TY  - JOUR
N2  - We report measurements of the in-plane electrical resistivity rho and thermal conductivity kappa of the intercalated graphite superconductor C6Yb down to temperatures as low as T-c/100. When a field is applied along the c axis, the residual electronic linear term kappa(0)/T evolves in an exponential manner for H-c1 < H < H-c2/2. This activated behavior is compelling evidence for an s-wave order parameter, and is a strong argument against the possible existence of multigap superconductivity.
IS  - 6
ID  - discovery116271
UR  - http://dx.doi.org/10.1103/PhysRevLett.98.067003
TI  - Bulk evidence for single-gap s-wave superconductivity in the intercalated graphite superconductor C6Yb
Y1  - 2007/02/09/
SN  - 0031-9007
AV  - public
KW  - THERMAL-CONDUCTIVITY
KW  -  FIELD
KW  -  STATE
KW  -  MODEL
PB  - AMERICAN PHYSICAL SOC
A1  - Sutherland, M
A1  - Doiron-Leyraud, N
A1  - Taillefer, L
A1  - Weller, T
A1  - Ellerby, M
A1  - Saxena, SS
JF  - PHYS REV LETT
N1  - © 2007 The American Physical Society
VL  - 98
ER  -