the kondo effect in quantum dots

... using Hamiltonian (4) and the procedures as in the works [9-14], we obtain the quantum kinetic equation for electrons in the single (constant) scattering time approximation Then utilizing the ... parameters involved in the computation are the same as those in Fig In Fig we can see that the dependence of the HC on the amplitude E0 is nonlinear The HC parabolically increases with increasing amplitude ... shows the dependence of the HC on the external fields, including the EMW It is obtained for arbitrary values of the indices N ′ and N We can see that the analytical result appears very involved In...

Ngày tải lên: 31/10/2015, 10:41

Ngày tải lên: 12/01/2014, 22:06

... spectrum Interface Phonons in the Quantum Wire The interface phonon spectrum is being examined in [15] The general equations have been obtained to describe the phonon spectrum taking into account the ... us to use the model which takes into account this phonon type in the quantum wire The polar optical phonons we describe by the outline suggested in [16] Optical-phonon modes in the quantum wire ... The Polaron in the Quantum Wire We consider a cylindrical quantum wire with the radius q0 Let the quantum wire be surrounded with compositionally identical barriers In order to separate the effect...

Ngày tải lên: 21/06/2014, 07:20

... they just briefly mention it as a note in their article when referring to a small area in one of the images The investigators focused in their work on the bulk structures and their reduction The ... analysed at the edge of the crystal and with increasing distance from the edge, the analyses should show an increasing contribution from the bulk as the thickness of the amorphous layer being only ... figure) the corresponding catalyst after ageing in an industrial reactor from the edge of the analysed crystal For the unused catalyst the Mo/Fe ratio is the highest at the edge, where the ratio...

Ngày tải lên: 11/07/2014, 18:09

... 1999) In ewes, the ram effect has been extensively used to induce out-of-season estrus in order to obtain births during autumn (Martin et al 1986) Introducing rams to previously isolated ewes induces ... (minimum distance: 1,000 m) Ewes in the control group remained close to the pen where the rams were kept Intravaginal sponges containing 60 mg MAP (Syntex SA) were inserted in ewes of both groups on ... and the maximum diameter of the largest follicle during the period before ram introduction are presented in Table After introduction of the rams, the diameter of the largest follicle and the...

Ngày tải lên: 12/08/2014, 15:21

... level of individual enzymes, (b) the coupling of the enzymes within the organelles, and (c) the coupling of the energy transducing organelles within the cell Because the energy which drives the process ... in the metabolic rate of cells using OxPhos and cells using glycolysis derive primarily from the differences in the mode of coupling between the energy generated by the flow of electrons in the ... chain and ADP phosphorylation In OxPhos, the coupling is electrical and the metabolic rate is determined by the flow of protons across the mitochondrial inner membrane In glycolysis, the coupling...

Ngày tải lên: 13/08/2014, 16:20

... case of the RMR in the bulk semiconductor when the confinement frequency (ωo ) reaches to zero The Eq.(23) shows the dependence of the RMR on the external fields, including the EMW In the next ... CONCLUSIONS In this paper, we studied the influence of electromagnetic wave on the RMR in the quantum well with parabolic potential in the presence of the magnetic field The electronphonon interaction ... (5) → The frequency of the acoustic phonon is low so we can skip ω− q in the delta function in the Eq.(5) Considering the distribution of phonons to be symmetric, in the presence of the magnetic...

Ngày tải lên: 31/10/2015, 10:43

... techniques, the accuracy is in the range of 5–10% and depending on the errors in thermometry, errors in field setting, the quality of thermal insulation of the sample, the quality of the compensation ... larger in the single-crystalline manganite than that in the polycrystalline one as shown in Fig [80] More interestingly, the adiabatic temperature change (DTad) is larger in the single-crystalline ... could be attributed to the increase of the TC, while the slight decrease in the maximum DSM probably originates from the decrease of spin–lattice interaction Following this hypothesis, Phan et al...

Ngày tải lên: 21/12/2016, 10:24

... when the resonance energy of the lower levels is within the band gap, the system is in an absorbing state However, when the resonance energy of the lower levels is outside the band gap, the system ... where N0 is the p electron density, meff is the effective mass of the electron, e is the electron charge and e0 is the permittivity of the free space The damping rate (which is also called the electron ... to or smaller than the relevant skin depth of the corresponding metal, the EM wave can be transmitted by tunnelling through the structure The position of the PBG can be determined by selection...

Ngày tải lên: 22/06/2014, 00:20

... to describe inter-atomic forces by using bond stretching and bending The role of strain (for three different shapes) in determining the bound levels is analyzed in detail Considering three different ... calculation, the QDIP system is made up of InAs/GaAs So, the second term has the same impact on the strain distribution In the following, we will have a look at the relationship of the strain distribution ... band in the position The compressing and stretching condition of bottom in the pyramid QD is the same as the lens-shaped QD The difference of QD shape makes the strain distribution rather different,...

Ngày tải lên: 22/06/2014, 01:20

... modifying the spectral width With only 10% size variation increasing the potential confinement by using higher indium composition in the dots a spectral width of 230nm was predicted in the In0 .9Ga0.1As/GaAs ... nucleation sites for the impinging adatoms, reducing the combination/coalescence with the existing dots This resulted in the formation of denser dots with larger size inhomogeneity The achieved areal ... the carriers or strong electron–phonon interaction induces increasing of the kinetic energy of the charge carriers involved in the optical transitions In such cases, the optical transitions in...

