scholarly journals Anisotropic Kubo conductivity of electric field-induced monolayer β12-borophene

RSC Advances ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 648-654
Author(s):  
Mohammad Mortezaei Nobahari
Keyword(s):  
Electric Field ◽  
Optical Conductivity ◽  
Polarized Light

The optical conductivity of β12-borophene for polarized light along x direction is studied.

Ferroelastic domains and phase transitions in organic–inorganic hybrid perovskite CH3NH3PbBr3

2021 ◽  
Author(s):  
Maryam Bari ◽  
Alexei A. Bokov ◽  
Zuo-Guang Ye
Keyword(s):  
Phase Transitions ◽  
Electric Field ◽  
Light Microscopy ◽  
Domain Structure ◽  
Polarized Light ◽  
External Stress ◽  
Polarized Light Microscopy ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Ferroelastic Domains

Polarized light microscopy reveals twin domains and symmetry of the phases in CH3NH3PbBr3 crystal; domain structure remains unresponsive to electric field but changes under external stress, confirming ferroelasticity while ruling out ferroelectricity.

scholarly journals Normal electric field enhanced light-induced polarizations and magnetic detection of valley polarization in silicene

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
N. Shahabi ◽  
A. Phirouznia
Keyword(s):  
Electric Field ◽  
Light Emission ◽  
Polarized Light ◽  
Spin Current ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Normal Electric Field ◽  
Valley Polarization ◽  
Population Imbalance ◽  
Magnetic Detection

Abstract The role of staggered potential on light-induced spin and pseudo-spin polarization has been investigated in silicene. It has been shown that non-equilibrium spin and pseudo-spin polarizations are emerged in silicene sheet by applying an external perpendicular electric field in the presence of circularly polarized light emission. This electric field results in pseudo-spin resolved states very close to the Dirac points therefore could be considered as a pseudomagnetic field. It has been shown that staggered potential induced spin-valley locking and pseudo-spin resolved bands are responsible for the enhancement of the spin and pseudo-spin polarizations. Meanwhile, spin-valley locking suggests a coexistence of both spin and valley polarizations with nearly identical (or at least proportional) population imbalance at low Fermi energies which could be employed for magnetic detection of the valley polarization. It has been shown that spin-valley locking results in the protection of the spin polarizations against the relaxations in elastic scattering regime. In addition, the results indicate that the pseudo-spin current can be generated by the circularly polarized light which could be explained by asymmetric light absorption of the states in k-space.

scholarly journals Formation of amyloid-like aggregates through the attachment of protein molecules to a Congo red scaffolding framework ordered under the influence of an electric field

2010 ◽  
Vol 8 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Barbara Stopa ◽  
Barbara Piekarska ◽  
Leszek Konieczny ◽  
Marcin Król ◽  
Janina Rybarska ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Electric Field ◽  
Congo Red ◽  
Polarized Light ◽  
Sodium Dithionite ◽  
Ordered Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Protein Molecules ◽  
Ordered State

AbstractThis study describes a technique which makes it possible to introduce the amyloid-like order to protein aggregates by using the scaffolding framework built from supramolecular, fibrillar Congo red structures arranged in an electric field. The electric field was used not only to obtain a uniform orientation of the charged dye fibrils, but also to make the fibrils long, compact and rigid due to the delocalization of pi electrons, which favors ring stacking and, as a consequence, results in an increased tendency to self-assemble. The protein molecules (immunoglobulin L chain lambda, ferritin) attached to this easily adsorbing dye framework assume its ordered structure. The complex precipitating as plate-like fragments shows birefringence in polarized light. The parallel organization of fibrils can be observed with an electron microscope. The dye framework may be removed via reduction with sodium dithionite, leaving the aggregated protein molecules in the ordered state, as confirmed by X-ray diffraction studies.

Temperature and electric field induced phase transition in [110]C-oriented 0.63Pb(Mg1/3Nb2/3)O3–0.37PbTiO3 single crystals

CrystEngComm ◽  
2015 ◽  
Vol 17 (45) ◽  
pp. 8664-8670 ◽  
Author(s):  
Wenhui He ◽  
Qiang Li ◽  
Nengneng Luo ◽  
Yiling Zhang ◽  
Qingfeng Yan
Keyword(s):  
Phase Transition ◽  
Electric Field ◽  
Light Microscopy ◽  
Single Crystals ◽  
Polarized Light ◽  
Polarized Light Microscopy ◽  
Temperature Dependent ◽  
Dependent Domain

Temperature-dependent domain configurations were studied for both unpoled and poled [110]C-oriented 0.63Pb(Mg1/3Nb2/3)O3–0.37PbTiO3 (PMN–0.37PT) single crystals by polarized light microscopy (PLM).

Influence of Magnetic Field on Level of Linearly Polarized Laser Beam Passing through Faraday Crystal

2021 ◽  
Vol 408 ◽  
pp. 129-140
Author(s):  
Samer H. Zyoud ◽  
Atef Abdelkader ◽  
Ahed H. Zyoud ◽  
Araa Mebdir Holi
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Laser Beam ◽  
Active Material ◽  
Polarized Light ◽  
Linearly Polarized ◽  
Physical Effects ◽  
Pass Through ◽  
Polarization Level ◽  
Optically Active Material

Many natural materials have the ability to rotate the polarization level of linearly polarized laser beam and pass through it. This phenomenon is called optical activity. In the event that a light beam (linearly polarized) passes through an optically active material, such as a quartz crystal, and projected vertically on the optical axis, the output beam will be polarized equatorially, and the vibration level will rotate at a certain angle [1], [2], [3]. A number of crystals, liquids, solutions, and vapors rotate the electric field of linearly polarized light that passes through them [4], [5], [6], [7]. Many different physical effects are applied to optical isotropic and transparent materials that cause them to behave as optical active materials, where they are able to rotate the polarization level of the polarized light linearly and pass through it [8], [9], [10]. These effects include mechanical strength, electric field, and magnetic field. By placing one of these effects on an optically transparent medium, it changes the behavior of the light travelling through it [11].

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