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Dr Sirichok Jungthawan (School of Physics, Suranaree University of Technology)School
The electronic structures of pristine graphene can be qualitatively described by tight-binding method. Tight-binding model is a simple method to understand the contributions of each atomic state. The method is helpful to investigate how chemical bonding, atomic arrangement, and structural symmetry reflect to the electronic structure of a system. Structural stability of monolayer graphene with...
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Dr Perkins Jon Ong (University of San Carlos)School
The damping of spin waves in high-Tc cuprate superconductors was analytically calculated using the spin polaron formulation in the finite temperature Green’s function scheme. This representation describes holes as spinless fermions and spins as normal bosons which are characterized by hard core bosonic operators obtained using the Holstein-Primakoff transformation. The interaction between the...
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Mr Horace Andrew Husay (National Institute of Physics - University of the Philippines)School
The access to clean and potable water is an important challenge especially in Southeast Asian countries that are surrounded by bodies of water. Water contaminants such as dye effluents pose health hazards even in trace amounts and need to be accurately detected and quantified. Among various analytical techniques, Raman spectroscopy is recently becoming popular as a tool for the detection of...
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Ms Neris Sombillo (Ateneo de Manila University and University of the Philippines Diliman)School
We simulate the optimized fixed-point quantum search (OFPQS) algorithm with first- and second-nearest neighbor interactions in a 4-qubit Ising spin system using a nonrefocusing technique. In order to perform a single qubit gate, we utilize the coupling interactions to control the neighboring spins. The phase-marking scheme of the OFPQS is implemented using a single rotation about the...
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Mr Gerald Angelo Catindig (National Institute of Physics)School
Strain can change the physical and electrical properties of semiconductors. While strain can induce defects on semiconductors, its impacts are not always negative. Strain has been incorporated into semiconductor heterostructures to produce long wavelength (~1.55 µm) gallium arsenide (GaAs) based lasers. The changes that strain can make on semiconductor electrical properties in particular allow...
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Prof. Tien Nguyen Thanh (Can Tho university)
In this work, electronic and transport properties of a pristine sawtooth penta-graphene nanoribbon (SSPGNR) and sawtooth penta-graphene nanoribbons doping with Silic, Nitrogen, Phosphor (Si-SSPGNR, N-SSPGNR, P-SSPGNR) are studied systematically by density-functional theory in combination with the non-equilibrium Green’s function formalism. Pristine sample and three doped samples in a similar...
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Ms Naomi Jane Jacosalem (Mindanao State University - Iligan Institute of Technology)School
A recent study on FeSe thin films grown on different substrates revealed that films on CaF$_2$ substrate has the maximum $\textit{T$_c$}$ ~15 K. However, the monolayer FeSe grown on SrTiO$_3$ (STO) substrate generated much research interest when superconductivity was observed at $\textit{T$_c$}$ above 100 K by means of $\textit{in situ}$ four-point probe electrical transport measurements....
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Dr Leo Cristobal C. Ambolode II (Department of Physics, Mindanao State University - Iligan Institute of Technology, Premier Research Institute of Science and Mathematics (PRISM), Mindanao State University - Iligan Institute of Technology)School
Doping and anion height are found to drastically affect the electronic structures of superconductors [1-2]. In this study, we investigated the composition-dependence of the electronic properties of the newly discovered intercalated TlFe$_{2}$Se$_{2}$ superconductor using density functional theory. We calculated the electronic structures of Tl$_{x}$Fe$_{2}$Se$_{2}$ with various Tl...
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Mr Vo Trung Phuc (Can Tho University)
The transport properties of sawtooth penta-graphene nanoribbons (SS-PGNRs) are investigated using density functional theory in combination with nonequilibrium Green function. The configurations are theoretically studied in terms of a bare edge and edges terminated by non-metallic atoms (H, P, Si) such as : symmetrical edge terminations (HH-SS-PGNR, PP-SS-PGNR and SiSi-SS-PGNR) and alternate...