Ngày tải lên: 26/06/2014, 23:21

... participated in the design and coordination of the study, contributed to the interpretation of data and drafting of the manuscript AO conceived the overall project and participated in the design of the ... with the controls To further clarify the results in terms of the mean fluorescence intensity of DCF, a normalized graphic representation was obtained (Fig 8f) Comparing the results of the three intensity ... flasks in order to obtain the final concentration of 100 nM in the culture medium Before adding the mercaptopropanoic Acid-QDs and every day after, viability of the cultures was checked using the...

Ngày tải lên: 11/08/2014, 00:22

... However, the acoustoelectric effect in the quantum wire still opens for studying, in this paper, we examine this effect in a cylindrical quantum wire with an infinite potential for the case of ... current in the cylindrical quantum wire with an infinite potential in the case degenerate electron gas, the expression only obtained if the condition in Eq.(14) is satisfied III NUMERICAL RESULTS In ... ±1, ±2, is the azimuth quantum number, m is the electron effective mass, R is the radius of the quantum wire, pz is the longitudinal (relative to the quantum wire axis) component of the quasi-momentum...

Ngày tải lên: 30/10/2015, 20:00

... different in ltrated zones at the indicated time points (Fig 1D) The extent of the HR in the PR zone was significantly suppressed as compared with that in the ParA1 zone In the ParA1 zone, the ion ... in the h group to  25% in the h group, and then the ratio rose drastically in the 12 h group, approximating to the level of ParA1 zones It is known that the fluorescence intensity of riboflavin ... be found, either in the light or in the dark (Fig 1A) To identify the most effective concentration of riboflavin for the suppression of the HR, ParA1 protein was mixed with riboflavin at concentrations...

Ngày tải lên: 15/03/2014, 00:20

... infection, re-added after infection and remained to virus harvest The results obtained following protocol i) are depicted in Figure 3a The antiviral effect due to interferon alone or in combination ... consequence of doubling the amount of IFN per culture As seen in Table 1, increasing the concentration of each IFN to 200 IU/ml did not augment the inhibitory effect These results indicate that HSV-2 ... formation Since there is no published data on the effect of IFNs on HSV-2 infection in Vero cells the capacity of human IFNα and/or IFN-γ to inhibit the replication of HSV-2 strains MS and G was initially...

Ngày tải lên: 20/06/2014, 01:20

... heterostructures The other supporting evidence of the type-II luminescence is the linear dependence of the PL peak energies over the third root of the excitation density [20] The inset of Figure 3b shows the ... feature of the type-I band transition Therefore, the interband transition of the GaSb QD would be the only proper origin of the high-energy peak In the growth process of the sample, the InGaAs cap ... be the reason that the PL intensity of the direct interband transition (type I) was strong as observed in the experiment So, these two peaks are identified as the indirect transition from the InGaAs...

Ngày tải lên: 20/06/2014, 20:20

... of the intra-dot doping, the dot charge nq is equal to the dot population n reduced by the number of dopants p in the dot, i.e., nq = n - p In the case of the inter-dot doping, the built -in- dot ... layers adjacent to the contacts Thus, the built -in- dot charge in QD layers from the third to the eighth is directly determined by the inter-dot doping In Table 1, we present the builtin-dot charge, ... depend on doping The pre-exponential factor in Equation describes the increase of the absorption with increasing number of electrons in the dot n The exponential factor describes the effect of potential...

Ngày tải lên: 20/06/2014, 22:20

... field threading the AB interferometer and S is the corresponding area of the quantum ring consisting of the double quantum dots and metallic electrodes The value S may be obtained in the previous ... widely investigated [25-29] In the present work, we investigate the spin-dependent thermoelectric effects of parallel-coupled double quantum dots embedded in an AB interferometer, in which the RSOI ... spectrum in the absence of the RSOI Using an inversion asymmetrical interface electric field, we can induce the RSOI in the QDs We find that the asymmetrical transmission node splits into two spindependent...

Ngày tải lên: 20/06/2014, 23:20

... With the increasing interest in the development of diverse nanomaterials, many researchers all over the world are pushing the envelope to expand the application of those versatile materials in the ... at 95°C for 10 min, then 55°C for 30 The particles coupled with streptavidin were added into the hybridization mixtures and incubated at 37°C for 10 and enriched in the bottom of the tube with ... performed the preparation of nanomaterials and the statistical analysis All authors read and approved the final manuscript Competing interests The authors declare that they have no competing interests...

Ngày tải lên: 21/06/2014, 01:20

... cultured in the cell culture medium containing μg/ mL adriamycin (Sigma) Both cell lines were maintained in RPMI-1640 medium containing 10% FCS, 100 U/ml of penicillin, and 100 μg/ml of streptomycin ... hepatoma model cell line in the development of new anti-tumor medicines [6] The classical Topo II inhibitor daunorubicin (DNR) is known as one of the most effective anti-cancer drugs on the market today ... from the Institute of Hematology of Tianjin, Chinese Academy of Medical Sciences (Tianjin, China) To develop the drugresistant cell line (HepG2/ADM), adriamycin was added to HepG2 cells in a...

Ngày tải lên: 21/06/2014, 03:20