conductivity spectrum
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Author(s):  
Mari Lehti-Polojärvi ◽  
Mikko Juho Räsänen ◽  
Leena E Viiri ◽  
Hanna Vuorenpää ◽  
Susanna Miettinen ◽  
...  

2019 ◽  
Vol 122 (15) ◽  
Author(s):  
Rhys Anderson ◽  
Fudong Wang ◽  
Peihang Xu ◽  
Vijin Venu ◽  
Stefan Trotzky ◽  
...  

2018 ◽  
Vol 60 (4) ◽  
pp. 627
Author(s):  
А.В. Лукоянов ◽  
Ю.В. Князев ◽  
Ю.И. Кузьмин

AbstractThe electronic structure of GdCuGe intermetallic compound has been studied. Spin-polarized energy spectrum calculations have been performed by the band method with allowance for strong electron correlations in the 4 f -shell of gadolinium ions. Antiferromagnetic ordering of GdCuGe at low temperatures has been obtained in a theoretical calculation, with the value of the effective magnetic moment of gadolinium ions reproduced in fair agreement with experimental data. The electronic density of states has been analyzed. An optical conductivity spectrum has been calculated for GdCuGe; it reveals specific features that are analogous to the ones discovered previously in the GdCuSi compound with a similar hexagonal structure.


2017 ◽  
Vol 35 (6) ◽  
pp. 1353-1360 ◽  
Author(s):  
Rudolf A. Treumann ◽  
Wolfgang Baumjohann

Abstract. We rewrite Poynting's theorem, already used in a previous publication Treumann and Baumjohann (2017a) to derive relations between the turbulent magnetic and electric power spectral densities, to make explicit where the mechanical contributions enter. We then make explicit use of the relativistic transformation of the turbulent electric fluctuations to obtain expressions which depend only on the magnetic and velocity fluctuations. Any electric fluctuations play just an intermediate role. Equations are constructed for the turbulent conductivity spectrum in Alfvénic and non-Alfvénic turbulence in extension of the results in the above citation. An observation-based discussion of their use in application to solar wind turbulence is given. The inertial range solar wind turbulence exhibits signs of chaos and self-organization.


2016 ◽  
Vol 30 (08) ◽  
pp. 1650107
Author(s):  
Xixiao Ma ◽  
Yu Lan ◽  
Ling Qin ◽  
Shiping Feng

Within the framework of the fermion-spin theory, the charge transport in the doped Mott insulators on a honeycomb lattice is studied by taking into account the pseudogap effect. It is shown that the conductivity spectrum in the low-doped regime is separated by the pseudogap into a low-energy non-Drude peak followed by a broad mid-infrared band. However, the decrease of the pseudogap with the increase of doping leads to a shift of the position of the mid-infrared band towards the low-energy non-Drude peak, and then the low-energy Drude behavior recovers in the high-doped regime. The combined results of both the doped honeycomb-lattice and square-lattice Mott insulators indicate that the two-component conductivity induced by the pseudogap is a universal feature in the doped Mott insulators.


2015 ◽  
Vol 79 (12) ◽  
pp. 1435-1438
Author(s):  
V. G. Artemov ◽  
A. A. Volkov ◽  
N. N. Sysoev ◽  
A. A. Volkov

2015 ◽  
Vol 53 (11) ◽  
pp. 822-828 ◽  
Author(s):  
Bruno R. Matos ◽  
Elisabete I. Santiago ◽  
Jose Fernando Q. Rey ◽  
Carlos H. Scuracchio ◽  
Gerson L. Mantovani ◽  
...  

2013 ◽  
Vol 33 (5) ◽  
pp. 0526002
Author(s):  
杨翠红 Yang Cuihong ◽  
魏相飞 Wei Xiangfei ◽  
罗媛 Luo Yuan ◽  
刘立伟 Liu Liwei

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