نتایج جستجو برای: berry curvature
تعداد نتایج: 48983 فیلتر نتایج به سال:
We construct a theory for the semiclassical dynamics of superconducting quasiparticles by following their wave packet motion and reveal rich contents Berry curvature effects in phase space spanned position momentum. These curvatures are traced back to characteristics superconductivity, including nontrivial momentum-space geometry pairing, real-space supercurrent, charge dipole quasiparticles. T...
The anomalous Hall effect (AHE) in epitaxial Fe films on GaAs(111) has been investigated as a function of film thickness and temperature. The intrinsic contribution from the Berry curvature is singled out from the extrinsic ones and determined to be 821 −1 cm−1, which agrees to the theoretical prediction of 842 −1 cm−1 and is considerably smaller than 1100 −1 cm−1 for Fe(001). This result provi...
We have studied particle motion in generalized forms of noncommutative phase space, that simulate monopole and other forms of Berry curvature, that can be identified as effective internal magnetic fields, in coordinate and momentum space. The Ahranov-Bohm effect has been considered in this form of phase space, with operatorial structures of noncommutativity. Physical significance of our results...
Berry curvature, orbital moment, and effective quantum theory of electrons in electromagnetic fields
Berry curvature and orbital moment of the Bloch state are two basic ingredients, in addition to the band energy, that must be included in the formulation of semiclassical dynamics of electrons in crystals, in order to give proper account of thermodynamic and transport properties to first order in the electromagnetic field. These quantities are gauge invariant and have direct physical significan...
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