Behavior of vortices near twin boundaries in underdoped $Ba(F{e}_{1-x}C{o}_x{)}_{2}A{s}_2$

Abstract

We use scanning SQUID microscopy to investigate the behavior of vortices in the presence of twin boundaries in the pnictide superconductor Ba(Fe1-xCox)2As2. We show that the vortices avoid pinning on twin boundaries. Individual vortices move in a preferential way when manipulated with the SQUID: they tend to not cross a twin boundary, but rather to move parallel to it. This behavior can be explained by the observation of enhanced superfluid density on twin boundaries in Ba(Fe1-xCox)2As2. The observed repulsion from twin boundaries may be a mechanism for enhanced critical currents observed in twinned samples in pnictides and other superconductors.

References in corpus (5)

• To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report
• 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${}_2$
• Controlled Manipulation of Individual Vortices in a Superconductor
• A Terraced Scanning Superconducting Quantum Interference Device Susceptometer with Sub-Micron Pickup Loops

Cited by in corpus (38)

• Direct observation of vortices in an electron fluid
• Topological solitons in three-band superconductors with broken time reversal symmetry
• Suppression of Superconductivity by Twin Boundaries in FeSe
• Probing dynamics and pinning of single vortices in superconductors at nanometer scales
• Chiral CP^2 skyrmions in three-band superconductors
• Length scales, collective modes, and type-1.5 regimes in three-band superconductors
• Optical Manipulation of Single Flux Quanta
• Doping-dependent critical current properties in K, Co, and P-doped BaFe2As2 single crystals
• Mechanical control of individual superconducting vortices
• Perspective: Challenges and Transformative Opportunities in Superconductor Vortex Physics
• Observation of superconducting vortices carrying a temperature-dependent fraction of the flux quantum
• Strong pinning and vortex energy distributions in single crystalline Ba(Fe1-xCox)2As2
• Disorder, critical currents, and vortex pinning energies in isovalently substituted BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Vortex images on Ba{1-x}KxFe2As2 observed directly by the magnetic force microscopy
• Imaging anisotropic vortex dynamics in FeSe
• Spin density wave induced disordering of the vortex lattice in superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• Chip-Integrated Vortex Manipulation
• Optical vortex manipulation for topological quantum computation
• Direct visualization of phase separation between superconducting and nematic domains in Co-doped CaFe2As2 close to a first order phase transition
• Single Vortex Pinning and Penetration Depth in Superconducting NdFeAsO${}_{1-x}$F${}_x$
• Vortex Structure and Anisotropic Superconducting Gaps in Ba[Fe(Ni)]${}_2$As${}_2$
• Vortex chains due to nonpairwise interactions and field-induced phase transitions between states with different broken symmetry in superconductors with competing order parameters
• Nematicity in the superconducting mixed state of strain detwinned underdoped $\text{Ba}({\text{Fe}}_{1-x}{\text{Co}}_x{)}_2{\text{As}}_2$
• Diamagnetic Vortex Barrier Stripes in Underdoped $BaF{e}_2(A{s}_{1-x}{P}_x{)}_2$
• Direct observation of quantum anomalous vortex in Fe(Se,Te)
• Meissner response of superconductors with inhomogeneous penetration depths
• Braiding Majorana Zero Mode in An Electrically Controllable Way
• Dependence of the absolute value of the penetration depth in $(\mathbf{B}{\mathbf{a}}_{1-\mathbf{x}}{\mathbf{K}}_{\mathbf{x}})\mathbf{F}{\mathbf{e}}_2\mathbf{A}{\mathbf{s}}_2$ on doping
• Large-scale modulation in the superconducting properties of thin films due to domains in the $SrTi{O}_3$ substrate
• Non-Gaussian tail in the force distribution: A hallmark of correlated disorder in the host media of elastic objects
• Vortex dynamics induced by scanning SQUID susceptometry
• Delocalization of vortex magnetic field near a planar defect
• Dynamical regimes of vortex flow in type-II superconductors with parallel twin boundaries
• Magnetic domain walls induced by twin boundaries in low doped Fe-pnictides
• A Ginzburg-Landau approach to the vortex-domain wall interaction in superconductors with nematic order
• Order-disorder phase transition and elastic-to-plastic vortex creep crossover in a triclinic iron pnictide superconductor (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5
• Flux exchange in inhomogeneous type-II superconductors
• Penetration of the magnetic field into the twinning plane in the type I and II superconductors