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Mott localization in a pure stripe antiferromagnet Rb1-δ Fe1.5-σ S2

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [1];  [2];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9]
  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). Advanced Light Source
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
  6. Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy
  7. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
  8. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences; Stanford Univ., CA (United States). Dept. of Physics and Applied Physics. Geballe Lab. for Advanced Materials
  9. Univ. of California, Berkeley, CA (United States). Dept. of Physics. Dept. of Materials Science and Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
+ Show Author Affiliations

A combination of neutron diffraction and angle-resolved photoemission spectroscopy measurements on a pure antiferromagnetic stripe $${\mathrm{Rb}}_{1{-}{\delta}}{\mathrm{Fe}}_{1.5{-}{\sigma}}{\mathrm{S}}_{2}$$ is reported here. A neutron diffraction experiment on a powder sample shows that a $98$% volume fraction of the sample is in the antiferromagnetic stripe phase with rhombic iron vacancy order and a refined composition of $${\mathrm{Rb}}_{0.66}{\mathrm{Fe}}_{1.36}{\mathrm{S}}_{2}$$, and that only $$2$$% of the sample is in the block antiferromagnetic phase with $$\sqrt{5}\times{}\sqrt{5}$$ iron vacancy order. Furthermore, a neutron diffraction experiment on a single crystal shows that there is only a single phase with the stripe antiferromagnetic order with the refined composition of $${\mathrm{Rb}}_{0.78}{\mathrm{Fe}}_{1.35}{\mathrm{S}}_{2}$$, while the phase with block antiferromagnetic order is absent. Angle-resolved photoemission spectroscopy measurements on the same crystal with the pure stripe phase reveal that the electronic structure is gapped at the Fermi level with a gap larger than 0.325 eV. The data collectively demonstrate that the extra $10$% iron vacancies in addition to the rhombic iron vacancy order effectively impede the formation of the block antiferromagnetic phase; the data also suggest that the stripe antiferromagnetic phase with rhombic iron vacancy order is a Mott insulator.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-05CH11231; SC0012311; AC02-76SF00515
OSTI ID:
1512245
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 12 Vol. 92; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (39)

