/   Home   /   Newsroom   /   Research News

Study Leads to Further Understanding of Superconductivity of MoS2

Jun 29, 2018     Email"> PrintText Size

MoS2, a kind of synthetic chemical, is observed previously to present superconductivity at high pressures (namely surpressing 90 GPa).

However, what generates the superconductivity and how it is caused remain a mystery.

Chinese researchers at Hefei Institutes of Physical Science took a closer examination on it and they pushed the boundary further to understand it.

Actually, superconductivity always emerges with competing order restrained.

Charge density wave is such a competing order especially existing in transition-metal dichalcogenides.

For the further examination, they used electrical transport and Raman spectroscopy measurements of MoS2 at high pressures and low temperatures.

And as a result, they observed the charge density wave state shown by both hump in resistance and the additional mode in Raman spectra.

The observation of the charge density wave state may help to understand the mechanism of the superconductivity.

 

Raman data of MoS2 at temperature of 5.7 K and various pressures up to 80.0 GPa. (a) The 2D map of the Raman intensity at 5.7 K in the frequency-temperature coordinates. (b) Raman spectra at various pressures at 5.7 K. (c) The pressure dependence of the intensity of the E‘ mode at 5.7 K. The pressure dependence of the Raman frequencies of the E2 2g (d), A1g (e), and E1 2g (f) modes at 5.7 K. (Image by CAO Ziyu) 

Attachment:

(Editor: ZHANG Nannan)

Related Articles

charge density wave;low-dimensional materials;transition metal dichalcogenides

Researchers Manage to Manipulate Charge Density Wave in Monolayer Octahedral Titanium Diselenide

Nov 10, 2017

Recently, the research group led by Prof. SUN Yuping and Prof. LU Wenjian in the Functional Materials Laboratory at Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences made a new progress in the study of ...

low-temperature phase;charge density wave;orbital density wave;electronic correlation;orbital character;compound

Electronic Correlation and Orbital-density Wave (ODW) Play Important Roles in Formation of Low-temperature Phase, Study Shows

Nov 03, 2017

Electronic correlation and orbital-density wave (ODW) play important roles in the formation of the low-temperature phase, according to a study jointly conducted by ZOU Liangjian’s research group in Lab for Computational Materials Sciences at Institute...

superconductivity;oxygen doping;microscopic superconductivity

Researchers Uncover the Mechanism of Oxygen Doping Induced Superconductivity

Nov 15, 2017

Microscopic superconductivity mechanism of superconductors, one of the important functional materials, has remained a challenge. In a study published in Angew. Chem. Int. Ed., the research group led by Prof. DENG Shuiquan from Fujian Institute...

Contact Us

Copyright © 2002 - Chinese Academy of Sciences