Superconductivity in KCa$_2$Fe$_4$As$_4$F$_2$ with Separate Double Fe$_2$As$_2$ Layers

Zhi-Cheng Wang; Chao-Yang He; Si-Qi Wu; Zhang-Tu Tang; Yi Liu; Abduweli Ablimit; Chun-Mu Feng; Guang-Han Cao

doi:10.1021/jacs.6b04538

paper

Superconductivity in KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ with Separate Double Fe $_{2}$ As $_{2}$ Layers

arXiv:1607.01611 · doi:10.1021/jacs.6b04538

Abstract

We report synthesis, crystal structure and physical properties of a quinary iron-arsenide fluoride KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ . The new compound crystallizes in a body-centered tetragonal lattice (with space group $I 4/ mmm$ , $a$ = 3.8684(2) Å, c = 31.007(1) Å, and $Z$ = 2), which contains double Fe $_{2}$ As $_{2}$ conducting layers separated by insulating Ca $_{2}$ F $_{2}$ layers. Our measurements of electrical resistivity, dc magnetic susceptibility and heat capacity demonstrate bulk superconductivity at 33 K in KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ .

arXiv comment11 pages, 7 figures, 2 tables

References in corpus (15)

Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
Superconductivity at 43 K in Samarium-arsenide Oxides $S m F e A s O_{1 - x} F_{x}$
A Common Thread: the pairing interaction for the unconventional superconductors
Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
Superconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs
Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO1-y (Ln=La,Nd)
Anion height dependence of Tc for the Fe-based superconductor
Transition of stoichiometricSr2VO3FeAs to a superconducting state at 37.2 K
Low temperature specific heat of the hole-doped Ba_{0.6}K_{0.4}Fe_2As_2 single crystals and electron-doped SmFeAsO_{0.9}F_{0.1} samples
Fully Gapped Superconducting State Based on a High Normal State Quasiparticle Density of States in Ba $_{0.6}$ K $_{0.4}$ Fe $_{2}$ As $_{2}$ Single Crystals
Superconductivity and Ferromagnetism in Hole-Doped RbEuFe $_{4}$ As $_{4}$
Anomalous Eu Valence State and Superconductivity in Undoped Eu3Bi2S4F4
Emergent Kondo scaling in iron-based superconductors AFe2As2 (A = K, Rb, Cs)
Self doping effect and successive magnetic transitions in superconducting Sr $_{2}$ VFeAsO $_{3}$
Crystal Chemistry and Structural Design of Iron-Based Superconductors

Cited by in corpus (52)