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Prof. Ki-Seok Kim
We propose one concrete realization of the holographic duality conjecture, implementing Wilsonian renormalization group transformations in a recursive way.
In other words, starting from an effective ultraviolet (UV) boundary quantum theory,we derive its corresponding infrared (IR) bulk classical field theory,
which appears naturally in one-dimensional higher spacetime.It turns out that the...
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Prof. Jaeyoon Cho (APCTP)School
Understanding the nature of entanglement in strongly-correlated many-body systems is of prime importance in modern theoretical physics. In this lecture, I introduce the concept of entanglement entropies and the entanglement area law, and briefly review their implications in various topical issues. I then introduce a number of cases wherein the entanglement entropy can be analytically...
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Mr Rommil Emperado (National Institute of Physics, University of the Philippines Diliman)School
We deposit films from a bulk Bi-2212 target via femtosecond pulsed laser deposition. Smooth as-deposited films with large substrate coverage were grown on Si (100). The annealed films reveal crystallization in more than one direction. The XRD spectrum confirms that the annealed film is polycrystalline with some peaks that may have come from dissociated BSCCO compounds. Further testing will be...
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The present talk will discuss the computed results of electronic energy band structure, partial density states, total density of states and electronic charge density for nine MgZn-based metallic complexes: MgZnCo2, MgZnRh2, MgZnIr2, MgZnNi2, MgZnPd2, MgZnPt2, MgZnCu2, MgZnAg2, and MgZnAu2. The first principles electronic structure calculations is made by employing density functional theory as...
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Yagmur KatıSchool
We study spatiotemporal evolution of wave packets of resolved normal density and energy density in a disordered discrete nonlinear Schrodinger chain. We prepare initial wave packets containing multiple-site excitations of given norm density and energy density in different regions of the equilibrium phase diagram of the discrete nonlinear Schrodinger chain. Multiple site excitations can evolve...
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Mr Jerome Taguba (National Institute of Physics, University of the Philippines)School
Electrophoretic deposition of YBa2Cu3O7–δ is a promising non-vacuum method of film deposition due to its simplicity and scalability. In order to produce high quality films using this technique, it is necessary for the working suspension to be stable for long periods of time. In this study, we look at the interaction of YBCO and PbO2 particles when suspended in acetone. We determine if PbO2 is...
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Mr Meng Sun (Center for Theoretical Physics of Complex Systems, Institute for Basic Science ; Korea University of Science and Techonlogy)School
We investigate finite temperature electron conductivity in a hybrid system consisting of spatially separated two-dimensional layers of graphene and condensed indirect exciton gas coupled via the Coulomb interaction. We calculate the energy dependent relaxation time of the electrons in the graphene layer accompanied by the emission and absorption of a single Bogoliubov excitation (bogolon). We...
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Van Hoang Pham (Institute of Physics, Vietnam Academy of Science and Technology)School
We consider a model of DNA toroidal condensate that corresponds to a twisted bundle arrangement and compare it to other models of the chain conformation inside the condensate. The latter models correspond to those of a spool-like folding and a constant curvature bending. The ground states of the condensate in different models are obtained by minimizing a total energy given by the sum of the...
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Alexandra Santos-PutunganSchool
An ab initio density functional theory study was performed to investigate the adsorption of C and OH on small uni-metallic (Pt3 and Ni3) and bi-metallic (Pt2Re and Ni2Fe) clusters that could be potentially used for energy conversion applications. We observed that the HOMO-LUMO gaps show good stability and reactivity of the clusters. Furthermore, the introducing foreign atoms (Re and Fe)...
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Recently we proposed a new lasers-control scheme for unidirectional π-electron rotation in an aromatic ring molecule with low-symmetry having no degenerate electronic states [1]. In this control scheme we assumed a fixed nuclei condition, and two relevant excited states subject to dynamical Stark shift using two linearly polarized UV lasers. Each laser is set to selectively interact with one...
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