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Lithium ion intercalation in thin crystals of hexagonal TaSe2 gated by a polymer electrolyte

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.5008623· OSTI ID:1503637
 [1];  [2];  [2];  [3];  [4];  [2];  [3];  [5]
  1. Shanghai Jiao Tong Univ., Shanghai (China); Key Laboratory of Artificial Structures and Quantum Control and Shanghai Center for Complex Physics, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  2. Shanghai Jiao Tong Univ., Shanghai (China)
  3. Tulane Univ., New Orleans, LA (United States)
  4. Shanghai Jiao Tong Univ., Shanghai (China); Huazhong Univ. of Science and Technology, Wuhan (China)
  5. Shanghai Jiao Tong Univ., Shanghai (China); Pennsylvania State Univ., University Park, PA (United States); Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)
Ionic liquid gating has been used to modify the properties of layered transition metal dichalcogenides (TMDCs), including two-dimensional (2D) crystals of TMDCs used extensively recently in the device work, which has led to observations of properties not seen in the bulk. The main effect comes from the electrostatic gating due to the strong electric field at the interface. In addition, ionic liquid gating also leads to ion intercalation when the ion size of the gate electrolyte is small compared to the interlayer spacing of TMDCs. However, the microscopic processes of ion intercalation have rarely been explored in layered TMDCs. Here, we employed a technique combining photolithography device fabrication and electrical transport measurements on the thin crystals of hexagonal TaSe2 using multiple channel devices gated by a polymer electrolyte LiClO4/Polyethylene oxide (PEO). The gate voltage and time dependent source-drain resistances of these thin crystals were used to obtain information on the intercalation process, the effect of ion intercalation, and the correlation between the ion occupation of allowed interstitial sites and the device characteristics. We found a gate voltage controlled modulation of the charge density waves and a scattering rate of charge carriers. Furthermore our work suggests that ion intercalation can be a useful tool for layered materials engineering and 2D crystal device design.
Research Organization:
Louisiana Board of Regents, Baton Rouge, LA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0012432
OSTI ID:
1503637
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 2 Vol. 112; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (9)

Morphology‐controlled Tantalum Diselenide Structures as Self‐optimizing Hydrogen Evolution Catalysts journal March 2020
Engineering of transition metal dichalcogenide-based 2D nanomaterials through doping for environmental applications journal January 2019
Doping engineering and functionalization of two-dimensional metal chalcogenides journal January 2019
In situ electrodeposition of polypyrrole onto TaSe 2 nanobelts quasi-arrays for high-capacitance supercapacitor journal January 2018
Angle-dependent magnetoresistance as a sensitive probe of the charge density wave in quasi-one-dimensional semimetal Ta 2 NiSe 7 journal November 2018
Dimensional reduction and ionic gating induced enhancement of superconductivity in atomically thin crystals of 2H-TaSe 2 journal November 2018
Influence of solid-state electrolyte on 2D SnS 2 field effect transistors journal May 2019
Ion intercalation engineering of electronic properties of two-dimensional crystals of 2 H − TaSe 2 journal October 2019
Angle-dependent magnetoresistance as a sensitive probe of the charge density wave in quasi-one-dimensional semimetal Ta$_2$NiSe$_7$ text January 2018

Figures / Tables (3)


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