Structural transition, electric transport, and electronic structures in the compressed trilayer nickelate La4Ni3O10
Crystal Structure and Superconductivity at about 30 K in $A$ Ca $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ ( $A$ = Rb, Cs)
Neutron spin resonance in a quasi-two-dimensional iron-based superconductor
Giant anisotropy in superconducting single crystals of CsCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Single-crystal growth and extremely high H_c2 of 12442-type Fe-based superconductor KCa_2Fe_4As_4F_2
Nodal multigap superconductivity in KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Synthesis, crystal structure and superconductivity in Rb $L n_{2}$ Fe $_{4}$ As $_{4}$ O $_{2}$ ( $L n$ = Sm, Tb, Dy and Ho)
Two-gap superconductivity with line nodes in CsCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Superconductivity at 33 - 37 K in $A L n_{2}$ Fe $_{4}$ As $_{4}$ O $_{2}$ ( $A$ = K and Cs; $L n$ = Lanthanides)
Spectroscopic Evidence of Bilayer Splitting and Interlayer Pairing in an Iron Based Superconductor
A brief review on muSR studies of unconventional Fe and Cr-based superconductors
Friedel Oscillations of Vortex Bound States Under Extreme Quantum Limit in KCa2Fe4As4F2
Spin Resonance in the New-Structure-Type Iron-Based Superconductor CaKFe4As4
Charge Density Wave order and electron-phonon coupling in ternary superconductor Bi $_{2}$ Rh $_{3}$ Se $_{2}$
Ultrafast Optical Spectroscopy Evidence of Pseudogap and Electron-Phonon Coupling in an Iron-Based Superconductor KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Superconductivity at 35 K by self doping in RbGd $_{2}$ Fe $_{4}$ As $_{4}$ O $_{2}$
Multigap superconductivity in ThAsFeN investigated using muSR measurements
Multigap nodeless superconductivity in CsCa2Fe4As4F2 probed by heat transport
Strong Pauli paramagnetic effect in the upper critical field of KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
NMR and NQR studies on transition-metal arsenide superconductors LaRu2As2, KCa2Fe4As4F2, and A2Cr3As3
Band-selective clean- and dirty-limit superconductivity with nodeless gaps in the bilayer iron-based superconductor CsCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Single particle tunneling spectroscopy and superconducting gaps in layered iron based superconductor KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Phase coherence of pairs of Cooper pairs as quasi-long-range order of half-vortex pairs in a two-dimensional bilayer system
Low temperature specific heat of 12442-type KCa_2Fe_4As_4F_2 single crystals
Anisotropic physical properties and large critical current density in KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ single crystal
Multigap superconductivity in RbCa2Fe4As4F2 investigated using muSR measurements
Nodal multigap superconductivity in the anisotropic iron-based compound RbCa2Fe4As4F2
Elastoresistance measurements on CaKFe $_{4}$ As $_{4}$ and KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ with the Fe site of $C_{2 v}$ symmetry
BaTh $_{2}$ Fe $_{4}$ As $_{4}$ (N $_{0.7}$ O $_{0.3}$ ) $_{2}$ : An Iron-Based Superconductor Stabilized by Inter-Block-Layer Charge Transfer
Magnetism and superconductivity in Eu(Fe $_{1 - x}$ Ni $_{x}$ )As $_{2}$ ( $x$ = 0, 0.04)
Observation of Two-dimensional Superconductivity in an Ultrathin Iron-Arsenic Superconductor
Anomalous second magnetization peak in 12442-type RbCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ superconductors
Observation of a neutron spin resonance in the bilayered superconductor CsCa2Fe4As4F2
Superconductivity and magnetic and transport properties of single-crystalline CaK(Fe $_{1 - x}$ Cr $_{x}$ ) $_{4}$ As $_{4}$
Pseudogap and Strong Pairing Induced by Incipient and Shallow Bands in the Quasi-Two-Dimensional KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Spectroscopic studies of the superconducting gap in the 12442 family of iron-based compounds
Evidence of electron interaction with an unidentified bosonic mode in superconductor CsCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Mössbauer spectroscopy study of magnetic fluctuations in superconducting RbGd $_{2}$ Fe $_{4}$ As $_{4}$ O $_{2}$
Second magnetization peak, anomalous field penetration, and Josephson vortices in KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ bilayer pnictide superconductor
Anomalous metallic oxygen band in the potential superconductor KCa $_{2}$ Fe $_{4}$ As $_{4}$ O $_{2}$
Superconductivity-induced transverse plasma mode and phonon anomaly in the $c$ -axis response of the bilayer compound RbCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Unusually weak irradiation effects in anisotropic iron-based superconductor RbCa2Fe4As4F2
Quasi-two-dimensional heterostructures (K $M_{1 - x}$ Te)(LaTe $_{3}$ ) ( $M$ = Mn, Zn) with charge density waves
Interplay of electron-phonon coupling, pseudogap, and superconductivity in CsCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ studied using ultrafast optical spectroscopy
Study of the rare earth effects on the magnetic fluctuations in RbLn $_{2}$ Fe $_{4}$ As $_{4}$ O $_{2}$ (Ln = Tb, Dy and Ho) by Mössbauer spectroscopy
Multiband superconductivity and a deep gap minimum from the specific heat in KCa $_{2}$ (Fe $_{1 - x}$ Ni $_{x}$ ) $_{4}$ As $_{4}$ F $_{2}$ ( $x$ = 0, 0.05, 0.13)
Synthesis, structure and properties of layered phosphide nitrides $A k$ Th $_{2}$ Mn $_{4}$ P $_{4}$ N $_{2}$ ( $A k$ = Rb, Cs)
Superconductivity of Co-Doped CaKFe4As4 Investigated via Point-Contact Spectroscopy and London Penetration Depth Measurements
Decoupled interband pairing in a bilayer iron-based superconductor evidenced by ultrahigh-resolution ARPES
Structural design and multiple magnetic orderings of the intergrowth compound Eu $_{2}$ CuMn $_{2}$ P $_{3}$
A Convenient Sealing Method Using Boron Nitride Capping for Reactive Reactions
Superconductivity above 30 K due to the introduction of oxygen in CaFeAsF

Superconductivity in KCa2​Fe4​As4​F2​ with Separate Double Fe2​As2​ Layers

Abstract

References in corpus (15)

Cited by in corpus (52)

Superconductivity in KCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ with Separate Double Fe $_{2}$ As $_{2}$ Layers