English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Pressure-induced collapse of large-moment magnetic order and localized-to-itinerant electronic transition in the host-guest compound [Cs6CI][Fe24Se26]

Adler, P., Medvedev, S. A., Valldor, M., Naumov, P. G., ElGhazali, M. A., & Rüffer, R. (2020). Pressure-induced collapse of large-moment magnetic order and localized-to-itinerant electronic transition in the host-guest compound [Cs6CI][Fe24Se26]. Physical Review B, 101(9): 094433, pp. 1-9. doi:10.1103/PhysRevB.101.094433.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0006-3CE3-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-3CE5-5
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Adler, Peter1, Author              
Medvedev, Sergey A.2, Author              
Valldor, Martin3, Author              
Naumov, Pavel G.4, Author              
ElGhazali, Moaz A.4, Author              
Rüffer, Rudolf5, Author
Affiliations:
1Peter Adler, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863435              
2Sergiy Medvediev, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863438              
3Martin Valldor, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863454              
4Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
5External Organizations, ou_persistent22              

Content

show
hide
Free keywords: IRON; SUPERCONDUCTIVITYMaterials Science; Physics;
 Abstract: The magnetic properties of iron chalcogenides and pnictides have found much interest as magnetic fluctuations are suggested to drive the formation of Cooper pairs in iron-based superconductors. Here, we have studied the pressure dependence of the magnetic and electrical properties of the iron-selenide compound [Cs6Cl] [Fe24Se26] by energy-domain synchrotron Mossbauer spectroscopy up to 17 GPa and by resistivity measurements up to 45 GPa Similar to the binary superconductor Fe1+xSe, the host-guest-type crystal structure of [Cs6Cl] [Fe24Se26] contains edge-sharing FeSe4 units, but its ground state is antiferromagnetically ordered. A complex hyperfine pattern suggests a nontrivial spin structure like a spin spiral with large magnetic moments in the range 2 to 3 mu(B) at ambient pressure. High pressure drastically suppresses the Neel temperature from 220 K at ambient pressure to below 30 K at 12 GPa. Between 5 and 10 GPa the complex magnetic hyperfine pattern collapses and a low-moment magnetic ground state emerges at higher pressures. A concomitant decrease of the resistivity by several orders of magnitude indicates that the electronic system becomes more itinerant. Full metallization occurs near 25 GPa, but no sign of superconductivity down to 1.5 K was found at any pressure. It is suggested that the insulating ground state of [Cs6Cl] [Fe24Se26] corresponds to an orbitally selective Mott phase, which due to an increased bandwidth, is transformed into a Hund's metal state under pressure.

Details

show
hide
Language(s): eng - English
 Dates: 2020-03-312020-03-31
 Publication Status: Published in print
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 101 (9) Sequence Number: 094433 Start / End Page: 1 - 9 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008