نتایج جستجو برای: berry curvature
تعداد نتایج: 48983 فیلتر نتایج به سال:
We show that Weyl Fermi arcs are generically accompanied by a divergence of the surface Berry curvature scaling as $1/k^2$, where $k$ is distance to hot-line in Brillouin zone connects projection nodes with opposite chirality but which distinct from arc itself. Such appears whenever bulk dispersion has velocity tilt toward interest. This reflected variety mediated effects readily accessible exp...
Band geometry plays a substantial role in topological lattice models. The Berry curvature, which resembles the effect of magnetic field reciprocal space, usually fluctuates throughout Brillouin zone. Motivated by analogy with Landau levels, constant curvature has been suggested as an ideal condition for realizing fractional Chern insulators. Here we show that while cannot be made two-band model...
Molecular-beam epitaxy enables ultrathin functional materials to be combined in heterostructures create emergent phenomena at the interface. Magnetic skyrmions are an example of exciting phase found such heterostructures. SrRuO3 and SrRuO3-based have been center debate on whether a hump-like feature appearing Hall resistivities is sufficient evidence prove presence material. To address ambiguit...
Magnetization switching at the interface between ferromagnetic and paramagnetic metals, controlled by current-induced torques, could be exploited in magnetic memory technologies. Compelling questions arise regarding the role played in the switching by the spin Hall effect in the paramagnet and by the spin-orbit torque originating from the broken inversion symmetry at the interface. Of particula...
Optical gyrotropy, the lifting of degeneracy between left and right circularly polarized light, can be generated by either time-reversal or chiral symmetry breaking. In the high-Tc superconductor La2−xBaxCuO4 (LBCO), gyrotropy onsets at the same temperature as charge stripe order, suggesting that the rotation of the stripe direction from one plane to the next generates a helical pattern that br...
The topological structure of the wavefunctions of particles in periodic potentials is characterized by the Berry curvature Ωkn whose integral on the Brillouin zone is a topological invariant known as the Chern number. The bulk-boundary correspondence states that these numbers define the number of edge or surface topologically protected states. It is then of primary interest to find experimental...
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