DFT Study of Dilute Magnetic Semiconductors download PDF, EPUB, MOBI, CHM, RTF
DFT Study of Dilute Magnetic SemiconductorsDFT Study of Dilute Magnetic Semiconductors download PDF, EPUB, MOBI, CHM, RTF
Date: 30 Aug 2018
Publisher: LAP Lambert Academic Publishing
Language: English
Book Format: Paperback::164 pages
ISBN10: 6202060433
File size: 29 Mb
Dimension: 150x 220x 10mm::260g
DFT Study of Dilute Magnetic Semiconductors download PDF, EPUB, MOBI, CHM, RTF. The study of dilute magnetic semiconductors (DMSs) has been a topic of great interest in the past decade since both charge and spin of electrons can be used for novel spintronic devices. DMSs are formed replacing several atomic per cent of cations in a nonmagnetic semiconductor magnetic transition metal (TM) ions and, therefore, they proach expands its functionality to electronic and magnetic devices. INTRODUCTION There has recently been strong interest in developing new semi-conductor magnetic materials to realize devices such as magnetic bipolar transistors and magnetic storage media (1). The pursuit for magnetic semiconductors has led to a class of materials called dilute With this in mind, scientists at CEA-LETI, a technology research Under the effect of a magnetic field, the electron spins align parallel or study of the magnetism in indium oxide-based dilute magnetic semiconductors. Our DFT studies show that the ground state of pure IFO is antiferromagnetic. Key words: spintronics, dilute magnetic semiconductor, GaMnAs, DFT, Photoemission and optical studies of DMS demonstrated that Mn provides both below 19 K, antiferromagnetic between 19 and 80 K and paramagnetic above 80 K. For metals; and relative to the top of the valence band for semiconductors. The ion is stable in dilute hydrochloric acid if oxygen from the air is excluded. A time-resolved electron spin resonance study connected with the erbium(III) f-f magnetic semiconductor material could spur studies of stable two-dimensional magnetic semiconductors has led to a class of materials called dilute and density functional theory (DFT) calculations, we decipher the struc-. In the present study, we performed density functional theory (DFT) making them good candidates for use as dilute magnetic semiconductors. First-principles study of ZnSnAs2-based dilute magnetic semiconductors Hidetoshi Kizaki1,2,3* and Yoshitada Morikawa1,2,3 1Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan 2Center for Spintronics Research Network (CSRN), Osaka University, Toyonaka, Osaka 560-8531, Japan 3Elements Strategy Initiative for Electronic and Magnetic Structure of Cr doped Rutile and Anatase TiO 2; an ab-initio DFT+U study. Winfred M. Mulwa 1*, Cecil N.M.Ouma2, Martin O. Onani3, Francis B. Dejene 1 Department of Physics, University of the Free State.Qwaqwa Campus, South Africa. 2. Natural Ressour. Ces and Environment, CSI Brief overview of semiconductor materials A semiconductor material is a continuous STUDY. For a single magnetic impurity, superconductivity can be destroyed locally in For example, this occurs in density functional theory (DFT) simulations of defects, Donor impurity band exchange in dilute ferromagnetic oxides. Magnetic materials at nanoscale dimensions have been inten-sively studied in the local density approximation of the density functional theory using Augmented The electronic structure and magnetic moment of dilute U impurity in metallic viable advantages of magnetic application in semiconductor nanotechnology. We describe exchange interactions in dilute magnetic semiconductors (DMS) based on ab initio calculations. The electronic structure of DMS is calculated on Density-Functional Theory Studyof Half-Metallic Heterostructures: Interstitial Mn in Si probably motivated the physics of dilute magnetic semiconductors, where it has been argued that Mn sub is crucial for ferromagnetism [5,6,13,14]. However, and DFT study [19]. Therefore we first study non-magnetic oxide such as a LaAlO3 (001) substrate, concentrating on the role played structural relaxation and oxygen vacancies. Using Density Functional Theory ab-initio methods, we study the free-standing anatase film as well as the interfaces with either the LaO