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Showing 1 to 12 of 12 for “"magnetic impurity"”.
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Effects of a single magnetic impurity on superconductivity
… in the vicinity of a single, iso- lated magnetic impurity has been probed experimentally with scanning tunneling spectroscopy by Yazdani et al.. Motivated by their experiment, we study the ef- fects of a single magnetic impurity on superconductivity by means of the mean-¯eld Bogoliubov-de …
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Electron tunneling into superconducting indium and lead films containing the magnetic impurity manganese
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T19:57:54Z No. of bitstreams: 1 1980_tsang.pdf: 3624550 bytes, checksum: 057faeeb584721949f4f58b3742e2067 (MD5)
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Field theoretical methods for strongly correlated electron systems
… slave-fermion technique to study the physics of magnetic impurities both in Quantum Antiferromagnets (in a flux phase) and in d-wave superconductors. This is a system consisting of a magnetic impurity coupled to either the low lying excitations of a flux phase, or to the normal quasi-particles …
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Transport and relaxation properties in anisotropic superconductors
… up at very low temperatures if resonant non-magnetic impurity scattering effect is included self-consistently in the calculations. The magnetic field effect on T1 is also studied, and we found that for high enough fields a new process, the pair creation process, will dominate the relaxation …
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Ionic model for chromium, manganese and iron impurities in copper
… lead us to conclude that an ionic model of the magnetic impurity is necessary to explain the data. We develop a model which assumes a definite 3dn configuration with a definite L-S ground state and includes intraconfigurationa1 energy level splittings due to a crystalline electric field and …
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Nanopartículas magnéticas adsorvidas em superfícies metálicas
Understand the physical properties of magnetic systems adsorbed in metallic surfaces is quite important for technological and scientific reasons. Here, this kind of system is studied theoretically by first principles calculations, based on the density functional theory (DFT), as well as by tight …
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Developing spectroscopic ellipsometry to study II-VI and diluted magnetic semiconductors
… ellipsometer (RAE) to study effects of magnetic and nonmagnetic doping on the £1 and £1 + .11 band gap energies in ZnSe-based II-VI semiconductors. To remove the natural surface oxide overlayer which distorts the intrinsic dielectric response of the sample, a chemical etching technique …
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Path integral methods for the large-N Kondo model
… to study the Kondo crossover as a function of magnetic field at zero temperature. Smooth and plausible crossover is found provided the magnetic field is introduced in a way which preserves degeneracy proportional toN, indicating that the failure to describe temperature crossover is not a …
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Nuclear magnetic resonance in single crystals of the dilute magnetic alloys: CuFe, CuCo, and CuNi
… they yield about the electronic structure of the magnetic impurity. Heretofore, there has been no detailed analysis since the identification of which satellite arises from which shell of neighboring nuclei was not possible. Field shifts of most observed satellites were sensitive to the orientation …
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Structural and electronic properties of transition metal nanoalloys and magnetic compounds
… system to study the interaction of a single magnetic impurity with a semiconducting host both experimentally and theoretically. The transition from exohedral (lowly coordinated) to endohedral (highly coordinated) doping that occurs for Si clusters with more than ten atoms, is accompanied by …
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Magnetic Studies of Impurity Configurations in Metals
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2011-07-06T19:57:35Z No. of bitstreams: 1 1972_rigert.pdf: 4759390 bytes, checksum: 16a1a37c713fb1732f4954d87f6a384b (MD5)
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Exploring the interplay between topological order, magnetism and superconductivity
… gate voltage) and spin imbalance (applied magnetic field). We find that the helical nature of the edge state gives rise to orders that are expected to be absent in non-chiral one-dimensional electronic systems. For repulsive interactions, the ordered state has an oscillatory spin texture …