Báo cáo hóa học: " Electrostatically Shielded Quantum Confined Stark Effect Inside Polar Nanostructures" doc

... strengths Nanoscale Res Lett (2009) 4:993–1003 999 123 NANO EXPRESS Electrostatically Shielded Quantum Confined Stark Effect Inside Polar Nanostructures Spilios Riyopoulos Received: 5 December 2008 / Accepted: ... employing screened, exponentially decaying polarization potentials, localized at the edges of a QW, is introduced for the ES- shielded quantum confined Stark...

Ngày tải lên: 21/06/2014, 20:20

... 1b due to increased etching time. Higher quantum confine- ment is expected in sample B as compared to sample A. The possibility of quantum confinement effect in these Si NSs is investigated by ... density. This reveals that the asymmetry in Raman line-shape in Fig. 2b is not an effect of quantum confinement alone. Heating effect is ruled out because the laser power density is not hig...

Ngày tải lên: 21/06/2014, 22:20

... Illustration of the effect of catalytic materials: the nanostructures were synthesized without (a) and with (b) catalytic material Ni at 850 °C for 60 min. Illustration of the effect of reaction temperatures: ... a smallest value of diameter but a highest value of Young’s modulus, indicating a possible size effect [24]. The sample #2 and its fragments were repeatedly loaded three times,...

Ngày tải lên: 22/06/2014, 00:20

... [8] and Fermi-hole effects [9] that influence the evolution from the surface polarization spins to the diamagnetic bulk state. In this letter, we discuss the effects of surface polarization and ... nm. Magnetization Magnetization measurements were performed using the conventional superconducting quantum interference device (Quantum Design, MPMS5) set up with magnetic fields from -5 to 5 T,...

Ngày tải lên: 22/06/2014, 00:20

... [14]. In the quantum double quantum dots, the tunneling between single quantum d ots is crucial and the spin-orbit coupling makes the interdot tunn eling spi n-de pendent [15-17]. In quantum systems ... important for the understanding of the quantum pro- cesses in multiple quantum dots. In this article we consider various regimes for a one- dimensional double quantum dot with sp...

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 20:20

... magnetic flux as shown in Fig. 4b, where u is changed from p/2 to 5p/2. Since the Fano effect is a good probe for quantum phase coherence in mesoscopic structures, the tuning of its resonance position and ... devoted to this topic con- cerning both the charge and the spin-dependent Fano effect. But most previous works about the Fano effect in QDs ring ignored the Coulomb interaction [18...

Ngày tải lên: 22/06/2014, 01:20

... in quantum commu- nication as precisely controlled single photon emitters working at telecommunication bands. Keywords Quantum dot Æ Site-Control Æ Atomic-force microscope Æ Local oxidation Æ Quantum ... Atomic-force microscope Æ Local oxidation Æ Quantum computer Æ Quantum communication Introduction In general, self-assembled semiconductor quantum dots (QDs) grown in Stranski–Kra...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 18/06/2014, 15:20

Ngày tải lên: 18/06/2014, 15:20