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- W3100219396 abstract "We adapt the transfer matrix (T-matrix) method originally designed for one-dimensional quantum mechanical problems to solve the circularly symmetric two-dimensional problem of graphene quantum dots. Similar to one-dimensional problems, we show that the generalized T-matrix contains rich information about the physical properties of these quantum dots. In particular, it is shown that the spectral equations for bound states as well as quasi-bound states of a circular graphene quantum dot and related quantities such as the local density of states and the scattering coefficients are all expressed exactly in terms of the T-matrix for the radial confinement potential. As an example, we use the developed formalism to analyse physical aspects of a graphene quantum dot induced by a trapezoidal radial potential. Among the obtained results, it is in particular suggested that the thermal fluctuations and electrostatic disorders may appear as an obstacle to controlling the valley polarization of Dirac electrons." @default.
- W3100219396 created "2020-11-23" @default.
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- W3100219396 date "2016-05-23" @default.
- W3100219396 modified "2023-09-26" @default.
- W3100219396 title "The transfer matrix approach to circular graphene quantum dots" @default.
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- W3100219396 doi "https://doi.org/10.1088/0953-8984/28/27/275301" @default.
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