California State University Los Angeles

Spin-Dependent Scattering of Electron Wave on Multi-Barrier Non Collinear System

Sahakyan A.S., Poghosyan A.V., Movsesyan R.M., Kocharian A.N., California State University Los Angeles, US

Spin-dependent scattering of electron wave on multi-barrier noncollinear system aA.S. Sahakyan, aA.V. Poghosyan, a R.M. Movsesyan, bA.N. Kocharian a National Polytechnic University of Armenia, Yerevan, Armenia bDepartment of Physics, California State University, Los Angeles, USA [...]

Magnetic Heterostructures with Tunable Spin-dependent Transport Properties

Sahakyan A.S., Poghosyan A.V., Movsesyan R.M., Kocharian A.N., California State University Los Angeles, US

The transport properties in magnetic films consisting of alternating magnetic nanolayers separated by nonmagnetic quantum wells are studied for a definite finite number of (N) magnetic barriers consisting of two branches of ferromagnetically ordered structures. [...]

Ferromagnetism and Giant Paramagnetism in Cu@C nanocomposites

Estiphanos M., Sharoyan E., Gyulasaryan H., Manukyan A., Mirzakhanyan A., Bernal O., Kocharian A., California State University Los Angeles, US

Different size copper nanoparticles coated by carbon are synthesized by solid phase pyrolysis of polycrystalline phthalocyanine (CuPc, Pc= C32N8H16). The structural properties of obtained powder products are characterized by XRD and Raman spectroscopy. The morphologies [...]

Resonance transmission of the electron wave through the nanofilms containing a magnetic quantum well

Sahakyan A.S., Movsesyan R.M., Kocharian A.N., California State University Los Angeles, US

The transmission of an electron wave through so called a magnetic resonance diode is considered in semiconductor nanofilms consisting of two nonmagnetic barriers separated by a quantum (magnetic) well subjected to an external magnetic field. [...]

Effect of circular dichroism in chiral photonic crystal liquid with enclosed defect layer inside

Gevorgyan A.H., Kocharian A.N., Vardanyan G.A., California State University Los Angeles, US

The photonic crystals of artificial and self-organizing structures with spatial periodic changes in dielectric and magnetic properties have attracted considerable interest recently due to unusual physical properties and wide practical applications. The chiral periodic structure [...]

Modeling of spontaneous phase separation in nanomaterials and confined systems with electron correlations

Kocharian A.N., Fang Kun, Fernando G.W., Balatsky A., California State University Los Angeles, US

The modeled of many body physics and possible spontaneous phase separation instabilities in various two-dimensional square and honeycomb structures (generated by periodically repeated Betts lattices) provide an ideal playground for understanding of various competing phases [...]

Electronic properties in two dimensional quantum rings consisting of two nanoelements

Sahakyan A.S., Movsesyan R.M., Kocharian A.N., California State University Los Angeles, US

Electron spectrum and ground state properties in two dimensional confined quantum rings with R(1,2) radiuses (R1 les R2), consisting of the two different (material) nanoelements divided by two sectored finite size quantum wells with various [...]

The manifestation of the one-dimensional non-collinear spin-dependent scattering on magnetized nano-element structures

Sahakyan A.S., Movsesyan R.M., Kocharian A.N., California State University Los Angeles, US

The transfer-matrix approach is used to investigate the scattering of spin-polarized electron and neutron waves on the simple magnetized nanoelement structures which energetic profiles presents a finite potential magnetic barrier, in particular, of rectangular form. [...]

Electron pairing instabilities and magnetic properties in nanoclusters and nanomaterials

Kocharian A.N., Fernando G.W., Fung K., Palandage K., California State University Los Angeles, US

Studies of assembled clusters, nanoparticles and optical lattices in various topologies provide intriguing insights into several many body problems in condensed matter physics1. A new, emerging guiding principle for the search of new materials can [...]

Electron instabilities in nanoclusters, nanostructures and inhomogeneous nanomaterials: bottom up approach

Kocharian A., California State University Los Angeles, US

Inhomogeneous nanomaterials with strong local electron correlations are creating a new world-view in condensed matter physics [1-4]. These materials with intrinsic ihomogeneities have electronic and magnetic properties that are widely different from the conventional materials. [...]