TY - GEN AU - Doiron-Leyraud,Nicolas AU - Sutherland,Mike AU - Li,S Y AU - Taillefer,Louis AU - Liang,Ruixing AU - Bonn,D A AU - Hardy,W N TI - Onset of a Boson mode at the superconducting critical point of underdoped YBa2Cu3Oy SN - 0031-9007 PY - 2007///0215 N1 - Publication Type: Journal Article UR - https://doi.org/10.1103/PhysRevLett.97.207001 ER -