Mott variable-range hopping transport in a MoS2 nanoflake.
RSC Adv
; 9(31): 17885-17890, 2019 Jun 04.
Article
in En
| MEDLINE
| ID: mdl-35520576
ABSTRACT
The transport characteristics of a disordered, multilayered MoS2 nanoflake in the insulator regime are studied by electrical and magnetotransport measurements. The MoS2 nanoflake is exfoliated from a bulk MoS2 crystal and the conductance G and magnetoresistance are measured in a four-probe setup over a wide range of temperatures. At high temperatures, we observe that ln G exhibits a -T -1 temperature dependence and the transport in the nanoflake dominantly arises from thermal activation. At low temperatures, where the transport in the nanoflake dominantly takes place via variable-range hopping (VRH) processes, we observe that ln G exhibits a -T -1/3 temperature dependence, an evidence for the two-dimensional (2D) Mott VRH transport. Furthermore, we observe that the measured low-field magnetoresistance of the nanoflake in the insulator regime exhibits a quadratic magnetic field dependence â¼ αB 2 with α â¼ T -1, fully consistent with the 2D Mott VRH transport in the nanoflake.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
RSC Adv
Year:
2019
Document type:
Article