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Common energy scale for magnetism and superconductivity in underdoped cuprates: a MuSR investigation of (CaLa)(BaLa)CuO

Amit Kanigel·Amit Keren·Yaakov Eckstein·Arkady Knizhnik·James S. Lord·Alex Amato
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Abstract

We characterize the spontaneous magnetic field, and determine the associated temperature Tg, 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 MuSR measurements for various values of x and y. Our major findings are: (I) Tg and Tc 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.

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Amit Kanigel, Amit Keren, Yaakov Eckstein, Arkady Knizhnik, James S. Lord, Alex Amato. 2002-03-03. Common energy scale for magnetism and superconductivity in underdoped cuprates: a MuSR investigation of (CaLa)(BaLa)CuO. https://doi.org/10.1103/physrevlett.88.137003

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