Interfacial ferromagnetism in a Co/CdTe ferromagnet/semiconductor quantum well hybrid structure

Quantum-well-induced ferromagnetism in thin films

Interfacial structure and half-metallic ferromagnetism in Co2MnSi-based magnetic tunnel junctions

N. D. Telling,1 P. S. Keatley,2 G. van der Laan,1 R. J. Hicken,2 E. Arenholz,3 Y. Sakuraba,4 M. Oogane,4 Y. Ando,4 and T. Miyazaki4 1Magnetic Spectroscopy Group, CCLRC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom 2School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom 3Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 9...

Quantum Hall ferromagnetism in graphene.

Graphene is a two-dimensional carbon material with a honeycomb lattice and Dirac-like low-energy excitations. When Zeeman and spin-orbit interactions are neglected, its Landau levels are fourfold degenerate, explaining the 4e2/h separation between quantized Hall conductivity values seen in recent experiments. In this Letter we derive a criterion for the occurrence of interaction-driven quantum ...

Carrier density dependence of plasmon-enhanced nonradiative energy transfer in a hybrid quantum well-quantum dot structure.

An array of Ag nanoboxes fabricated by helium-ion lithography is used to demonstrate plasmon-enhanced nonradiative energy transfer in a hybrid quantum well-quantum dot structure. The nonradiative energy transfer, from an InGaN/GaN quantum well to CdSe/ZnS nanocrystal quantum dots embedded in an ~80 nm layer of PMMA, is investigated over a range of carrier densities within the quantum well. The ...

Pseudospin Quantum Hall Ferromagnetism

Symmetry breaking ground states occur in quantum Hall effect (QHE) systems when two or more Landau levels become degenerate near the Fermi level. Isotropic, easy-axis or easy plane quantum Hall ferromagnets (QHF) can form depending on the pseudospins of the involved Landau levels consisting of real spin, orbit radius quantum number, subband index or growth direction. Theories based on Hartree-F...