High Pressure Studies on Fe-Pnictide Superconductors

Abstract

A review of high-pressure studies on Fe-pnictide superconductors is given. The pressure effects on the magnetic and superconducting transitions are discussed for different classes of doped and undoped FeAs-compounds, ROFeAs (R = rare earth), AeFe2As2 (Ae = Ca, Sr, Ba), and AFeAs (A = Li, Na). Pressure tends to decrease the magnetic transition temperature in the undoped or only slightly doped compounds. The superconducting Tc increases with pressure for underdoped FeAs-pnictides, remains approximately constant for optimal doping, and decreases linearly in the overdoped range. The undoped LaOFeAs and AeFe2As2 become superconducting under pressure although nonhydrostatic pressure conditions seem to play a role in CaFe2As2. The superconductivity in the (undoped) AFeAs is explained as a chemical pressure effect due to the volume contraction caused by the small ionic size of the A-elements. The binary FeSe shows the largest pressure coefficient of Tc in the Se-deficient superconducting phase.

submitted for publication in Physica C special issue on Fe-pnictides

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• The superconductor KxSr(1-x)Fe2As2: Normal state and superconducting properties
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Cited by in corpus (45)

• Superconductivity in Iron Compounds
• Pressure dependence of the magic twist angle in graphene superlattices
• Pressure induced superconductivity in BaFe2As2 single crystal
• New ternary ThCr2Si2-type iron-selenide superconducting materials: synthesis, properties and simulations
• Superconductivity in the iron selenide KxFe2Se2 (0 <= x <= 1)
• High pressure study of BaFe2As2 - role of hydrostaticity and uniaxial stress
• Superconductivity in NdFe1-xCoxAsO (0.05 < x < 0.20) and rare-earth magnetic ordering in NdCoAsO
• Symmetry preserving lattice collapse in tetragonal SrFe_(2-x)Ru_xAs_2 (x = 0, 0.2) -- a combined experimental and theoretical study
• Pressure-induced phase transitions and high-pressure tetragonal phase of Fe1.08Te
• Hydrostatic-pressure tuning of magnetic, nonmagnetic and superconducting states in annealed Ca(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Effect of 3d-doping on the electronic structure of BaFe2As2
• Effect of external pressure on the magnetic properties of LnFeAsO (Ln = La, Ce, Pr, Sm)
• Pressure effect on superconductivity of $A_x$Fe${}_2$Se${}_2$ ($A$ = K and Cs)
• Spin-phonon coupling and pressure effect in the superconductor LiFeAs : Lattice dynamics from first-principles calculations
• Search for pressure induced superconductivity in CeFeAsO and CeFePO iron pnictides
• Hydrostatic and uniaxial pressure dependence of superconducting transition temperature of KFe2As2 single crystals
• Simultaneous optimization of spin fluctuations and superconductivity under pressure in an iron-based superconductor
• Crystal growth and the electronic phase diagram of the 4$d$ doped Na${}_{1-\delta }$Fe${}_{1-x}$Rh${}_x$As in comparison with 3$d$ doped Na${}_{1-\delta }$Fe${}_{1-x}$Co${}_x$As
• A view from inside iron-based superconductors
• Quantum oscillations of the superconductor LaRu${}_2$P${}_2$ : comparable mass enhancement $\lambda \approx 1$ in Ru and Fe phosphides
• First-principles study of superconducting Rare-earth doped CaFe2As2
• Superconductivity in titanium-based pnictide oxide compounds
• High pressure study of the normal and superconducting states of the layered pnictide oxide Ba${}_{1-x}$Na${}_x$Ti${}_2$Sb${}_2$O with x = 0, 0.10, and 0.15
• High pressure transport studies of the LiFeAs analogues CuFeTe2 and Fe2As
• Effects of pressure-induced phase transitions on superconductivity in the single crystal Fe1.02Se
• Pressure-induced ferromagnetism due to an anisotropic electronic topological transition in Fe1.08Te
• Pressure-induced multiple phase transformations of the BaBi${}_3$ superconductor
• Pressure effects on strained FeSe0.5Te0.5 thin films
• Electrodynamics of BaFe2As2 from infrared measurements under pressure
• Structural and Physical Properties of CaFe4As3 Single Crystals
• Effects of Pressure on the Electronic and Structural Properties of LaOFeAs
• Pressure-Driven Quantum Criticality in An Iron-Selenide Superconductor
• Interplay of superconductivity and magnetism in FeSe${}_{1-x}$Te${}_x$ compounds. Pressure effects
• Iron-Arsenide monolayer as an anode materials for Lithium-ion batteries: A first-principles study
• Coexistence of Eu-antiferromagnetism and pressure-induced superconductivity in EuFe2As2 single crystal
• Optical Study of BaFe${}_2$As${}_2$ under pressure: Coexistence of spin-density-wave gap and superconductivity
• Correlation effects in Ni 3d states of LaNiPO
• Anomalous He-Gas High-Pressure Studies on Superconducting LaO1-xFxFeAs
• High Pressure Effects on the Superconductivity in Rare-Earth Doped CaFe2As2
• Non-linear lattice response of SmFeAsO_{1-x}F_{x} superconductor to hydrostatic pressure
• Superconductivity In K- And Na- Doped Bafe2as2: What Can We Learn From Heat Capacity And Pressure Dependence of Tc
• Synthesis, Crystal Growth and Epitaxial Layer Deposition of FeSe0.88 Superconductor and Other Poison Materials by Use of High Gas Pressure Trap System
• Weakening of the spin density wave gap at low temperatures in SrFe${}_2$As${}_2$ single crystals
• Effect of external pressure on the magnetic properties of $R$CoAsO ($R$ = La, Pr, Sm): a $\mu$SR study
• Reinforcement of interfacial superconductivity in a Bi2Te3/Fe1+yTe heterostructure under hydrostatic pressure