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Title: Two spatially separated phases in semiconducting Rb 0.8 Fe 1.5 S 2

Abstract

We report neutron scattering and transport measurements on semiconducting Rb0.8Fe1.5S2, a compound isostructural and isoelectronic to the well-studied A0.8FeySe2(A = K, Rb, Cs, Tl/K) superconducting systems. Both resistivity and DC susceptibility measurements reveal a magnetic phase transition at T = 275 K. Neutron diffraction studies show that the 275 K transition originates from a phase with rhombic iron vacancy order which exhibits an in-plane stripe antiferromagnetic ordering below 275 K. In addition, the stripe antiferromagnetic phase interdigitates mesoscopically with an ubiquitous phase with √5 x√5 iron vacancy order. This phase has a magnetic transition at TN = 425 K and an iron vacancy order-disorder transition at TS = 600 K. These two different structural phases are closely similar to those observed in the isomorphous Se materials. Based on the close similarities of the in-plane antiferromagnetic structures, moments sizes, and ordering temperatures in semiconducting Rb0.8Fe1.5S2 and K0.81Fe1.58Se2, we argue that the in-plane antiferromagnetic order arises from strong coupling between local moments. Superconductivity, previously observed in the A0.8FeySe2₋ zSz system, is absent in A0.8Fe1.5S2, which has a semiconducting ground state. We discuss the implied relationship between stripe and block antiferromagnetism and superconductivity in these materials as well as a strategy for furthermore » investigation.« less

Authors:
 [1];  [2];  [1];  [2];  [3];  [4];  [5]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Physics
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
  4. Rice Univ., Houston, TX (United States). Department of Physics and Astronomy; Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics
  5. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1159437
Alternate Identifier(s):
OSTI ID: 1180514
Grant/Contract Number:  
AC05-00OR22725; AC02-05CH11231; AC03-76SF008; DMR-1362219
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 90; Journal Issue: 12; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Wang, Meng, Tian, Wei, Valdivia, P., Chi, Songxue, Bourret-Courchesne, E., Dai, Pengcheng, and Birgeneau, R. J. Two spatially separated phases in semiconducting Rb0.8Fe1.5S2. United States: N. p., 2014. Web. doi:10.1103/PhysRevB.90.125148.
Wang, Meng, Tian, Wei, Valdivia, P., Chi, Songxue, Bourret-Courchesne, E., Dai, Pengcheng, & Birgeneau, R. J. Two spatially separated phases in semiconducting Rb0.8Fe1.5S2. United States. https://doi.org/10.1103/PhysRevB.90.125148
Wang, Meng, Tian, Wei, Valdivia, P., Chi, Songxue, Bourret-Courchesne, E., Dai, Pengcheng, and Birgeneau, R. J. 2014. "Two spatially separated phases in semiconducting Rb0.8Fe1.5S2". United States. https://doi.org/10.1103/PhysRevB.90.125148. https://www.osti.gov/servlets/purl/1159437.
@article{osti_1159437,
title = {Two spatially separated phases in semiconducting Rb0.8Fe1.5S2},
author = {Wang, Meng and Tian, Wei and Valdivia, P. and Chi, Songxue and Bourret-Courchesne, E. and Dai, Pengcheng and Birgeneau, R. J.},
abstractNote = {We report neutron scattering and transport measurements on semiconducting Rb0.8Fe1.5S2, a compound isostructural and isoelectronic to the well-studied A0.8FeySe2(A = K, Rb, Cs, Tl/K) superconducting systems. Both resistivity and DC susceptibility measurements reveal a magnetic phase transition at T = 275 K. Neutron diffraction studies show that the 275 K transition originates from a phase with rhombic iron vacancy order which exhibits an in-plane stripe antiferromagnetic ordering below 275 K. In addition, the stripe antiferromagnetic phase interdigitates mesoscopically with an ubiquitous phase with √5 x√5 iron vacancy order. This phase has a magnetic transition at TN = 425 K and an iron vacancy order-disorder transition at TS = 600 K. These two different structural phases are closely similar to those observed in the isomorphous Se materials. Based on the close similarities of the in-plane antiferromagnetic structures, moments sizes, and ordering temperatures in semiconducting Rb0.8Fe1.5S2 and K0.81Fe1.58Se2, we argue that the in-plane antiferromagnetic order arises from strong coupling between local moments. Superconductivity, previously observed in the A0.8FeySe2₋ zSz system, is absent in A0.8Fe1.5S2, which has a semiconducting ground state. We discuss the implied relationship between stripe and block antiferromagnetism and superconductivity in these materials as well as a strategy for further investigation.},
doi = {10.1103/PhysRevB.90.125148},
url = {https://www.osti.gov/biblio/1159437}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 12,
volume = 90,
place = {United States},
year = {Fri Sep 26 00:00:00 EDT 2014},
month = {Fri Sep 26 00:00:00 EDT 2014}
}

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Cited by: 19 works
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Works referenced in this record:

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Works referencing / citing this record:

Block antiferromagnetism and possible ferroelectricity in KFe 2 Se 2
journal, September 2016


Iron-Based Chalcogenide Spin Ladder BaFe2X3 (X = Se,S)
journal, November 2019


High-temperature superconductivity in iron pnictides and chalcogenides
journal, March 2016


Gradual enhancement of stripe-type antiferromagnetism in the spin-ladder material BaFe 2 S 3 under pressure
journal, November 2018


Bandwidth and Electron Correlation-Tuned Superconductivity in Rb 0.8 Fe 2 ( Se 1 z S z ) 2
journal, December 2015