Structural and magnetic phase transitions in Ca${}_{0.73}$La${}_{0.27}$FeAs${}_2$ with electron overdoped FeAs layers

Abstract

We report a study of the Ca${}_{0.73}$La${}_{0.27}$FeAs${}_2$ single crystals. We unravel a monoclinic to triclinic phase transition at 58 K, and a paramagnetic to stripe antiferromagnetic (AFM) phase transition at 54 K, below which spins order 45${}^{\circ }$ away from the stripe direction. Furthermore, we demonstrate this material is substantially structurally untwinned at ambient pressure with the formation of spin rotation walls (S-walls). Finally, in addition to the central-hole and corner-electron Fermi pockets usually appearing in Fe pnictide superconductors, angle-resolved photoemission (ARPES) measurements resolve a Fermiology where an extra electron pocket of mainly As chain character exists at the Brillouin zone edge.

arXiv comment5 pages, 3 figures

References in corpus (24)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• Magnetism and its microscopic origin in iron-based high-temperature superconductors
• Symmetry breaking orbital anisotropy on detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
• Critical change in the Fermi surface of iron arsenic superconductors at the onset of superconductivity
• Uniaxial strain detwinning of CaFe2As2 and BaFe2As2: optical and transport study
• Nematic spin correlations in the tetragonal state of uniaxial strained BaFe2-xNixAs2
• Structural collapse and superconductivity in rare earth-doped CaFe2As2
• Superconductivity in Ca1-xLaxFeAs2: A Novel 112-Type Iron Pnictide with Arsenic Zigzag Bonds
• Anisotropic itinerant magnetism and spin fluctuations in BaFe2As2: A neutron scattering study
• Anisotropic Impurity-States, Quasiparticle Scattering and Nematic Transport in Underdoped Ca(Fe1-xCox)2As2
• Doping evolution of superconducting gaps and electronic densities of states in Ba(Fe1-xCox)2As2 iron pnictides
• Structure and Anisotropic Properties of BaFe2-xNixAs2 (x = 0, 1, 2) Single Crystals
• Effect of uniaxial strain on the structural and magnetic phase transitions in BaFe${}_2$As${}_2$
• Anisotropy of the in-plane resistivity of underdoped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ superconductors induced by impurity scattering in the antiferromagnetic orthorhombic phase
• The effect of As-Chain layers in CaFeAs${}_2$
• Coincident structural and magnetic order in BaFe${}_2$(As${}_{1-x}$)P${}_x$)${}_2$ revealed by high-resolution neutron diffraction
• Significant contribution of As 4p orbitals to the low-lying electronic structure of 112-type iron-based superconductor Ca0.9La0.1FeAs2
• Anisotropic Superconductivity of Ca1-xLaxFeAs2 (x ~ 0.18) Single Crystal
• A new family of iron pnictides: BaFeAs2 and BaFeSb2
• Crystal and magnetic structure of the superconductor CeNi${}_{0.8}$Bi${}_2$
• Systematics of the temperature-dependent inter-plane resistivity in Ba(Fe${}_{1-x}$T${}_x$)${}_2$As${}_2$ with T= Rh, Ni, and Pd
• Correlation-induced self-doping in intercalated iron-pnictide superconductor Ba2Ti2Fe2As4O

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• Crystal growth and phase diagram of 112-type iron pnictide superconductor Ca1-yLayFe1-xNixAs2
• Superconductivity and Dirac Fermions in 112-phase Pnictides
• Fluctuation conductivity and possible pseudogap state in FeAs-based superconductor EuFeAsO(0.85)F(0.15)
• Comparative study of superconducting and normal-state anisotropy in Fe${}_{1+y}$Te${}_{0.6}$Se${}_{0.4}$ superconductors with controlled amounts of interstitial excess Fe
• Phase stability and large in-plane resistivity in the 112-type iron-based superconductor Ca${}_{1-x}$La${}_x$FeAs${}_2$
• Co-doping effects on magnetism and superconductivity in the 112-type EuFeAs2 system
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• Coexistence of ferromagnetism, antiferromagnetism, and superconductivity in magnetically anisotropic (Eu,La)FeAs2
• Correlation between non-Fermi-liquid behavior and superconductivity in (Ca, La)(Fe,Co)As2 iron arsenides: A high-pressure study
• Nonlinear and time-resolved optical study of the 112-type iron-based superconductor parent Ca${}_{1-x}$La${}_x$FeAs${}_2$ across its structural phase transition
• Optical study of the antiferromagnetic ordered state in electron-overdoped Ca0.77Nd0.23FeAs2
• Fluctuating Cooper pairs in FeSe at temperatures exceeding double Tc
• Persistent antiferromagnetic order in heavily overdoped Ca${}_{1-x}$La${}_x$FeAs${}_2$
• Pressure-Induced Superconductivity from Doping-Induced Antiferromagnetic Phase of 112-type Ca${}_{1-x}$La${}_x$FeAs${}_2$
• Spin fluctuations in the 112-type iron-based superconductor Ca${}_{0.82}$La${}_{0.18}$Fe${}_{0.96}$Ni${}_{0.04}$As${}_2$
• Discovery of a bi-critical point between antiferromagnetic and superconducting phases in pressurized single crystal Ca0.73La0.27FeAs2