Spontaneous skyrmion ground states in magnetic metals

Article Abstract:

A model shows that skyrmion textures might form spontaneously in condensed-matter systems with chiral interactions without the assistance of external fields or the proliferation of defects. The continuum model has implied that spontaneous skyrmion lattice ground states might exist in a large number of materials, notably at surfaces and in thin films, as well as in bulk compounds, where a lack of space inversion symmetry leads to chiral interactions.

Germany, Analysis, Chirality, Quantum Hall effect, Magnetic materials, Structure, Chemical properties, Magnetization

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Electron-phonon coupling reflecting dynamic charge inhomogeneity in copper oxide superconductors

Article Abstract:

The inelastic scattering measurements are presented that show a strong anomaly in the Cu-O bond-stretching phonon in the copper oxide superconductors La(sub 2-x)Sr(sub x)CuO4. The anomaly is strongest in La(sub 1.875)Ba(sub 0.125)CuO4 and La(sub 1.48)Nd(0.4)Sr(sub 0.12)CuO4, compounds that exhibit spatially modulated charge and magnetic order called stripe order where it occurs at a wave vector corresponding to the charge order.

Electric properties, Magnetic properties, Phonons, Copper oxide superconductors, Atomic properties, Spin coupling

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Partial order in the non-Fermi-liquid phase of MnSi

Article Abstract:

Fermi-liquid theory provides a basis for the description of different metallic phases. It is stated that, non-Fermi-liquid phases of metals may exist in some heavy fermions compounds.

United States, Models, Phase transformations (Statistical physics), Phase transitions (Physics), Fermi liquid

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