English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Combined external pressure and Cu-substitution studies on BaFe2As2 single crystals

Piva, M. M., Besser, M., Mydeen, K., Garitezi, T. M., Rosa, P. F. S., Adriano, C., et al. (2015). Combined external pressure and Cu-substitution studies on BaFe2As2 single crystals. Journal of Physics: Condensed Matter, 27(14): 145701, pp. 1-5. doi:10.1088/0953-8984/27/14/145701.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-BF82-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-4C0E-7
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Piva, M. M.1, Author
Besser, M.2, Author              
Mydeen, K.3, Author              
Garitezi, T. M.1, Author
Rosa, P. F. S.1, Author
Adriano, C.1, Author
Grant, T.1, Author
Fisk, Z.1, Author
Urbano, R. R.1, Author
Nicklas, M.4, Author              
Pagliuso, P. G.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
3Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
4Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863472              

Content

show
hide
Free keywords: -
 Abstract: We report a combined study of external pressure and Cu-substitution on BaFe2As2 single crystals grown by the in-flux technique. At ambient pressure, the Cu-substitution is known to suppress the spin density wave (SDW) phase in pure BaFe2As2 (T-SDW approximate to 140 K) and to induce a superconducting (SC) dome with a maximum transition temperature T-c(max) similar or equal to 4.2 K. This T-c(max) is much lower than the T-c similar to 15-28 K achieved in the case of Ru, Ni and Co substitutions. Such a lower T-c is attributed to a Cu2+ magnetic pair-breaking effect. The latter is strongly suppressed by applied pressure, as shown herein, T-c can be significantly enhanced by applying high pressures. In this work, we investigated the pressure effects on Cu2+ magnetic pair-breaking in the BaFe2-xCuxAs2 series. Around the optimal concentration (x(opd) = 0.11), all samples showed a substantial increase of T-c as a function of pressure. Yet for those samples with a slightly higher doping level (over-doped regime), T-c presented a dome-like shape with maximum T-c similar or equal to 8K. Remarkably interesting, the under-doped samples, e.g. x = 0.02 display a maximum pressure induced T-c similar or equal to 30 K which is comparable to the maximum T-c's found for the pure compound under external pressures. Furthermore, the magnetoresistance effect as a function of pressure in the normal state of the x = 0.02 sample also presented an evolution consistent with the screening of the Cu2+ local moments. These findings demonstrate that the Cu2+ magnetic pair-breaking effect is completely suppressed by applying pressure in the low concentration regime of Cu2+ substituted BaFe2As2.

Details

show
hide
Language(s): eng - English
 Dates: 2015-03-19
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Physics: Condensed Matter
  Abbreviation : J. Phys.: Condens. Matter
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Bristol, UK : IOP Publishing
Pages: - Volume / Issue: 27 (14) Sequence Number: 145701 Start / End Page: 1 - 5 Identifier: ISSN: 0953-8984
CoNE: /journals/resource/954928562478