scholarly journals Electron-electron interactions, topological phase, and optical properties of a charged artificial benzene ring

2015 ◽  
Vol 92 (24) ◽  
Author(s):  
Isil Ozfidan ◽  
Milos Vladisavljevic ◽  
Marek Korkusinski ◽  
Pawel Hawrylak
Keyword(s):  
Optical Properties ◽  
Benzene Ring ◽  
Topological Phase ◽  
Electron Interactions

scholarly journals External tuning of topological phase transitions induced by interaction driven mass renormalization

2021 ◽  
Author(s):  
Thies Jansen ◽  
Alexander Brinkman
Keyword(s):  
Phase Transition ◽  
Mean Field Theory ◽  
Tight Binding ◽  
Mean Field ◽  
Topological Phase ◽  
Binding Model ◽  
System A ◽  
Topological Phase Transition ◽  
Topological Phases Of Matter ◽  
Electron Interactions

Abstract Electron-electron interactions can be useful for realizing new nontrivial topological phases of matter. Here, we show by means of a tight-binding model and mean field theory how electron-electron interactions can lead to a topological phase transition. By externally adding or removing electrons from the system a band inversion between two bands with dierent parity is induced. This leads to a topological nontrivial phase if spin-orbit coupling is present. Besides the toy-model illustrating this mechanism, we also propose SmB6 as a possible playground for experimentally realizing a topological phase transition by external tuning.

2-[(E)-2-(3-Hydroxy-4-methoxyphenyl)ethenyl]-1-methylquinolinium 4-chlorobenzenesulfonate

2006 ◽  
Vol 62 (5) ◽  
pp. o1802-o1804 ◽  
Author(s):  
Suchada Chantrapromma ◽  
Boonwasana Jindawong ◽  
Hoong-Kun Fun ◽  
P. S. Patil ◽  
Chatchanok Karalai
Keyword(s):  
Optical Properties ◽  
Benzene Ring ◽  
Title Compound ◽  
Dihedral Angles ◽  
Compound C ◽  
Non Linear ◽  
Linear Optical Properties ◽  
The Mean ◽  
Linear Optical ◽  
A Chain

The title compound, C19H18NO2 +·C6H4ClO3S−, exhibits non-linear optical properties. The cation is almost planar and the benzene ring of the anion makes dihedral angles of 48.97 (6) and 51.63 (7)° with the mean planes through the quinolinium system and the benzene ring of the cation, respectively. The anions are linked by C—H...O interactions, forming a chain along the a axis, while the cations are stacked along the a axis. The anionic chains and the cationic stacks are alternately arranged.

Topological phase and optical properties of LuNiBi bulk and nano-layer

2017 ◽  
Vol 634 ◽  
pp. 112-120 ◽  
Author(s):  
Mitra Narimani ◽  
Zahra Nourbakhsh
Keyword(s):  
Optical Properties ◽  
Topological Phase

Optical characteristics of injection-molded fluorene polymers

2013 ◽  
Vol 33 (6) ◽  
pp. 557-563 ◽  
Author(s):  
Mariko Kato ◽  
Hiroshi Ito
Keyword(s):  
Optical Properties ◽  
Temperature Dependence ◽  
Benzene Ring ◽  
Flow Characteristics ◽  
High Refractive Index ◽  
Digital Cameras ◽  
Optical Retardation ◽  
Injection Molded ◽  
The Difference ◽  
Aspheric Lenses

Abstract Digital cameras are small, but they must be able to take images with numerous pixels. To use few lenses in devices, aspheric lenses have been used. Fluorene-based polymers (FBPs) have a high refractive index and low birefringence. Because optical lenses must be manufactured as designed with low optical retardation, FBP optical lenses are widely used. This study assessed optical and flow characteristics of polycarbonate (PC) and two kinds of FBP. Molded specimen characteristics of PC and two FBPs revealed these properties of the FBPs. The results show that the unique structure of FBPs eliminated birefringence, because of the cardo structure part, including the fluorene ring. Differences in optical properties are attributable to structural differences of the part which is polymerized with the fluorene structure (the X part). The temperature dependence of FBPs in the flow characteristics and optical properties was smaller than that of PC; the slight temperature dependence is particularly obvious above the glass transition temperature (Tg). The benzene ring content of FBP affects the resin optical and physical properties. The influence of the difference between the fluorene polyester structure and the PC structure was greater than that of the benzene ring content in the X part, in the molecular structure of FBP.

scholarly journals Synthesis and optical properties of poly(N-octyl-m-benzamide)s bearing an oligothiophene chromophore on the benzene ring

2016 ◽  
Vol 48 (5) ◽  
pp. 605-610 ◽  
Author(s):  
Koji Takagi ◽  
Yuma Nishikawa ◽  
Kana Shimizu ◽  
Ryohei Yamakado ◽  
Shinri Sugimoto ◽  
...  
Keyword(s):  
Optical Properties ◽  
Benzene Ring

Conjugated push-pull salts derived from linear benzobisthiazole: preparation and optical properties

2013 ◽  
Vol 67 (1) ◽  
Author(s):  
Alexandra Čibová ◽  
Peter Magdolen ◽  
Andrea Fülöpová ◽  
Pavol Zahradník
Keyword(s):  
Optical Properties ◽  
Benzene Ring ◽  
Quantum Chemical ◽  
Optical Materials ◽  
Chemical Structure ◽  
Non Linear ◽  
Linear Optical Properties ◽  
Linear Optical ◽  
New Compounds ◽  
Semi Empirical

AbstractA series of novel monomethylated salts derived from linear benzobisthiazole was prepared. The push-pull attributes of these new compounds are represented by a quaternised azolium cycle as the acceptor part at one end of the structure and the dialkylamino- or diarylamino-substituted benzene ring as the donor part at the opposite end. Both moieties are connected by a conjugated linker consisting of one or two double bonds. Such dipolar structures are promising candidates for non-linear optical materials. The quantum-chemical indices describing linear and non-linear optical properties were obtained from semi-empirical calculations. The relationships between the chemical structure and non-linear optical properties of the cations studied were obtained. Effective conjugation was confirmed by measuring the optical properties in the UV-VIS region.

Sign in / Sign up

Export Citation Format

Share Document