A neutron and Mössbauer study of TlFexS2 compounds journal February 1986
Nodeless superconducting gap in AxFe2Se2 (A=K,Cs) revealed by angle-resolved photoemission spectroscopy journal February 2011
Enhancement of the superconducting transition temperature of FeSe by intercalation of a molecular spacer layer journal October 2012
Observation of superconductivity at 30∼46K in AxFe2Se2(A = Li, Na, Ba, Sr, Ca, Yb and Eu) journal May 2012
Superconductivity in the PbO-type structure  -FeSe journal September 2008
A Novel Large Moment Antiferromagnetic Order in K 0.8 Fe 1.6 Se 2 Superconductor journal August 2011
Interface-Induced High-Temperature Superconductivity in Single Unit-Cell FeSe Films on SrTiO 3 journal March 2012
Synthesis and crystal growth of Cs 0.8 (FeSe 0.98 ) 2 : a new iron-based superconductor with T c = 27 K journal January 2011
Superconductivity in the iron selenide K x Fe 2 Se 2 ( 0 ≤ x ≤ 1.0 ) journal November 2010
Superconductivity at 32 K in single-crystalline Rb x Fe 2 − y Se 2 journal February 2011
Electronic structure and Mott localization of iron-deficient TlFe 1 . 5 Se 2 with superstructures journal May 2011
Antiferromagnetic order and superlattice structure in nonsuperconducting and superconducting Rb y Fe 1.6 + x Se 2 journal September 2011
Phase relations in K x Fe 2 − y Se 2 and the structure of superconducting K x Fe 2 Se 2 via high-resolution synchrotron diffraction journal November 2012
Superconductivity in LiFeO 2 Fe 2 Se 2 with anti-PbO-type spacer layers journal January 2014
Structure and composition of the superconducting phase in alkali iron selenide K y Fe 1.6 + x Se 2 journal April 2014
Two spatially separated phases in semiconducting Rb 0.8 Fe 1.5 S 2 journal September 2014
Spin waves and spatially anisotropic exchange interactions in the S = 2 stripe antiferromagnet Rb 0.8 Fe 1.5 S 2 journal July 2015
Unconventional Superconductivity with a Sign Reversal in the Order Parameter of LaFeAsO 1 − x F x journal July 2008
Electronic Structures and Magnetic Order of Ordered-Fe-Vacancy Ternary Iron Selenides TlFe 1.5 Se 2 and A Fe 1.5 Se 2 ( A = K , Rb, or Cs) journal February 2011
Distinct Fermi Surface Topology and Nodeless Superconducting Gap in a ( Tl 0.58 Rb 0.42 ) Fe 1.72 Se 2 Superconductor journal March 2011
Mott Transition in Modulated Lattices and Parent Insulator of ( K , Tl ) y Fe x Se 2 Superconductors journal May 2011
Absence of a Holelike Fermi Surface for the Iron-Based K 0.8 Fe 1.7 Se 2 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy journal May 2011
Pressure-Driven Quantum Criticality in Iron-Selenide Superconductors journal May 2012
NMR Study in the Iron-Selenide Rb 0.74 Fe 1.6 Se 2 : Determination of the Superconducting Phase as Iron Vacancy-Free Rb 0.3 Fe 2 Se 2 journal June 2012
Neutron-Diffraction Measurements of an Antiferromagnetic Semiconducting Phase in the Vicinity of the High-Temperature Superconducting State of K x Fe 2 − y Se 2 journal December 2012
Observation of Temperature-Induced Crossover to an Orbital-Selective Mott Phase in A x Fe 2 − y Se 2 ( A = K , Rb) Superconductors journal February 2013
Neutron Scattering Measurements of Spatially Anisotropic Magnetic Exchange Interactions in Semiconducting K 0.85 Fe 1.54 Se 2 ( T N = 280     K ) journal April 2014
Electronic Identification of the Parental Phases and Mesoscopic Phase Separation of K x Fe 2 − y Se 2 Superconductors journal December 2011
Magnetic, transport, and optical properties of monolayer copper oxides journal July 1998
Colloquium : The unexpected properties of alkali metal iron selenide superconductors journal May 2013
Incommensurate Spin Fluctuations in High-Transition Temperature Superconductors journal August 1997
Tellurium substitution effect on superconductivity of the α-phase iron selenide journal October 2008
Fe-based superconductivity with T c =31 K bordering an antiferromagnetic insulator in (Tl,K) Fe x Se 2 journal April 2011
Tellurium substitution effect on superconductivity of the alpha-phase Iron Selenide text January 2008
Synthesis and crystal growth of Cs0.8(FeSe0.98)2: a new iron-based superconductor with Tc=27K text January 2010
Interface induced high temperature superconductivity in single unit-cell FeSe films on SrTiO3 text January 2012
Enhancement of superconducting transition temperature of FeSe by intercalation of a molecular spacer layer text January 2012
Synthesis and crystal growth of Cs0.8(FeSe0.98)2: a new iron-based superconductor withTc= 27 K text January 2011
Identification of Various Coexisting Phases in Superconducting and Non-superconducting Samples of Rb x Fe 2− y Se 2 journal April 2015

Cited By (7)

High-temperature superconductivity in iron pnictides and chalcogenides journal March 2016
Anisotropic magnetic excitations of a frustrated bilinear-biquadratic spin model: Implications for spin waves of detwinned iron pnictides journal January 2020
Elucidating the magnetic and superconducting phases in the alkali metal intercalated iron chalcogenides journal February 2016
Spin waves and magnetic exchange interactions in the spin-ladder compound RbFe 2 Se 3 journal July 2016
Orbital-selective Mott phase in multiorbital models for iron pnictides and chalcogenides journal September 2017
Orbital Selectivity Enhanced by Nematic Order in FeSe journal November 2018
High Temperature Superconductivity in Iron Pnictides and Chalcogenides text January 2016

Figures / Tables (5)

FIG. 1(p. 3)figure FIG. 1
TABLE I(p. 3)table TABLE I
FIG. 2(p. 4)figure FIG. 2
FIG. 3(p. 4)figure FIG. 3
FIG. 4(p. 5)figure FIG. 4

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY