skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Coupling of structure to magnetic and superconducting orders in quasi-one-dimensional K2Cr3As3

Journal Article · · Physical Review B

Here, quasi-one-dimensional A2Cr3As3 (with A = K, Cs, Rb) is an intriguing new family of superconductors which exhibit many similar features to the cuprate and iron-based unconventional superconductor families. Yet, in contrast to these systems, no charge or magnetic ordering has been observed which could provide the electronic correlations presumed necessary for an unconventional superconducting pairing mechanism—an absence which defies predictions of first-principles models. We report the results of neutron scattering experiments on polycrystalline K2Cr3As3 (Tc ~ 7) which probed the low-temperature dynamics near Tc. Neutron diffraction data evidence a subtle response of the nuclear lattice to the onset of superconductivity while inelastic scattering reveals a highly dispersive column of intensity at the commensurate wave vector q = (001/2) which loses intensity beneath Tc-indicative of short-range magnetic fluctuations. Using linear spin-wave theory, we model the observed scattering and suggest a possible structure to the short-range magnetic order. These observations suggest that K2Cr3As3 is in close proximity to a magnetic instability and that the incipient magnetic order both couples strongly to the lattice and competes with superconductivity, in direct analogy with the iron-based superconductors.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1784218
Alternate ID(s):
OSTI ID: 1409468
Journal Information:
Physical Review B, Vol. 96, Issue 18; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

References (49)