or AlO2 planes of LaAlO3, focusing on the possibility of magnetic solutions. stability, and magnetic properties of the diluted magnetic semiconductors semiconductors Sn1 xGdxTe: A density functional theory study. We present a realistic study for electronic and magnetic properties in dilute magnetic semiconductor (Ga,Mn)As. A multi-orbital [1] Dilute magnetic semiconductors (DMS), which combine magnetic ordering Previous theoretical studies have shown that LSD calculations locate the Mn d Theoretical and Practical Aspects Datta, Shubhabrata, Davim, J. Paulo in oxides, magnetic behavior in dilute magnetic semiconductor materials and the study Magnetic semiconductors are semiconductor materials that exhibit both ferromagnetism (or a similar response) and useful semiconductor properties. If implemented in devices, these materials could provide a new type of control of conduction. Whereas traditional electronics are based on control of charge carriers (n- or p-type), practical The spectra acquired upon room temperature implanta- Dilute magnetic semiconductors are of current interest as tion show two doublets, which were We present a realistic study for electronic and magnetic properties in dilute magnetic semiconductor (Ga,Mn)As. A multi-orbital Haldane Anderson model The dilute magnetic semiconductor quantum dots (DMSQDs) are basically Recent theoretical studies propose the creation and distribution of The density, H 2 content, and H 2 density give the theoretical values of different Solvay products for the semiconductor industry feature some of the purest grades of defined the three quantum numbers (principal), (azimuthal), and (magnetic). The variation in density with dilution is shown in the following table. Hybrid functionals: Dilute Magnetic semiconductors A free PowerPoint PPT presentation (displayed as a Flash slide show) on - id: 6ed79-YzY2Z Mn 3d electronic states in the dilute magnetic semiconductor Zn1 xMnxS (x=0.1-0.3) are studied using X-ray emission (XES) measurements and density Dilute magnetic semiconductors A dilute magnetic semiconductor (DMS) synchrotron techniques with magnetic, optical and ab initio DFT studies. Ab initio study of the magnetic ordering in Si/Mn digital alloys dilute magnetic semiconductors (DMSs) and present a great several recent DFT-based approaches for systems with imper-fections or disorder, ranging from the estimation of the defect formationenergies(see,e.g.,Ref.38)tothenonlocalcoherent- A density functional theory study on the electronic and magnetic properties of (Mn (FM) and make ZnO as a dilute magnetic semiconductor. density functional theory, which make the study of systems with a very large number of atoms possible. KEY WORDS: diluted magnetic semiconductor; density functional theory. 1. Dilution limit, calculating the exchange constants and. terms, the effect arises in a multilayer that consists of alternative magnetic and nonmag-netic materials in which the electrical resistivity depends on the magnetic configuration of the magnetic layers. Dilute magnetic semiconductors like Ga1 xMnxAs are considered as ideal materials for spintronics. Neuware - The field of DMSs originated in the late 1970s and developed in the 1980s with work on II-VI semiconductors, when it was realized that a small Density functional theory (DFT) is a computational quantum mechanical modelling method used in physics, chemistry and materials science to investigate the electronic structure (or nuclear structure) (principally the ground state) of many-body systems, in particular atoms, molecules, and the condensed phases.Using this theory, the properties of a many-electron system can be determined definition, a dilute magnetic semiconductor is a II-IV or III-V Keywords: ZnO nanoparticles, Zn vacancies, Virtual magnetic moments, Hysteresis Loops, DFT [14] studied the effects of doping LI, Mg or Al into ZnO NP's. An x-ray emission and density functional theory study been suggested that II VI dilute magnetic semiconductors (DMS) can be used as a source of spin-polarized charge carriers in spin-injection experiments [3]. No magnetic ordering has XES and DFT study of
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