PMID- 29214268
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180719
LR  - 20180719
IS  - 2040-3372 (Electronic)
IS  - 2040-3364 (Linking)
VI  - 10
IP  - 1
DP  - 2017 Dec 21
TI  - Time-dependent transport characteristics of graphene tuned by ferroelectric 
      polarization and interface charge trapping.
PG  - 328-335
LID - 10.1039/c7nr06485c [doi]
AB  - Graphene-based field effect transistors (FETs) were fabricated by employing 
      ferroelectric Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3) (PMN-PT) as a gate insulator. The 
      co-existing effects of ferroelectric gating and interface charge trapping on the 
      transport properties of graphene were investigated with respect to the FET 
      structure. The sheet resistance (R(s)) of graphene shows a slight decay under a 
      small applied voltage, which is much less than the coercive voltage of the 
      ferroelectric PMN-PT, suggesting non-negligible charge trapping effects. 
      Moreover, when the applied voltage is increased up to a value larger than the 
      coercive voltage, R(s) exhibits three states: an initial rapid change, followed 
      by a slow nearly exponential evolution, and finally a saturated state either 
      during the applied voltage is retained or after it is released. In particular, a 
      high-resistance state is finally reached due to the ferroelectric gating, 
      implying that ferroelectric effects dominate this process. The underlying 
      physical mechanism was fully investigated to effectively address the observed 
      evolution of time-dependent R(s). Such a finding provides us an opportunity to 
      understand the co-existing effects of ferroelectric gating and charge trapping 
      and tune the transport properties of graphene through the interface effects.
FAU - Jie, Wenjing
AU  - Jie W
AD  - College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 
      China.
FAU - Hao, Jianhua
AU  - Hao J
LA  - eng
PT  - Journal Article
PL  - England
TA  - Nanoscale
JT  - Nanoscale
JID - 101525249
EDAT- 2017/12/08 06:00
MHDA- 2017/12/08 06:01
CRDT- 2017/12/08 06:00
PHST- 2017/12/08 06:00 [pubmed]
PHST- 2017/12/08 06:01 [medline]
PHST- 2017/12/08 06:00 [entrez]
AID - 10.1039/c7nr06485c [doi]
PST - ppublish
SO  - Nanoscale. 2017 Dec 21;10(1):328-335. doi: 10.1039/c7nr06485c.