Published 2012 | Version v1
Journal article Metadata-only

Pair-breaking in overdoped Ba(Fe1-xCox)2As2: Evidence for s± superconductivity

Creators

  • 1. Institut fuer Festkoerperphysik, KIT, Karlsruhe (Germany)

Description

Using specific-heat measurements, we study the effect of disorder induced by Co substitution on the thermodynamic properties of overdoped Ba(Fe1-xCox)2As2 (x>0.06) superconductors. We find that scattering of electrons by these non-magnetic impurities is rather strong (beyond Born limit) explaining the rapid suppression of Tc for x=0.12. The variation of the specific-heat discontinuity, the thermodynamic critical field, and the gapless contributions, with Co content can be accurately reproduced only if the superconducting ground state exhibits s± symmetry. Comparisons with other systems including K and P doped single crystals are given.

Additional details

Identifiers

URL
http://www.dpg-verhandlungen.de;

Publishing Information

Journal Title
Verhandlungen der Deutschen Physikalischen Gesellschaft
Journal Issue
Berlin 2012 issue
Series
Also available as printed version: Verhandlungen der Deutschen Physikalischen Gesellschaft v. 47(4)
Journal Page Range
[1 p.]
ISSN
0420-0195
CODEN
VDPEAZ

Conference

Title
76. annual conference of the DPG and DPG Spring meeting 2012 of the condensed matter section (SKM) with further DPG divisions environmental physics, microprobes, radiation and medical physics, as well as the DPG working groups energy, equal opportunities, industry and business, information, philosophy of physics, physics and disarmament, young DPG
Dates
25-30 Mar 2012
Place
Berlin (Germany)

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
45021918
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
BARIUM COMPOUNDS; COBALT ARSENIDES; COOPER PAIRS; CRITICAL FIELD; CRITICAL TEMPERATURE; ELECTRON COLLISIONS; ELECTRONIC SPECIFIC HEAT; ELECTRONIC STRUCTURE; GROUND STATES; IRON ARSENIDES; PHASE TRANSFORMATIONS; SCATTERING; SINGULARITY; SPIN ORIENTATION; SUPERCONDUCTIVITY; SUPERCONDUCTORS; SYMMETRY
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ARSENIC COMPOUNDS; ARSENIDES; COBALT COMPOUNDS; COLLISIONS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ENERGY LEVELS; IRON COMPOUNDS; MAGNETIC FIELDS; ORIENTATION; PHYSICAL PROPERTIES; PNICTIDES; SPECIFIC HEAT; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE

Optional Information

Notes
Session: TT 8.2 Mo 15:15; No further information available