A ten year perspective on diluted magnetic semiconductors and oxides pdf
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- A story of high-temperature ferromagnetism in semiconductors.
- Magnetic Oxide Semiconductors
- Advances in new generation diluted magnetic semiconductors with independent spin and charge doping
A story of high-temperature ferromagnetism in semiconductors.
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Handbook of Spintronics pp Cite as. In , it was theoretically predicted that ferromagnetism FM at high temperature could be obtained in many semiconductors such as ZnO, GaAs, GaN, etc. The magnetic ordering in those compounds was suggested to originate from the Ruderman—Kittel—Kasuya—Yoshida interaction of localized moments of dopants via 2 p holes or 4 s electrons. Actually, room temperature FM was observed; however, the phenomenon is not exactly as what theorists have proposed. The finding of FM in undoped HfO 2 thin films in has first given some alert to the magnetism community to rejudge the real role that a dopant indeed plays. Research on very thin films and nanoparticles of Diluted Magnetic Oxide semiconductors DMSO has pointed out that downscaling magnetic oxide semiconductors to nanometer scale should be an important step, in order to make them ferromagnetic.
E-mail: daniel. To study the potential of this material as a dilute magnetic semiconductor, we computationally investigate the structure, electronic, and magnetic properties of 3d transition metal TM doped plumbene using density functional theory DFT. For V, Mn, Fe, Co-doped systems with short inter-impurity distances, we obtain a Curie temperature above room temperature using the mean-field approximation, indicating the potential for magnetic storage and spintronics applications. Over the past decades, there have been many studies regarding the fundamental science of dilute magnetic semiconductors DMSs. The electronic and magnetic properties of 2D materials can be engineered with substitutional doping or adsorbing of TM elements, which can lead to DMSs in 2D semiconductors.
Magnetic Oxide Semiconductors
Can we build materials that show properties of both ferromagnets and semiconductors at room temperature? 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 magnetic semiconductors would also allow control of quantum spin state up or down. While many traditional magnetic materials, such as magnetite , are also semiconductors magnetite is a semimetal semiconductor with bandgap 0. To that end, dilute magnetic semiconductors DMS have recently been a major focus of magnetic semiconductor research. These are based on traditional semiconductors, but are doped with transition metals instead of, or in addition to, electronically active elements.
Have one ever seen a semiconductor that can issue two-color lasing lines? The diluted magnetic semiconductor DMS can do this. This finding opens a way to understand the collective behaviour of spin-coupled excitons in DMS and to find novel applications in the spin-related quantum technology. However, no one has ever detected dual lasing lines with large-separation issuing from one semiconductor structure at the same time because there are no different dense excitons of very different energy values except those semiconductor nanostructures in the optical cavity [ 4 , 5 ]. In contrast to the photon binding in an optical cavity, the local spontaneously ferromagnetic moments or coupled spins in a DMS structure supplied another choice to bind excitons to the collective EMP formation for single-mode lasing [ 6 , 7 ]. DMSs usually have the transition metal ion dopants and spin-dependent transport and magnetism [ 8 , 9 ]; however, their spin-related optical properties in bulk have seldom been studied except for their QDs [ 10 , 11 ] and QWs [ 12 , 13 ] because the incorporation of transition metal ions into semiconductor lattice could not produce a very uniform phase in macroscopic scales [ 14 ].
Advances in new generation diluted magnetic semiconductors with independent spin and charge doping
A ten-year perspective on dilute magnetic semiconductors and oxides Published on Dec 1, in Nature Materials Tomasz Dietl 53 Estimated H-index: View Paper. Add to Collection.
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Abstract: As one branch of spintronics, diluted magnetic semiconductors DMSs are extensively investigated due to their fundamental significance and potential application in modern information society. Alternatively, the discovery of a new generation DMSs with independent spin and charge doping, such as Ba,K Zn,Mn 2 As 2 briefly named BZA , attracted considerable attention due to their unique advantages in physical properties and heterojunction fabrication. The prospective of new type of DMSs with independent spin and charge doping is briefly discussed.