Title: Pressure-induced electronic phase separation of magnetism and superconductivity in CrAs

Journal Article · · Scientific Reports
DOI: https://doi.org/10.1038/srep13788 · OSTI ID:1259706
 [1];  [1];  [2];  [1];  [1];  [1];  [3];  [4];  [4];  [5];  [1]
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  2. Ruhr-Univ. Bochum, Bochum (Germany); Federal Univ., Kazan (Russia)
  3. Paul Scherrer Inst. (PSI), Villigen (Switzerland); Univ. of Geneva, Geneva (Switzerland)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. ETH Zurich, Zurich (Switzerland)
+ Show Author Affiliations

We report that the recent discovery of pressure (p) induced superconductivity in the binary helimagnet CrAs has raised questions on how superconductivity emerges from the magnetic state and on the mechanism of the superconducting pairing. In the present work the suppression of magnetism and the occurrence of superconductivity in CrAs were studied by means of muon spin rotation. The magnetism remains bulk up to p ≃ 3.5 kbar while its volume fraction gradually decreases with increasing pressure until it vanishes at p ≃ 7 kbar. At 3.5 kbar superconductivity abruptly appears with its maximum Tc ≃ 1.2 K which decreases upon increasing the pressure. In the intermediate pressure region (3.5≲ p ≲ 7 kbar) the superconducting and the magnetic volume fractions are spatially phase separated and compete for phase volume. Our results indicate that the less conductive magnetic phase provides additional carriers (doping) to the superconducting parts of the CrAs sample thus leading to an increase of the transition temperature (Tc) and of the superfluid density (ρs). A scaling of ρs with Tc3.2 as well as the phase separation between magnetism and superconductivity point to a conventional mechanism of the Cooper-pairing in CrAs.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1259706
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (70)

