Oscillation Modes of Two-Dimensional Nanostructures within the Time-Dependent Local-Spin-Density Approximation

Antonio Puente, Llorenç Serra
1999 Physical Review Letters  
We apply the time-dependent local-spin-density approximation as general theory to describe ground states and spin-density oscillations in the linear response regime of two-dimensional nanostructures of arbitrary shape. For this purpose, a frequency analysis of the simulated real-time evolution is performed. The effect on the response of the recently proposed spin-density waves in the ground state of certain parabolic quantum dots is considered. They lead to the prediction of a new class of
more » ... a new class of excitations, soft spin-twist modes, with energies well below that of the spin dipole oscillation.
doi:10.1103/physrevlett.83.3266 fatcat:qdmxpgcn3baipenxk3uyfwgexq