Large anisotropic uniaxial pressure dependencies of Tc in single crystalline Ba(Fe0.92Co0.08)2As2

Abstract

Using high-resolution dilatometry, we study the thermodynamic response of the lattice parameters to superconducting order in a self-flux grown Ba(Fe0.92Co0.08)2As2 single crystal. The uniaxial pressure dependencies of the critical temperature of Tc, calculated using our thermal expansion and specific heat data via the Ehrenfest relation, are found to be quite large and very anisotropic (dTc/dpa = 3.1(1) K/GPa and dTc/dpc = - 7.0(2) K/GPa). Our results show that there is a strong coupling of the c/a ratio to superconducting order, which demonstrates that Tc is far from the optimal value. A surprising similarity with the uniaxial pressure effects in several other layered superconductors is discussed.

11 pages, 4 Figures

References in corpus (16)

• Superconductivity at 22 K in Co-doped BaFe2As2 Crystals
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO1-y (Ln=La,Nd)
• Pressure induced superconductivity in CaFe${}_2$As${}_2$
• Effects of Co substitution on thermodynamic and transport properties and anisotropic $H_{c2}$ in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ single crystals
• Determination of the phase diagram of the electron doped superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Superconductivity up to 29 K in SrFe2As2 and BaFe2As2 at high pressures
• Anisotropic thermodynamic and transport properties of single crystalline (Ba${}_{1-x}$K${}_x$)Fe${}_2$As${}_2$ (x = 0 and 0.45)
• Superconductivity and Crystal Structures of (Ba1-xKx)Fe2As2 (x = 0 - 1)
• The challenge of unravelling magnetic properties in LaFeAsO
• Electron-Hole Symmetry and Magnetic Coupling in Antiferromagnetic LaOFeAs
• Bandwidth and Fermi surface of Iron-Oxypnictides: covalency and sensitivity to structural changes
• Suppression of Magnetic Order by Pressure in BaFe2As2
• Pressure-induced shift of T${}_c$ in K${}_x$Sr${}_{1-x}$Fe${}_2$As${}_2$ (x=0.2, 0.4, 0.7): Analogy to the high-T${}_c$ cuprate superconductors
• High pressure study on LaFeAsO with different Tc
• Abnormal T-linear susceptibility and Phase diagram of BaFe${}_{2-x}$Co${}_x$As${}_2$ single crystals

Cited by in corpus (36)

• Lack of coupling between superconductivity and orthorhombic distortion in stoichiometric single-crystalline FeSe
• Evidence of Strong Correlations and Coherence-Incoherence Crossover in the Iron Pnictide Superconductor KFe2As2
• Doping evolution of superconducting gaps and electronic densities of states in Ba(Fe1-xCox)2As2 iron pnictides
• Coexistence and competition of magnetism and superconductivity on the nanometer scale in underdoped BaFe1.89Co0.11As2
• Chemical Pressure and Physical Pressure in BaFe_2(As_{1-x}P_{x})_2
• Coherent excitations and electron phonon coupling in Ba/EuFe_2As_2 compounds investigated by femtosecond time- and angle-resolved photoemission spectroscopy
• Thermal expansion and Grüneisen parameters of Ba(Fe1-xCox)2As2 - a thermodynamic quest for quantum criticality
• Pressure versus concentration tuning of the superconductivity in Ba(Fe(1-x)Cox)2As2
• Muon spin rotation study of magnetism and superconductivity in Ba(Fe1-xCox)2As2 single crystals
• Thermodynamic phase diagram and phase competition in BaFe2(As1-xPx)2 studied by thermal expansion
• High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of KFe2As2 under high pressure
• Optical conductivity of iron-based superconductors
• Nonequilibrium Quasiparticle Relaxation Dynamics in Single Crystals of Hole and Electron doped BaFe${}_2$As${}_2$
• Thermal expansion of LaFeAsO: Evidence for high-temperature fluctuations
• Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)2As2
• Electronic structure of single-crystalline Sr(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ probed by x-ray absorption spectroscopy: Evidence for isovalent substitution of Fe${}^{2+}$ by Co${}^{2+}$
• Hydrostatic and uniaxial pressure dependence of superconducting transition temperature of KFe2As2 single crystals
• Uniaxial pressure effect on the magnetic ordered moment and transition temperatures in BaFe${}_{2-x}{T}_x$As${}_2$ ($T=$Co, Ni)
• Temperature - pressure phase diagram of the superconducting iron pnictide LiFeP
• Spin-density-wave-induced anomalies in the optical conductivity of AFe2As2, (A=Ca, Sr, Ba) single-crystalline iron pnictides
• Strange Inter-layer Properties of $Ba(F{e}_{1-x}C{o}_x)2A{s}_2$ Appearing in Ultrasonic Measurements
• Thermoelectric anisotropy in Ba(Fe1-xCox)2As2 iron-based superconductor
• Of Substitution and Doping: Spatial and Electronic Structure in Fe Pnictides
• Diverse fluctuations and anisotropic Gr{\" u}neisen parameter behavior in iron-based superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ and their correlation with superconductivity
• Thermodynamic Observation of a Vortex Melting Transition in the Fe-based Superconductor Ba0.5K0.5Fe2As2
• Anisotropic thermal expansion of AEFe2As2 (AE = Ba, Sr, Ca) single crystals
• Anisotropic thermal expansion of Fe1.06Te and FeTe0.5Se0.5 single crystals
• Preparation of hybrid Josephson junctions on Co-doped Ba-122 single crystals
• Violation of the Wiedemann-Franz law as an evidence of the pseudogap in the iron-based superconductor Ba(Fe1-xCox)2As2
• Electronic structure and ultrafast dynamics of FeAs-based superconductors by angle- and time-resolved photoemission spectroscopy
• Superconducting gap symmetry in BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$ superconductor
• Coexistence of Eu-antiferromagnetism and pressure-induced superconductivity in EuFe2As2 single crystal
• Electronic structure and quantum criticality in Ba(Fe${}_{1-x-y}$Co${}_x$Mn${}_y$)${}_2$As${}_2$, an ARPES study
• The interplay of electron doping and chemical pressure in Ba(Fe(1-y)Coy)2(As(1-x)Px)2
• Crossover of the pairing symmetry from $s$- to $d$-wave in iron pnictide superconductors
• Single crystal growth of BaFe${}_{2-x}$Co${}_x$As${}_2$ without fluxing agent