Phys. Rev. Lett. 92, 216802 (2004) [4 pages]Variable Range Hopping Conduction in Semiconductor Nanocrystal SolidsReceived 22 December 2003; published 25 May 2004 The temperature and electrical field dependent conductivity of n-type CdSe nanocrystal thin films is investigated. In the low electrical field regime, the conductivity follows σ∼exp[-(T*/T)1/2] in the temperature range 10<T<120 K. At high electrical field, the conductivity is strongly field dependent. At 4 K, the conductance increases by 8 orders of magnitude over one decade of bias. At a very high field, conductivity is temperature independent with σ∼exp[-(E*/E)1/2]. The complete behavior is very well described by variable range hopping with a Coulomb gap. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.216802
DOI:
10.1103/PhysRevLett.92.216802
PACS:
73.22.–f, 05.60.Cd, 73.50.Fq, 73.63.Kv
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.