly referred
Externí odkaz:
http://arxiv.org/abs/cond-mat/0105113
Autor:
Valiokas, Ramūnas, Malysheva, Lyuba, Onipko, Alexander, Lee, Hung-Hsun, Ruželė, Živilė, Svedhem, Sofia, Svensson, Stefan C.T., Gelius, Ulrik, Liedberg, Bo
Publikováno v:
In Journal of Electron Spectroscopy and Related Phenomena 2009 172(1):9-20
