English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Coexistence of Superconductivity and Charge Density Waves in Tantalum Disulfide: Experiment and Theory

Kvashnin, Y., VanGennep, D., Mito, M., Medvedev, S. A., Thiyagarajan, R., Karis, O., et al. (2020). Coexistence of Superconductivity and Charge Density Waves in Tantalum Disulfide: Experiment and Theory. Physical Review Letters, 125(18): 186401, pp. 1-6. doi:10.1103/PhysRevLett.125.186401.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Kvashnin, Y.1, Author
VanGennep, D.1, Author
Mito, M.1, Author
Medvedev, S. A.2, Author           
Thiyagarajan, R.1, Author
Karis, O.1, Author
Vasiliev, A. N.1, Author
Eriksson, O.1, Author
Abdel-Hafiez, M.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Sergiy Medvediev, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863438              

Content

show
hide
Free keywords: Calculations; Charge density; Charge density waves; Electronic structure; Hydrostatic pressure; Phonons; Shear waves; Sulfur compounds; Superconducting transition temperature; Temperature distribution, Electronic topological transition; First-principles calculation; Lower critical field; Magnetictransport properties; Phonon instabilities; Temperature dependence; Undistorted structure; Vortex penetration, Tantalum compounds
 Abstract: The coexistence of charge density wave (CDW) and superconductivity in tantalum disulfide (2H-TaS2) at low temperature is boosted by applying hydrostatic pressures to study both vibrational and magnetic transport properties. Around Pc, we observe a superconducting dome with a maximum superconducting transition temperature Tc=9.1 K. First-principles calculations of the electronic structure predict that, under ambient conditions, the undistorted structure is characterized by a phonon instability at finite momentum close to the experimental CDW wave vector. Upon compression, this instability is found to disappear, indicating the suppression of CDW order. The calculations reveal an electronic topological transition (ETT), which occurs before the suppression of the phonon instability, suggesting that the ETT alone is not directly causing the structural change in the system. The temperature dependence of the first vortex penetration field has been experimentally obtained by two independent methods. While a d wave and single-gap BCS prediction cannot describe the lower critical field Hc1 data, the temperature dependence of the Hc1 can be well described by a single-gap anisotropic s-wave order parameter. © 2020 authors. Published by the American Physical Society.

Details

show
hide
Language(s): eng - English
 Dates: 2020-10-272020-10-27
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1103/PhysRevLett.125.186401
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 125 (18) Sequence Number: 186401 Start / End Page: 1 - 6 Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1