We demonstrate the microscopic role of oxygen vacancies spatially confined within nanometer inter-spacing (about 1 nm) in BiFeO3, using resonant soft X-ray scattering techniques and soft X-ray spectroscopy measurements. Such vacancy confinements and total number of vacancy are controlled by substitution of Ca(2+) for Bi(3+) cation. We found that by increasing the substitution, the in-plane orbi...

Spin and charge fluctuations and superconductivity in Na0.35CoO2·1.3H2O are studied based on a multi-orbital Hubbard model. By applying the fluctuation exchange (FLEX) approximation, we show that the Hund’s-rule coupling between the Co t2g orbitals causes ferromagnetic spin fluctuation. Triplet pairing is favored by this ferromagnetic fluctuation on the hole-pocket band. We propose that, in Na0...

We describe a peculiar fine structure acquired by the in-plane optical phonon at the Gamma point in graphene when it is brought into resonance with one of the inter-Landau-level transitions in this material. The effect is most pronounced when this lattice mode (associated with the G band in graphene Raman spectrum) is in resonance with inter-Landau-level transitions 0 --> +, 1 and -, 1 --> 0, a...

In the title complex, [HgI2(C21H19N5)2], the Hg(II) ion is located on a twofold rotation axis and is coordinated by two I atoms and two N atoms from two (E)-2-{5,5-di-methyl-3-[4-(1H-1,2,4-triazol-1-yl)styr-yl]cyclo-hex-2-enyl-idene}malono-nitrile ligands in a distorted tetra-hedral geometry. In the crystal, the mol-ecules are linked by inter-molecular π-π inter-actions between the triazole and...

A model describing the anisotropic electron mobility in strained Si has been developed. Our analytical model includes the effect of strain-induced splitting of the conduction band valleys in Si, inter-valley scattering, and doping dependence. Monte Carlo simulations were performed to verify the results for the complete range of Ge contents and for a general orientation of the SiGe buffer. Our m...

In this paper, a new image-reject low noise amplifier is designed for the 2.4 GHz industrial-scientific-medical (ISM) band. An inter-stage T-structure filter is used in the low noise amplifier design to provide 35-dB image rejection. The goal of this design is to merge the image-reject function into the low noise amplifier.

Objective- This study described the ultrasonographic features of the testes in West African Dwarf bucks.Design- Experimental studyProcedure- Ultrasonographic images of testes of WAD bucks were acquired in longitudinal, sagittal and transverse planes using a Draminski 5MHz portable ultrasound machine after proper restraint of the bucks and gel application on the scrotum. Animal...

We present an active, purely mechanical stress wave isolator that consists of short cylindrical particles arranged in a helical architecture. This phononic structure allows us to change inter-particle stiffness dynamically by controlling the contact angles of the cylinders. We use torsional travelling waves to control the contact angles, thereby imposing a desired spatio-temporal stiffness vari...

We show that carbon nanotubes (CNs) offer a testing ground to study the fundamentals of condensed matter physics in one dimension (1D). Specifically, we discuss possibilities for the 1D Bose-Einstein condensation (BEC) phenomenon that originates from the strong coupling of excitons and low-energy inter-band plasmons enabled via the quantum confined Stark effect by using an external electrostati...

Solution accuracy of global navigation satellite systems (GNSS) is often compromised by the satellite-user geometry, weak signal levels and system outages. Locata Corporation’s positioning technology potentially bridges such gaps in availability, providing cm-level accuracy in challenging positioning environments. A Locata network consists of timesynchronized terrestrial transceivers (called Lo...