Properties of binary transition-metal arsenides ( T As) journal July 2012
Competing order and nature of the pairing state in the iron pnictides journal July 2010
Basic similarities among cuprate, bismuthate, organic, Chevrel-phase, and heavy-fermion superconductors shown by penetration-depth measurements journal May 1991
Magnetic phase diagram in some Kondo-lattice compounds: microscopic and macroscopic studies text January 2001
Coexistence of Magnetism and Superconductivity in the Iron-based Compound Cs_0.8(FeSe_0.98)_2 text January 2011
Spin Waves and magnetic exchange interactions in insulating Rb$_{0.89}$Fe$_{1.58}$Se$_2$ text January 2011
Universal scaling relations in molecular superconductors text January 2004
First order crystallographic and magnetic phase transition in CrAs journal October 1971
Universal scaling relations in molecular superconductors journal January 2007
Spin waves and magnetic exchange interactions in insulating Rb0.89Fe1.58Se2 journal September 2011
Superconductivity in the vicinity of antiferromagnetic order in CrAs journal November 2014
Phase separation and magnetic order in K-doped iron selenide superconductor journal November 2011
Magnetic Structure of CrAs and Mn‐Substituted CrAs journal March 1969
A Novel Large Moment Antiferromagnetic Order in K 0.8 Fe 1.6 Se 2 Superconductor journal August 2011
A Novel Large Moment Antiferromagnetic Order in K 0.8 Fe 1.6 Se 2 Superconductor journal August 2011
Properties of binary transition-metal arsenides ( T As) journal July 2012
Flux distribution and penetration depth measured by muon spin rotation in high-T_{c} superconductors journal February 1988
Muon-spin-rotation studies of the temperature dependence of the magnetic penetration depth in the YBa 2 Cu 3 O x family and related compounds journal July 1995
11 B NMR and relaxation in the MgB 2 superconductor journal June 2001
NMR spectroscopy of the normal and superconducting states of MgB 2 and comparison to AlB 2 journal September 2002
Correlation between the transition temperature and the superfluid density in BCS superconductor NbB 2 + x journal February 2008
Muon spin rotation studies of SmFeAsO 0.85 and NdFeAsO 0.85 superconductors journal September 2008
Enhanced superfluid stiffness, lowered superconducting transition temperature, and field-induced magnetic state of the pnictide superconductor LiFeAs journal February 2009
Superconducting state coexisting with a phase-separated static magnetic order in ( Ba , K ) Fe 2 As 2 , ( Sr , Na ) Fe 2 As 2 , and CaFe 2 As 2 journal July 2009
Competing order and nature of the pairing state in the iron pnictides journal July 2010
Transport properties and anisotropy of Rb 1 − x Fe 2 − y Se 2 single crystals journal May 2011
High-pressure flux growth, structural, and superconducting properties of L n FeAsO ( L n = Pr, Nd, Sm) single crystals journal December 2012
Photoemission and muon spin relaxation spectroscopy of the iron-based Rb 0.77 Fe 1.61 Se 2 superconductor: Crucial role of the cigar-shaped Fermi surface journal October 2013
Pressure dependence of the magnetic order in CrAs: A neutron diffraction investigation journal January 2015
Structural and magnetic phase diagram of CrAs and its relationship with pressure-induced superconductivity journal February 2016
Field and Temperature Dependence of the Superfluid Density in LaFeAsO 1 − x F x Superconductors: A Muon Spin Relaxation Study journal August 2008
Coexistence of Magnetism and Superconductivity in the Iron-Based Compound Cs 0.8 ( FeSe 0.98 ) 2 journal March 2011
Detection of an Unconventional Superconducting Phase in the Vicinity of the Strong First-Order Magnetic Transition in CrAs Using As 75 -Nuclear Quadrupole Resonance journal March 2015
Universal Correlations between T c and n s m * (Carrier Density over Effective Mass) in High- T c Cuprate Superconductors journal May 1989
Basic similarities among cuprate, bismuthate, organic, Chevrel-phase, and heavy-fermion superconductors shown by penetration-depth measurements journal May 1991
Nuclear Magnetic Resonance of A 3 C 60 Superconductors journal February 1995
Universal Scaling Relations in Molecular Superconductors journal March 2005
Flux distribution and penetration depth measured by muon spin rotation in high-T_{c} superconductors journal February 1988
Muon-spin-rotation studies of the temperature dependence of the magnetic penetration depth in the YBa 2 Cu 3 O x family and related compounds journal July 1995
11 B NMR and relaxation in the MgB 2 superconductor journal June 2001
NMR spectroscopy of the normal and superconducting states of MgB 2 and comparison to AlB 2 journal September 2002
Correlation between the transition temperature and the superfluid density in BCS superconductor NbB 2 + x journal February 2008
Muon spin rotation studies of SmFeAsO 0.85 and NdFeAsO 0.85 superconductors journal September 2008
Enhanced superfluid stiffness, lowered superconducting transition temperature, and field-induced magnetic state of the pnictide superconductor LiFeAs journal February 2009
Superconducting state coexisting with a phase-separated static magnetic order in ( Ba , K ) Fe 2 As 2 , ( Sr , Na ) Fe 2 As 2 , and CaFe 2 As 2 journal July 2009
Competing order and nature of the pairing state in the iron pnictides journal July 2010
Transport properties and anisotropy of Rb 1 − x Fe 2 − y Se 2 single crystals journal May 2011
High-pressure flux growth, structural, and superconducting properties of L n FeAsO ( L n = Pr, Nd, Sm) single crystals journal December 2012
Photoemission and muon spin relaxation spectroscopy of the iron-based Rb 0.77 Fe 1.61 Se 2 superconductor: Crucial role of the cigar-shaped Fermi surface journal October 2013
Pressure dependence of the magnetic order in CrAs: A neutron diffraction investigation journal January 2015
Structural and magnetic phase diagram of CrAs and its relationship with pressure-induced superconductivity journal February 2016
Field and Temperature Dependence of the Superfluid Density in LaFeAsO 1 − x F x Superconductors: A Muon Spin Relaxation Study journal August 2008
Coexistence of Magnetism and Superconductivity in the Iron-Based Compound Cs 0.8 ( FeSe 0.98 ) 2 journal March 2011
Detection of an Unconventional Superconducting Phase in the Vicinity of the Strong First-Order Magnetic Transition in CrAs Using As 75 -Nuclear Quadrupole Resonance journal March 2015
Universal Correlations between T c and n s m * (Carrier Density over Effective Mass) in High- T c Cuprate Superconductors journal May 1989
Basic similarities among cuprate, bismuthate, organic, Chevrel-phase, and heavy-fermion superconductors shown by penetration-depth measurements journal May 1991
Basic Similarities among Cuprate, Bismuthate, Organic, Chevrel-Phase, and Heavy-Fermion Superconductors Shown by Penetration-Depth Measurements journal April 1992
Nuclear Magnetic Resonance of A 3 C 60 Superconductors journal February 1995
Universal Scaling Relations in Molecular Superconductors journal March 2005
Nuclear Relaxation Study in Strong Coupling Superconductors –A Comparison with High- T c Superconductors– journal September 1992
Nuclear Relaxation Study in Strong Coupling Superconductors –A Comparison with High- T c Superconductors– journal September 1992
Magnetic Structure and Properties of CrAs. journal January 1971
Competing order and nature of the pairing state in the iron pnictides text January 2010
Superconductivity in the vicinity of antiferromagnetic order in CrAs text January 2014
Pressure dependence of the magnetic order in CrAs: a neutron diffraction investigation text January 2014
Structural and Magnetic Phase Diagram of CrAs and its Relationship with Pressure-induced Superconductivity text January 2014
$^{11}B$ NMR and Relaxation in $MgB_2$ Superconductor text January 2001
Correlation between the transition temperature and the superfluid density in BCS superconductor NbB2+x interactiveresource January 2008
Superconductivity of 2.2 K under Pressure in Helimagnet CrAs journal September 2014
Superconductivity of 2.2 K under Pressure in Helimagnet CrAs journal September 2014

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Why paramagnetic chiral correlations in the long wavelength limit do not contribute to muon-spin relaxation text January 2020
Electronic structure, phonon and superconductivity for WP 5 d -transition metal journal November 2019
High pressure research using muons at the Paul Scherrer Institute journal March 2016
A low-background piston–cylinder-type hybrid high pressure cell for muon-spin rotation/relaxation experiments journal September 2017
Pressure dependence of the magnetic ground states in MnP journal March 2016
Multiple band crossings and Fermi surface topology: Role of double nonsymmorphic symmetries in MnP-type crystal structures journal September 2019

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