Competing superconducting and magnetic order parameters and field-induced magnetism in electron-doped Ba ( Fe 1 x Co x ) 2 As 2 journal January 2015
Instability of three-band Tomonaga-Luttinger liquid: Renormalization group analysis and possible application to K 2 Cr 3 As 3 journal November 2016
Structure du séléniure de molybdène et de thallium Tl2Mo6Se6: clusters monodimensionnels (Mo6/2)1∞ journal July 1980
Thermal expansion characteristics related to spin fluctuations and the pressure effect on the N el temperature of  -MnOs alloys journal June 2003
Double-Q spin-density wave in iron arsenide superconductors journal January 2016
Temperature and angular dependence of the upper critical field in K 2 Cr 3 As 3 journal January 2017
Manifesto for a higher Tc journal April 2011
Scaling between Magnetic and Lattice Fluctuations in Iron Pnictide Superconductors journal September 2013
Recent advances in magnetic structure determination by neutron powder diffraction journal October 1993
Tunable electronic anisotropy in single-crystal A 2 Cr 3 As 3 ( A = K ,   Rb ) quasi-one-dimensional superconductors journal July 2015
Unconventional superconductivity in quasi-one-dimensional Rb 2 Cr 3 As 3 journal January 2015
Structural, magnetic, and superconducting properties of Ba 1 x Na x Fe 2 As 2 journal September 2013
Detailed magnetic and structural analysis mapping a robust magnetic C 4 dome in Sr 1 x Na x Fe 2 As 2 journal April 2016
R factors in Rietveld analysis: How good is good enough? journal March 2006
Electronic structure of quasi-one-dimensional superconductor K2Cr3As3 from first-principles calculations journal November 2015
NMR Investigation of the Quasi-One-Dimensional Superconductor K 2 Cr 3 As 3 journal April 2015
Reduced dimensionality and magnetic frustration in KCr 3 As 3 journal December 2015
Local Orthorhombicity in the Magnetic C 4 Phase of the Hole-Doped Iron-Arsenide Superconductor Sr 1 x Na x Fe 2 As 2 journal October 2017
Lack of coupling between superconductivity and orthorhombic distortion in stoichiometric single-crystalline FeSe journal May 2013
Multiband One-Dimensional Electronic Structure and Spectroscopic Signature of Tomonaga-Luttinger Liquid Behavior in K 2 Cr 3 As 3 journal March 2017
Formation of Molecular-Orbital Bands in a Twisted Hubbard Tube: Implications for Unconventional Superconductivity in K 2 Cr 3 As 3 journal November 2015
Cluster spin-glass ground state in quasi-one-dimensional KCr 3 As 3 journal May 2015
Linear spin wave theory for single-Q incommensurate magnetic structures journal March 2015
Anomalous Suppression of the Orthorhombic Lattice Distortion in Superconducting Ba ( Fe 1 x Co x ) 2 As 2 Single Crystals journal February 2010
ISODISPLACE : a web-based tool for exploring structural distortions journal July 2006
Superconductivity in Quasi-One-Dimensional K 2 Cr 3 As 3 with Significant Electron Correlations journal February 2015
Spin fluctuation, thermal expansion anomaly, and pressure effects on the Néel temperature of β -MnM ( M = Ru , Os, and Ir) alloys journal August 2005
Strong-coupling electron-phonon superconductivity in noncentrosymmetric quasi-one-dimensional K 2 Cr 3 As 3 journal November 2015
Phonon Density of States of the Quasi-One-Dimensional Superconductor Tl 2 Mo 6 Se 6 journal November 1989
Superconductivity in the PbO-type structure  -FeSe journal September 2008
Correlation between superconductivity and bond angle of CrAs chain in non-centrosymmetric compounds A2Cr3As3 (A = K, Rb) journal November 2016
Superconductivity in quasi-one-dimensional Cs2Cr3As3 with large interchain distance journal January 2015
Antiferromagnetic spin fluctuations in LiFeAs observed by neutron scattering journal June 2011
Observation of the magnetic C 4 phase in Ca 1 x Na x Fe 2 As 2 and its universality in the hole-doped 122 superconductors journal February 2017
Observation of a Raman-active phonon with Fano line shape in the quasi-one-dimensional superconductor K 2 Cr 3 As 3 journal August 2015
Strong ( π , 0 ) spin fluctuations in β FeSe observed by neutron spectroscopy journal May 2015
Links between the Crystal and Electronic Structure in the New Family of Unconventional Superconductors A 2 Cr 3 As 3 (A = K, Rb, Cs) journal July 2015
Cesium vacancy ordering in phase-separated C s x F e 2 y S e 2 journal September 2015
Superconducting ground state of quasi-one-dimensional K 2 Cr 3 As 3 investigated using μ SR measurements journal October 2015
Ferromagnetic Spin Fluctuation and Unconventional Superconductivity in Rb 2 Cr 3 As 3 Revealed by As 75 NMR and NQR journal September 2015
Evidence for nodal superconductivity in quasi-one-dimensional K 2 Cr 3 As 3 journal June 2015
Anisotropy reversal of the upper critical field at low temperatures and spin-locked superconductivity in K 2 Cr 3 As 3 journal June 2015
Coincident structural and magnetic order in BaFe 2 ( As 1 x P x ) 2 revealed by high-resolution neutron diffraction journal September 2014
Superconductivity and Crystal Structures of (Ba 1− x K x )Fe 2 As 2 ( x =0-1) journal September 2008
A correction for powder diffraction peak asymmetry due to axial divergence journal December 1994
Magnetism in Quasi-One-Dimensional A 2 Cr 3 As 3 (A=K,Rb) Superconductors journal May 2015
Revisitation of superconductivity in K 2 Cr 3 As 3 based on the six-band model journal February 2016
Cs 133 and As 75 NMR investigation of the normal metallic state of quasi-one-dimensional Cs 2 Cr 3 As 3 journal May 2016
Specific heat and thermal expansion characteristics related to spin fluctuations in antiferromagnetic β-MnOs alloys journal April 2001

Cited By (4)

Tuning from frustrated magnetism to superconductivity in quasi-one-dimensional KCr 3 As 3 through hydrogen doping journal December 2019
Superconductivity with peculiar upper critical fields in quasi-one-dimensional Cr-based pnictides journal October 2018
Optimizing the tight-binding parametrization of the quasi-one-dimensional superconductor K 2 Cr 3 As 3 journal October 2018
Optimizing the tight-binding parametrization of the quasi-one-dimensional superconductor K2Cr3As3 text January 2018