Unusually strong space-charge-limited current in thin wires

Abstract

The current-voltage characteristics of thin wires are often observed to be nonlinear, and this behavior has been ascribed to Schottky barriers at the contacts. We present electronic transport measurements on GaN nanorods and demonstrate that the nonlinear behavior originates instead from space-charge-limited current. A theory of space-charge-limited current in thin wires corroborates the experiments, and shows that poor screening in high aspect ratio materials leads to a dramatic enhancement of space-charge limited current, resulting in new scaling in terms of the aspect ratio.

4 pages, 3 figures, to appear in Physical Review Letters

References in corpus (1)

• Direct Measurement of the Spin-Orbit Interaction in a Two-Electron InAs Nanowire Quantum Dot

Cited by in corpus (7)

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• Poole-Frenkel Effect and Phonon-Assisted Tunneling in GaAs Nanowires
• Observation of Space-Charge-Limited Transport in InAs Nanowires
• Relativistic space-charge-limited current for massive Dirac fermions
• Polarization and Space Charge Limited Current in III-Nitride Heterostructure Nanowires
• Thermoelectric efficiency in the space-charge-limited transport regime in semiconductors
• Electric Current and Noise in Long GaN Nanowires in the Space-Charge Limited Transport Regime