Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Lofwander, Tomas"'
Autor:
Seja, Kevin Marc, Lofwander, Tomas
Publikováno v:
Phys. Rev. B 106, 144511 (2022)
The Eilenberger-Larkin-Ovchinnikov-Eliashberg quasiclassical theory of superconductivity is a powerful method enabling studies of a wide range of equilibrium and non-equilibrium phenomena in conventional and unconventional superconductors. We introdu
Externí odkaz:
http://arxiv.org/abs/2205.09001
Akademický článek
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Publikováno v:
Phys. Rev. B 95, 165420 (2017)
We study time-dependent electron transport and quantum noise in a ballistic graphene field effect transistor driven by an ac gate potential. The non-linear response to the ac signal is computed through Floquet theory for scattering states and Landaue
Externí odkaz:
http://arxiv.org/abs/1612.08909
Publikováno v:
Phys. Rev. B 94, 125445 (2016)
We present results for time-dependent electron transport in a ballistic graphene field-effect transistor with an ac-driven gate. Nonlinear response to the ac drive is derived utilizing Floquet theory for scattering states in combination with Landauer
Externí odkaz:
http://arxiv.org/abs/1606.09036
Autor:
Bergvall, Anders, Lofwander, Tomas
We report a detailed analytic investigation of the interplay between size quantization and local scattering centers in armchair graphene nanoribbons, as seen in the conductance. The scattering property of a local scattering center is dependent on if
Externí odkaz:
http://arxiv.org/abs/1408.0962
Publikováno v:
Phys. Rev. B 91, 245425 (2015)
The reason why the half-integer quantum Hall effect (QHE) is suppressed in graphene grown by chemical vapor deposition (CVD) is unclear. We propose that it might be connected to extended defects in the material and present results for the quantum Hal
Externí odkaz:
http://arxiv.org/abs/1408.0394
Publikováno v:
Phys. Rev. B 88, 054502 (2013)
We discuss the Josephson effect in strongly spin-polarized ferromagnets where triplet correlations are induced by means of spin-active interface scattering, extending our earlier work [Phys. Rev. Lett. 102, 227005 (2009)] by including impurity scatte
Externí odkaz:
http://arxiv.org/abs/1306.0141
Autor:
Bergvall, Anders, Lofwander, Tomas
Publikováno v:
Phys. Rev. B 87, 205431 (2013)
We report a detailed investigation of the interplay between size quantization and local scattering centers in graphene nanoribbons, as seen in the local density of states. The spectral signatures, obtained after Fourier transformation of the local de
Externí odkaz:
http://arxiv.org/abs/1212.5730
Publikováno v:
Phys. Rev. B 87, 205429 (2013)
We analyze the quantum Hall effect in single layer graphene with bilayer stripe defects. Such defects are often encountered at steps in the substrate of graphene grown on silicon carbide. We show that AB or AA stacked bilayer stripes result in large
Externí odkaz:
http://arxiv.org/abs/1211.5351
Publikováno v:
Phys. Rev. Lett. 105, 207001 (2010)
We report an extensive theoretical analysis of point-contact Andreev reflection data available in literature on ferromagnetic CrO$_2$. We find that the spectra can be well understood within a model of fully spin-polarized bands in CrO$_2$ together wi
Externí odkaz:
http://arxiv.org/abs/1007.3147