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Paper   IPM / Nano-Sciences / 17009
School of Nano Science
  Title:   Collective cloaking of a cluster of electrostatically defined core-shell quantum dots in graphene
  Author(s): 
1.  Mahdiyeh Sadrara
2.  MirFaez Miri
  Status:   Published
  Journal: JPCM
  Vol.:  34
  Year:  2022
  Pages:   115703
  Supported by:  IPM
  Abstract:
We study cloaking of a cluster of electrostatically defined core shell quantum dots in graphene. Guided by the generalized multiparticle Mie theory, the Dirac electron scattering from a cluster of quantum dots is addressed. Indeed distant quantum dots may experience a sort of individual cloaking. But despite the multiple scattering of an incident electron from a set of adjacent quantum dots, collective cloaking may happen. Via a proper choice of the radii and bias voltages of shells, two most important scattering coefficients and hence the scattering efficiency of the cluster dramatically decrease. Energy selective electron cloaks are realizable. More importantly, clusters simultaneously transparent to electrons of different energies, are achievable. Being quite sensitive to applied bias voltages, clusters of core shell quantum dots may be used to develop switches with high on off ratios.

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