full
search.png

Search

close.png

Cancel

arrow
Volume 23, Issue 3
The Competition Between the CDW and the Superconducting State in Valence Skip Compounds

Izumi Hase, Takashi Yanagisawa & Kenji Kawashima

DOI: 10.4208/cicp.OA-2017-0060

Commun. Comput. Phys., 23 (2018), pp. 773-780.

Published online: 2018-03

Preview Purchase PDF 2356 38088

Cited by

google scholar semantic scholar
Export citation
  • Abstract

In some superconductors the charge density wave (CDW) state is adjacent to the superconducting state in the phase diagram. This CDW phase can be collapsed either pressure or by chemical doping, depending on compound. Among them, in so-called valence skip compounds, a large charge fluctuation with the large electron-phonon interaction is expected. We performed a first-principle study and investigated how the CDW gap is collapsed for several valence-skip compounds, i.e. SnX3, RbTlX3(X=F,Cl,Br,I) and CsTlI3. For all these compounds we found that the CDW gap is rather robust for the uniform volume change, and on the contrary, the magnitude of the CDW gap strongly depends on the position of the anion. We found that this CDW gap is already collapsed at ambient pressure in SnBr3, SnI3 and CsTlI3.

  • Keywords

Valence skip, CDW, superconductivity, electronic structure, RbTlX$_3$, SnX$_3$, BaBiO$_3$.

  • AMS Subject Headings

  • Copyright

COPYRIGHT: © Global Science Press

  • Email address
  • BibTex
  • RIS
  • TXT
@Article{CiCP-23-773, author = {Izumi Hase, Takashi Yanagisawa and Kenji Kawashima}, title = {The Competition Between the CDW and the Superconducting State in Valence Skip Compounds}, journal = {Communications in Computational Physics}, year = {2018}, volume = {23}, number = {3}, pages = {773--780}, abstract = {

In some superconductors the charge density wave (CDW) state is adjacent to the superconducting state in the phase diagram. This CDW phase can be collapsed either pressure or by chemical doping, depending on compound. Among them, in so-called valence skip compounds, a large charge fluctuation with the large electron-phonon interaction is expected. We performed a first-principle study and investigated how the CDW gap is collapsed for several valence-skip compounds, i.e. SnX3, RbTlX3(X=F,Cl,Br,I) and CsTlI3. For all these compounds we found that the CDW gap is rather robust for the uniform volume change, and on the contrary, the magnitude of the CDW gap strongly depends on the position of the anion. We found that this CDW gap is already collapsed at ambient pressure in SnBr3, SnI3 and CsTlI3.

}, issn = {1991-7120}, doi = {https://doi.org/10.4208/cicp.OA-2017-0060}, url = {http://global-sci.org/intro/article_detail/cicp/10547.html} }
TY - JOUR T1 - The Competition Between the CDW and the Superconducting State in Valence Skip Compounds AU - Izumi Hase, Takashi Yanagisawa & Kenji Kawashima JO - Communications in Computational Physics VL - 3 SP - 773 EP - 780 PY - 2018 DA - 2018/03 SN - 23 DO - http://doi.org/10.4208/cicp.OA-2017-0060 UR - https://global-sci.org/intro/article_detail/cicp/10547.html KW - Valence skip, CDW, superconductivity, electronic structure, RbTlX$_3$, SnX$_3$, BaBiO$_3$. AB -

In some superconductors the charge density wave (CDW) state is adjacent to the superconducting state in the phase diagram. This CDW phase can be collapsed either pressure or by chemical doping, depending on compound. Among them, in so-called valence skip compounds, a large charge fluctuation with the large electron-phonon interaction is expected. We performed a first-principle study and investigated how the CDW gap is collapsed for several valence-skip compounds, i.e. SnX3, RbTlX3(X=F,Cl,Br,I) and CsTlI3. For all these compounds we found that the CDW gap is rather robust for the uniform volume change, and on the contrary, the magnitude of the CDW gap strongly depends on the position of the anion. We found that this CDW gap is already collapsed at ambient pressure in SnBr3, SnI3 and CsTlI3.

Izumi Hase, Takashi Yanagisawa and Kenji Kawashima. (2018). The Competition Between the CDW and the Superconducting State in Valence Skip Compounds. Communications in Computational Physics. 23 (3). 773-780. doi:10.4208/cicp.OA-2017-0060
Copy to clipboard
BibteX RIS TXT
The citation has been copied to your clipboard