Zobrazeno 1 - 10
of 190
pro vyhledávání: '"Eckern, Ulrich"'
The transmission through a magnetic layer of correlated electrons sandwiched between non-interacting normal-metal leads is studied within model calculations. We consider the linear regime in the framework of the Meir-Wingreen formalism, according to
Externí odkaz:
http://arxiv.org/abs/2104.09507
Autor:
Eckern, Ulrich, Wysokiński, Karol I.
Publikováno v:
Phys. Rev. Research 3, 043003 (2021)
The transport properties of junctions composed of a central region tunnel-coupled to external electrodes are frequently studied within the single-impurity Anderson model with Hubbard on-site interaction. In the present work, we supplement the model w
Externí odkaz:
http://arxiv.org/abs/2103.08985
Autor:
Fadlallah, Mohamed M., Eckern, Ulrich
Publikováno v:
New J. Phys. 22, 093028 (2020)
Due to their characteristic geometry, TiO$_2$ nanotubes (TNTs), suitably doped by metal-substitution to enhance their photocatalytic properties, have a high potential for applications such as clean fuel production. In this context, we present a detai
Externí odkaz:
http://arxiv.org/abs/2008.05350
Autor:
Eckern, Ulrich, Wysokiński, Karol I.
Publikováno v:
New J. Phys. 22, 013045 (2020)
The quest for good thermoelectric materials and/or high-efficiency thermoelectric devices is of primary importance from theoretical and practical points of view. Low-dimensional structures with quantum dots or molecules are promising candidates to ac
Externí odkaz:
http://arxiv.org/abs/1904.05064
Autor:
Wen, Zhenchao, Qiu, Zhiyong, Tolle, Sebastian, Gorini, Cosimo, Seki, Takeshi, Hou, Dazhi, Kubota, Takahide, Eckern, Ulrich, Saitoh, Eiji, Takanashi, Koki
Publikováno v:
Sci. Adv. 5, eaaw9337 (2019)
Half-metallic Heusler alloys are attracting considerable attention because of their unique half-metallic band structures which exhibit high spin polarization and yield huge magnetoresistance ratios. Besides serving as ferromagnetic electrodes, Heusle
Externí odkaz:
http://arxiv.org/abs/1902.07406
Publikováno v:
New J. Phys. 20, 103024 (2018)
The magnetoresistance of a three-dimensional Rashba material placed on top of a ferromagnetic insulator is theoretically investigated. In addition to the intrinsic Rashba spin-orbit interaction, we also consider extrinsic spin-orbit coupling via side
Externí odkaz:
http://arxiv.org/abs/1805.10245
Publikováno v:
Ann. Phys. (Berlin) 530, 1700303 (2018)
In ferromagnet/normal-metal bilayers, the sensitivity of the spin Hall magnetoresistance and the spin Nernst magnetothermopower to the boundary conditions at the interface is of central importance. In general, such boundary conditions can be substant
Externí odkaz:
http://arxiv.org/abs/1708.03165
Publikováno v:
Appl. Phys. Lett. 110, 233505 (2017)
The layered misfit cobaltate Ca$_3$Co$_4$O$_9$, also known as Ca$_2$CoO$_3$[CoO$_2$]$_{1.62}$, is a promising p-type thermoelectric oxide. Employing density functional theory, we study its electronic structure and determine, on the basis of Boltzmann
Externí odkaz:
http://arxiv.org/abs/1703.10486
Autor:
Fadlallah, Mohamed M., Eckern, Ulrich
Publikováno v:
Phys. Status Solidi B 257, 1900217 (2020)
The structural, electronic, and optical properties of metal (Si, Ge, Sn, and Pb) mono- and co-doped anatase TiO$_{2}$ nanotubes are investigated, in order to elucidate their potential for photocatalytic applications. It is found that Si doped TiO$_{2
Externí odkaz:
http://arxiv.org/abs/1702.07919
Publikováno v:
Phys. Rev. B 95, 115404 (2017)
The spin-charge coupled dynamics in a thin, magnetized metallic system are investigated. The effective driving force acting on the charge carriers is generated by a dynamical magnetic texture, which can be induced, e.g., by a magnetic material in con
Externí odkaz:
http://arxiv.org/abs/1611.03378