Results 1 to 10 of about 4,914 (45)

How many surface modes does one see on the boundary of a Dirac material? [PDF]

, 2020
We present full expressions for the surface part of polarization tensor of a Dirac fermion confined in a half-space in $3+1$ dimensions. We compare this tensor to the polarization tensor of eventual surface mode (which is a $2+1$ dimensional Dirac ...
Kurkov, Maxim, Vassilevich, Dmitri
core   +3 more sources

Degeneracies and fluctuations of N\'e\`el skyrmions in confined geometries [PDF]

, 2015
The recent discovery of tunable Dzyaloshinskii-Moriya interactions in layered magnetic materials with perpendicular magnetic anisotropy makes them promising candidates for stabilization and manipulation of skyrmions at elevated temperatures.
Barkema, G. T., Buhrandt, Stefan, Duine, R. A., Fritz, Lars, Keesman, Rick, Leonov, A. O., van Dieten, P.   +6 more
core   +8 more sources

Design of acoustic metamaterials through nonlinear programming [PDF]

, 2016
The dispersive wave propagation in a periodic metamaterial with tetrachiral topology and inertial local resonators is investigated. The Floquet-Bloch spectrum of the metamaterial is compared with that of the tetrachiral beam lattice material without ...
A Bacigalupo, A Bacigalupo, A Bacigalupo, A Bacigalupo, A Bacigalupo, A Spadoni, AS Phani, D Bigoni, G Gnecco, G Gnecco, K Svanberg, K Svanberg, KT Tan, L Brillouin, XN Liu   +14 more
core   +2 more sources

Nodal-link semimetals [PDF]

, 2017
In topological semimetals, the valence band and conduction band meet at zero-dimensional nodal points or one-dimensional nodal rings, which are protected by band topology and symmetries.
Bi, Ren, Lu, Ling, Shen, Huitao, Wang, Zhong, Yan, Zhongbo, Zhang, Shou-Cheng   +5 more
core   +2 more sources

Spatial Electron-hole Separation in a One Dimensional Hybrid Organic-Inorganic Lead Iodide. [PDF]

, 2016
The increasing efficiency of the inorganic-organic hybrid halides has revolutionised photovoltaic research. Despite this rapid progress, the significant issues of poor stability and toxicity have yet to be suitably overcome.
Bronstein, H, Palgrave, RG, Savory, CN, Scanlon, DO   +3 more
core   +2 more sources

Wavevector-dependent optical properties from wavevector-independent proper conductivity tensor

, 2020
We discuss the calculation of the refractive index by means of the ab initio scalar dielectric function and point out its inherent limitations. To overcome these, we start from the recently proposed fundamental, microscopic wave equation in materials in ...
Giulio A.H. Schober, Jens Kortus, Nebahat Bulut, René Wirnata, Ronald Starke   +4 more
core   +1 more source

Access and in situ Growth of Phosphorene-Precursor Black Phosphorus

, 2014
Single crystals of orthorhombic black phosphorus can be grown by a short way transport reaction from red phosphorus and Sn/SnI4 as mineralization additive.
Eckstein, Nadine, Greiwe, Magnus, Grotz, Carolin, Hansen, Thomas, Kohlmann, Holger, Krüger, Ilona, Köpf, Marianne, Nilges, Tom, Pfister, Daniela   +8 more
core   +1 more source

Microscopic theory of refractive index applied to metamaterials: Effective current response tensor corresponding to standard relation $n^2 = \varepsilon_{\mathrm{eff}} \mu_{\mathrm{eff}}$

, 2018
In this article, we first derive the wavevector- and frequency-dependent, microscopic current response tensor which corresponds to the "macroscopic" ansatz $\vec D = \varepsilon_0 \varepsilon_{\mathrm{eff}} \vec E$ and $\vec B = \mu_0 \mu_{\mathrm{eff}} \
Schober, G. A. H., Starke, R.
core   +1 more source

Vector magnetometry using silicon vacancies in 4H-SiC at ambient conditions

, 2016
Point defects in solids promise precise measurements of various quantities. Especially magnetic field sensing using the spin of point defects has been of great interest recently.
Janzén, Erik, Kordina, Olof, Lee, Sang-Yun, Niethammer, Matthias, Ohshima, Takeshi, Son, Nguyen Tien, Stenberg, Pontus, Widmann, Matthias, Wrachtrup, Jörg   +8 more
core   +1 more source

Magnon contribution to unidirectional spin Hall magnetoresistance [PDF]

, 2019
We develop a model for the magnonic contribution to the unidirectional spin Hall magnetoresistance (USMR) of heavy metal/ferromagnetic insulator bilayer films.
Duine, R. A., Peerlings, D., Sterk, W. P.   +2 more
core   +2 more sources