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000859100 1001_ $$0P:(DE-Juel1)138943$$aKorte, Stefan$$b0
000859100 245__ $$aCharge transport in GaAs nanowires: interplay between conductivity through the interior and surface conductivity
000859100 260__ $$aBristol$$bIOP Publ.80390$$c2019
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000859100 520__ $$aThe charge transport through GaAs nanowires, partially p-doped and partially intrinsic, is analyzed by four-point resistance profiling along freestanding nanowires using a multip-STM. The charge transport channel in the undoped segment is assigned to the surface conductivity, while the interior of the nanowire is the conductance channel in the p-doped segment. The convoluted interplay between conduction through the interior of the nanowire and surface state conduction is studied in detail. Measurements of the I–V curves along the nanowires provide the experimental basis for the proposed charge transport model for the transition of the conduction from the interior to the surface of the nanowire. A voltage drop along the surface state conduction channel leads to an upward shift of the band edges at the surface. This results, for higher applied voltages, in the removal of the depletion layer and an opening of a conductance channel between the interior of the nanowire and the surface states.
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000859100 7001_ $$00000-0001-8978-7249$$aNägelein, Andreas$$b1
000859100 7001_ $$00000-0001-9226-3788$$aSteidl, Matthias$$b2
000859100 7001_ $$00000-0003-0249-5927$$aProst, Werner$$b3
000859100 7001_ $$0P:(DE-Juel1)128762$$aCherepanov, Vasily$$b4
000859100 7001_ $$0P:(DE-HGF)0$$aKleinschmidt, Peter$$b5
000859100 7001_ $$0P:(DE-HGF)0$$aHannappel, Thomas$$b6
000859100 7001_ $$0P:(DE-Juel1)128794$$aVoigtländer, Bert$$b7$$eCorresponding author
000859100 773__ $$0PERI:(DE-600)1472968-4$$a10.1088/1361-648X/aaf515$$gVol. 31, no. 7, p. 074004 -$$n7$$p074004 -$$tJournal of physics / Condensed matter Condensed matter$$v31$$x1361-648X$$y2019
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