TY - JOUR
T1 - Renormalized behavior and proximity of BaCo2As2 to a magnetic quantum critical point
AU - Sefat, A. S.
AU - Singh, D. J.
AU - Jin, R.
AU - McGuire, M. A.
AU - Sales, B. C.
AU - Mandrus, D.
PY - 2009/1/5
Y1 - 2009/1/5
N2 - We report synthesis and single-crystal measurements of magnetic, transport, and thermal properties of single crystalline BaCo2 As2 as well as first-principles calculations of the electronic structure and magnetic behavior. These results show that BaCo2 As2 is a highly renormalized paramagnet in proximity to a quantum critical point, presumably of ferromagnetic character and that BaFeNiAs2 behaves similarly. These results are discussed in relation to the properties of Ba (Fe,Co) 2 As2 and Ba (Fe,Ni) 2 As2, which are superconducting for low Co and Ni concentrations.
AB - We report synthesis and single-crystal measurements of magnetic, transport, and thermal properties of single crystalline BaCo2 As2 as well as first-principles calculations of the electronic structure and magnetic behavior. These results show that BaCo2 As2 is a highly renormalized paramagnet in proximity to a quantum critical point, presumably of ferromagnetic character and that BaFeNiAs2 behaves similarly. These results are discussed in relation to the properties of Ba (Fe,Co) 2 As2 and Ba (Fe,Ni) 2 As2, which are superconducting for low Co and Ni concentrations.
UR - http://www.scopus.com/inward/record.url?scp=60349106163&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.79.024512
DO - 10.1103/PhysRevB.79.024512
M3 - Article
AN - SCOPUS:60349106163
SN - 1098-0121
VL - 79
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 2
M1 - 024512
ER -