Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Effect of heavy-ion irradiation on London penetration depth in overdoped Ba(Fe 1-x Co x ) 2 As 2

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
Irradiation with 1.4 GeV 208 Pb ions was used to induce artificial disorder in single crystals of iron-arsenide superconductor Ba(Fe 1 - x Co x ) 2 As 2 and to study its effects on the temperature-dependent London penetration depth and transport properties. A study was undertaken on overdoped single crystals with x = 0.108 and x = 0.127 characterized by notable modulation of the superconducting gap. Irradiation corresponding to the matching fields of B Φ = 6 T and 6.5 T with doses 2.22 × 10 11 d /cm 2 and 2.4 × 10 11 d /cm 2 , respectively, suppresses the superconducting T c by approximately 0.3 to 1 K. The variation of the low-temperature penetration depth in both pristine and irradiated samples is well described by the power law Δ λ ( T ) = A T n . Irradiation increases the magnitude of the prefactor A and decreases the exponent n , similar to the effect of irradiation in optimally-doped samples. This finding supports universal s ± pairing in Ba(Fe 1 - x Co x ) 2 As 2 compounds for the entire Co doping range.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
Sponsoring Organization:
USDOE SC Office of Basic Energy Sciences (SC-22)
DOE Contract Number:
AC02-98CH10886
OSTI ID:
1385468
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 5 Vol. 88; ISSN 1098-0121; ISSN PRBMDO
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

References (58)

