TY - JOUR
T1 - Evidence for a transition in the pairing symmetry of the electron-doped cuprates
La2-xCexCuO4-y and Pr2-xCexCuO4-y
AU - Skinta, John A.
AU - Kim, Mun-Seog
AU - Lemberger , Thomas R.
AU - Greibe, Tine
AU - Natio, M.
PY - 2002
Y1 - 2002
N2 - We present measurements of the magnetic penetration depth, lambda(-2)(T) , in Pr2-xCe xCuO4-y and La2-xCe xCuO4-y films at three Ce doping levels, x , near optimal. Optimal and overdoped films are qualitatively and quantitatively different from underdoped films. For example, lambda(-2)(0) decreases rapidly with underdoping but is roughly constant above optimal doping. Also, lambda(-2)(T) at low T is exponential at optimal and overdoping but is quadratic at underdoping. In light of other studies that suggest both d - and s -wave pairing symmetry in nominal optimally doped samples, our results are evidence for a transition from d - to s -wave pairing near optimal doping.
AB - We present measurements of the magnetic penetration depth, lambda(-2)(T) , in Pr2-xCe xCuO4-y and La2-xCe xCuO4-y films at three Ce doping levels, x , near optimal. Optimal and overdoped films are qualitatively and quantitatively different from underdoped films. For example, lambda(-2)(0) decreases rapidly with underdoping but is roughly constant above optimal doping. Also, lambda(-2)(T) at low T is exponential at optimal and overdoping but is quadratic at underdoping. In light of other studies that suggest both d - and s -wave pairing symmetry in nominal optimally doped samples, our results are evidence for a transition from d - to s -wave pairing near optimal doping.
U2 - 10.1103/PhysRevLett.88.207005
DO - 10.1103/PhysRevLett.88.207005
M3 - Journal article
C2 - 12005594
SN - 0031-9007
VL - 88
JO - Physical Review Letters
JF - Physical Review Letters
IS - 20
M1 - 207005
ER -