The insulator to metal transition in LaTiO3 induced by La substitution via Sr is studied within multiband exact diagonalization dynamical mean field theory at finite temperatures. It is shown that weak hole doping triggers a large interorbital charge transfer, with simultaneous electron and hole doping of t2g subbands. The transition is first order and exhibits phase separation between insulato...

We study the dynamics of metallic vertical stripes in cuprates within the three-band Hubbard model based on a recently developed time-dependent Gutzwiller approximation. As doping increases, the optical conductivity shows transfer of spectral weight from the charge-transfer band towards (i) an incoherent band centered at 1.3 eV, (ii) a Drude peak, due mainly to motion along the stripe, and (iii...

Given the current regulatory environment surrounding doping in the world, and in view of the recurring scandals linking leading athletes in a variety of sports with doping, this paper aims to provide some thoughts on the relationship between doping and public health, taking as base reference the risks doping poses to health and considering the regulatory options that have been adopted by the in...

The electronic properties of p-doped single-walled carbon nanotube SWNT bulk samples were studied by temperature-dependent resistivity and thermopower, optical reflectivity, and Raman spectroscopy. These all give consistent results for the Fermi level downshift EF induced by doping. We find EF 0.35 eV and 0.50 eV for concentrated nitric and sulfuric acid doping respectively. With these values, ...

In this work, we study the controlled doping of thin films of substituted nickel phthalocyanine, NiPcR8, where R=-SC6H13, with anthracene and TCNQ and investigate the effects of the extent of this doping on the optical and electrical properties of NiPcR8 films. Optical constants, namely index of refraction (n) and extinction coefficient (k) have increased for both types of doping, as determined...

Nanowires are quasi-one-dimensional single crystals with lateral dimensions that can be scaled-down to only a few nanometers. They can simultaneously act as active components and interconnects and therefore fulfill the two basic functions of any active device. However, controlled doping of III-V nanowires is challenging due to strong Fermi-level pinning as well as the kinetic and thermodynamic ...

The charge state of Ag and Au atoms and clusters (Ag4 and Au4, Ag5 and Au5) adsorbed on defective TiO2 anatase(101) and tetragonal ZrO2(101) has been systematically investigated as a function of oxide doping and defectivity using a DFT+U approach. As intrinsic defects, we have considered the presence of oxygen vacancies. As extrinsic defects, substitutional nitrogen- and niobium-doping have bee...

Organic light-emitting electrochemical cells (LEC) are promising for lighting applications but in many cases these devices suffer from unbalanced electrochemical doping, which cause instability and degradation of the cells. A predominant p-doping over n-doping causes an off-centered emissive p-n junction, which leads to poor powerconversion efficiency. Here, we report a half-gate LEC transistor...

Although the issue of doping an substances is one of the very popular scientifi c topics in the world, these kinds of research are very rare in Croatia. Th is paper looks at some aspects of using doping and substances in sport and discusses the reasons which have been considered to be fundamental for the growth of this problem lately, based on the professional and scientifi c experience of the ...

The authors report the design and performance of a versatile carbon doping system for solid-source molecular beam epitaxy using carbon tetrabromide !CBr4". This system is capable to achieve three orders of magnitude in doping by changing the CBr4 temperature along with varying the CBr4 leak rate into the growth chamber. The CBr4 temperature is controlled using thermoelectric coolers and thus ca...