Evolution of symmetry and structure of the gap in iron-based superconductors with doping and interactions journal December 2011
Superconductivity gets an iron boost journal March 2010
Magnetic penetration depth in unconventional superconductors journal June 2006
Unconventional London Penetration Depth in Single-Crystal Ba ( Fe 0.93 Co 0.07 ) 2 As 2 Superconductors journal March 2009
Orbital-Fluctuation-Mediated Superconductivity in Iron Pnictides: Analysis of the Five-Orbital Hubbard-Holstein Model journal April 2010
Magneto-optical study of Ba ( Fe 1 − x M x ) 2 As 2 ( M = Co and Ni) single crystals irradiated with heavy ions journal March 2010
The Challenge of Unconventional Superconductivity journal April 2011
Using controlled disorder to distinguish s ± and s + + gap structure in Fe-based superconductors journal March 2013
FeAs-Based Superconductivity: A Case Study of the Effects of Transition Metal Doping on BaFe 2 As 2 journal August 2010
Unconventional Superconductivity with a Sign Reversal in the Order Parameter of LaFeAsO 1 − x F x journal July 2008
Superconductivity without phonons journal December 2007
London penetration depth in Ba ( Fe 1 − x T x ) 2 As 2 ( T = Co ,   Ni ) superconductors irradiated with heavy ions journal August 2010
Doping-dependent anisotropic superconducting gap in Na 1 − δ (Fe 1 − x Co x )As from London penetration depth journal July 2012
Gap symmetry and structure of Fe-based superconductors journal October 2011
Evidence for superconducting gap nodes in the zone-centered hole bands of KFe 2 As 2 from magnetic penetration-depth measurements journal July 2010
Quantum Criticality and Nodal Superconductivity in the FeAs-Based Superconductor KFe 2 As 2 journal February 2010
Pseudogap and its critical point in the heavily doped Ba ( Fe 1 − x Co x ) 2 As 2 from c -axis resistivity measurements journal October 2010
Effect of strong scattering on the low-temperature penetration depth of a d -wave superconductor journal August 1993
Possible Multiple Gap Superconductivity with Line Nodes in Heavily Hole-Doped Superconductor KFe 2 As 2 Studied by 75 As Nuclear Quadrupole Resonance and Specific Heat journal August 2009
High-temperature superconductivity in iron-based materials journal August 2010
Anisotropy of the iron pnictide superconductor Ba ( Fe 1 − x Co x ) 2 As 2 ( x = 0.074 ,   T c = 23   K ) journal March 2009
Superconductivity without Nesting in LiFeAs journal August 2010
Nodeless two-gap superconducting state in single crystals of the stoichiometric iron pnictide LiFeAs journal March 2011
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides journal October 2010
Interplane resistivity of isovalent doped BaFe 2 (As 1 − x P x ) 2 journal March 2013
A common thread: The pairing interaction for unconventional superconductors journal October 2012
Pnictogen height as a possible switch between high- T c nodeless and low- T c nodal pairings in the iron-based superconductors journal June 2009
Angular-dependent upper critical field of overdoped Ba(Fe 1 − x Ni x ) 2 As 2 journal March 2013
Exotic d -Wave Superconducting State of Strongly Hole-Doped K x Ba 1 − x Fe 2 As 2 journal September 2011
Effects of Co substitution on thermodynamic and transport properties and anisotropic H c 2 in Ba ( Fe 1 − x Co x ) 2 As 2 single crystals journal December 2008
A note on the Maximum Critical Field of High‐Field Superconductors journal September 1962
Meissner-London state in superconductors of rectangular cross section in a perpendicular magnetic field journal July 2000
Upper Limit for the Critical Field in Hard Superconductors journal September 1962
Jump in specific heat at the superconducting transition temperature in Ba ( Fe 1 − x Co x ) 2 As 2 and Ba ( Fe 1 − x Ni x ) 2 As 2 single crystals journal June 2009
Anisotropic upper critical field and possible Fulde-Ferrel-Larkin-Ovchinnikov state in the stoichiometric pnictide superconductor LiFeAs journal February 2011
Unconventional superconductivity in Ba0.6K0.4Fe2As2 from inelastic neutron scattering journal December 2008
Octet-Line Node Structure of Superconducting Order Parameter in KFe2As2 journal September 2012
Nodal superconductivity in isovalently substituted SrFe 2 (As 1 − x P x ) 2 pnictide superconductor at the optimal doping x = 0.35 journal April 2013
Is LaFeAsO 1 − x F x an Electron-Phonon Superconductor? journal July 2008
From d-wave to s-wave pairing in the iron-pnictide superconductor (Ba,K)Fe 2 As 2 journal July 2012
Pairing symmetry in cuprate superconductors journal October 2000
Effect of heavy-ion irradiation on superconductivity in Ba 0.6 K 0.4 Fe 2 As 2 journal May 2013
Magnetic penetration depth in single crystals of SrPd 2 Ge 2 superconductor journal March 2013
Orbital upper critical field and its anisotropy of clean one- and two-band superconductors journal October 2012
Nodes in the gap structure of the iron arsenide superconductor Ba ( Fe 1 − x Co x ) 2 As 2 from c -axis heat transport measurements journal August 2010
Sudden reversal in the pressure dependence of Tc in the iron-based superconductor KFe2As2 journal May 2013
Doping Dependence of Heat Transport in the Iron-Arsenide Superconductor Ba ( Fe 1 − x Co x ) 2 As 2 : From Isotropic to a Strongly k -Dependent Gap Structure journal February 2010
Iron-Based Layered Superconductor La[O 1- x F x ]FeAs ( x = 0.05−0.12) with T c = 26 K journal March 2008
Temperature and Purity Dependence of the Superconducting Critical Field, H c 2 . III. Electron Spin and Spin-Orbit Effects journal July 1966
London penetration depth in iron-based superconductors journal September 2011
Isotropic three-dimensional gap in the iron arsenide superconductor LiFeAs from directional heat transport measurements journal August 2011
Upper critical field of isoelectron substituted SrFe 2 (As 1 − x P x ) 2 journal March 2013
Field-dependent transport critical current in single crystals of Ba(Fe 1 − x TM x ) 2 As 2 (TM = Co, Ni) superconductors journal April 2010
Superconductivity in iron compounds journal December 2011
Universal Heat Conduction in the Iron Arsenide Superconductor KFe 2 As 2 : Evidence of a d -Wave State journal August 2012
Momentum Dependence of the Superconducting Gap in NdFeAsO 0.9 F 0.1 Single Crystals Measured by Angle Resolved Photoemission Spectroscopy journal October 2008
A BCS-like gap in the superconductor SmFeAsO0.85F0.15 journal June 2008
London penetration depth in single crystals of Ba ( Fe 1 − x Co x ) 2 As 2 spanning underdoped to overdoped compositions journal March 2009