Issue 13, 2019
From the journal:

Nanoscale

Stabilizing the commensurate charge-density wave in 1T-tantalum disulfide at higher temperatures via potassium intercalation†

Rui Zhao, ORCID logo ab   Benjamin Grisafe,c   Ram Krishna Ghosh,cd   Ke Wang,e   Suman Dattac  and  Joshua Robinson*ab  

* Corresponding authors

a Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, USA
E-mail: jrobinson@psu.edu

b The Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA, USA

c Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN, USA

d Special Centre for Nanoscience, Jawaharlal Nehru University, New Delhi 110067, India

e Materials Research Institute, The Pennsylvania State University, University Park, PA, USA

Abstract

The 1T phase of tantalum disulfide (1T-TaS2) possesses a variety of charge-density-wave (CDW) orders, and as a result, it attracts an increasing amount of academic and technological interest. Researchers have devoted tremendous efforts towards understanding the impacts of doping, alloying, intercalation or other triggering agents on its charge density wave orders. In this work, we demonstrate that incorporating potassium chloride (KCl) during chemical vapor deposition (CVD) of TaS2 can control the phase (1T, 2H or metal nanowires) via the intercalation of potassium ions (K+) between TaS2 layers. Finally, we demonstrate that K+ not only impacts the structure during synthesis but also strongly impacts the CDW phase transition as a function of temperature, increasing the nearly commensurate (NCCDW) to commensurate (CCDW) transition to just below room temperature.

Graphical abstract: Stabilizing the commensurate charge-density wave in 1T-tantalum disulfide at higher temperatures via potassium intercalation

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Article information

DOI
https://doi.org/10.1039/C8NR09732A
Article type
Paper
Submitted
03 Dec 2018
Accepted
04 Mar 2019
First published
04 Mar 2019

Nanoscale, 2019,11, 6016-6022

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Stabilizing the commensurate charge-density wave in 1T-tantalum disulfide at higher temperatures via potassium intercalation

R. Zhao, B. Grisafe, R. K. Ghosh, K. Wang, S. Datta and J. Robinson, Nanoscale, 2019, 11, 6016 DOI: 10.1039/C8NR09732A

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