2024-03-29T11:31:18Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1482552017-12-18T13:57:16Zcom_10261_46com_10261_3col_10261_299
Buscemi, Fabrizio
Royo Valls, Miquel
Goldoni, Guido
Bertoni, Andrea
2017-04-11T09:03:53Z
2017-04-11T09:03:53Z
2016-04-04
Nanotechnology 27(19): 195201 (2016)
0957-4484
http://hdl.handle.net/10261/148255
10.1088/0957-4484/27/19/195201
http://dx.doi.org/10.13039/100009104
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100004834
We show how a proper radial modulation of the composition of core-multi-shell nanowires
(NWs) critically enhances the control of the free-carrier density in the high-mobility core with
respect to core−single-shell structures, thus overcoming the technological difficulty of fine
tuning the remote doping density. We calculate the electron population of the different NW
layers as a function of the doping density and of several geometrical parameters by means of a
self-consistent Schrödinger–Poisson approach: free carriers tend to localize in the outer shell and
screen the core from the electric field of the dopants.
eng
openAccess
Core-shell nanowires
Modulation doping
Tubular 2DEG
Electrostatic screening
Tailoring the core electron density in modulation-doped core−multi-shell nanowires
artículo