title: Common energy scale for magnetism and superconductivity in underdoped cuprates: a muon spin resonance investigation of (Ca(x)La(1-x)) (Ba(1.75-x)La(0.25+x))Cu3O(y).
abstract: We characterize the spontaneous magnetic field, and determine the associated temperature T(g), in the superconducting state of (Ca(x)La(1-x)) (Ba(1.75-x)La(0.25+x)) Cu(3)O(y) using zero and longitudinal field muon spin resonance measurements for various values of x and y. Our major findings are (i) T(g) and T(c) are controlled by the same energy scale, (ii) the phase separation between hole poor and hole rich regions is a microscopic one, and (iii) spontaneous magnetic fields appear gradually with no moment size evolution.
authors.affiliation: Physics Department, Technion-Israel Institute of Technology, Haifa, 32000 Israel.
authors.forename: Amit
authors.initials: A
authors.lastname: Kanigel
authors.forename: Amit
authors.initials: A
authors.lastname: Keren
authors.forename: Yaakov
authors.initials: Y
authors.lastname: Eckstein
authors.forename: Arkady
authors.initials: A
authors.lastname: Knizhnik
authors.forename: James S
authors.initials: JS
authors.lastname: Lord
authors.forename: Alex
authors.initials: A
authors.lastname: Amato