Superconductivity in the two-dimensional nonbenzenoid biphenylene sheet with Dirac cone

During the past decade, two-dimensional materials have attracted much attention in superconductivity due to their feasible physical properties and easy chemical modifications. Herein, we use a recently literature reported novel biphenylene sheet (BP sheet) for investigating superconductivity-related physical properties. The electronic states of BP sheet that appeared near the Fermi level are composed of pz orbital of carbon due to sp2 hybridization. Also, an anisotropic Dirac cone is formed just above the Fermi level by crossing two bands comprised of different carbon atoms. One of the two bands is quasi-flat thus leading to a peak of electronic density of states above the Fermi level. In addition, the rotational-vibration phonon mode of the six-membered carbon ring is strongly coupled with electrons. The electron-phonon coupling induces the superconductivity of 6.2 K in BP sheet. Furthermore, both small uniaxial strains and electronic doping can take the Dirac cone and high electronic density of state close to the Fermi level and further raise the superconducting critical temperature to 27.4 K and 21.5 K, respectively. The obtained result suggests that BP sheet with Dirac fermions and superconductivity can be a potential material for the development of future superconducting devices.

Crime in Esports – Criminal Law Considerations

The phenomenon and development of modern digital technologies put imprint on almost all life spheres, including sports. Over the past years, there have been a rapid development of a new sport and a new direction of the sports business, i. e., esports, which, unlike traditional sports, is causally relating to information and telecommunication technologies and intellectual property. The Regulations on esports adopted in 2020 by the Ministry of Sports of the Russian Federation, expanded the concept of sport by officially recognizing esports as an independent sport. Today, esports is a fast-growing high-tech industry with an ever-growing global audience and a significant number of computer companies and stakeholders involved, which are usually in fierce competition with each other. Nevertheless, despite rapid transformation into the mainstream, this industry is faced with both traditional criminal law concerns and specific inherent to esports problems, which can hinder its potential growth. All the aforesaid suggests that the boundaries of sport are constantly expanding likewise the legal relations regulated in the digital era by criminal legislation, as well as the related law enforcement issues. At the same time, it must be acknowledged that the current legislation is imperfect, and the issues of countering illegal methods of influencing the results of computer sports competitions and electronic doping, fraud and corruption, as well as criminal protection of copyright and related rights, problems of the ratio of criminal and non-criminal in esports are understudied by experts.

Elucidating the influence of anchoring geometry on the electronic transport of carbon-atom chains

In this work, the transport properties of carbon atom chains sandwiched between Au (100) nanoelectrodes with different anchored structures have been studied using a combination of first principles and nonequilibrium Green’s function. The results show that the transport properties of the carbon chain are not only related to the chain length and the number of C atoms (odd/even), but also related to the anchoring structure of nanoelectrodes. For the same chain length and bias voltage, the current of the H–H model is about three times that of the T–T model due to more charge transfer. Meanwhile, it was also found that the C atom in contact with the electrode has a large amount of charge transfer, which provides an effective way for the electronic doping of semiconductor devices. These findings can provide theoretical support for the design of molecular devices based on the C-chain.

On the limit of proton-coupled electronic doping in a Ti(IV)-containing MOF

TiIV-containing metal-organic frameworks are known to accumulate electrons in their conduction bands, accompanied by protons, when irradiated in the presence of alcohols. The archetypal system, MIL-125, was recently shown to...

Электрофизические свойства поликристаллических пленок BiFe-=SUB=-0.95-=/SUB=-Co-=SUB=-0.05-=/SUB=-O-=SUB=-3-=/SUB=-

Semiconductor BiFe0.95Co0.05O3 thin-film compounds were obtained by a flare technique. The surface morphology of the films and the effect of electronic doping by replacing trivalent iron with cobalt ions on the structural, optical, magnetic, and kinetic properties in the temperature range 77-600 K in magnetic fields up to 12 kOe are studied. The existence of two relaxation channels in the impedance spectrum at frequencies of 0.1–1000 kHz has been established. The negative magnetoresistance in the anomalous magnetization region and the maximum magnetoimpedance in the vicinity of the surface phase transition has been found. Using the Hall effect measurements, carrier types prevailing in the magnetoresistance and magnetoimpedance effects has been found. The magnetization anomalies are explained using the model of superparamagnetic clusters and the magnetoresistance is attributed to the scattering of carriers by the spin fluctuations.