Common Energy Scale for Magnetism and Superconductivity in Underdoped Cuprates: A Muon Spin Resonance Investigation of (CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy
Amit Kanigel, Amit Keren, Yaakov Eckstein, Arkady Knizhnik, James S. Lord, Alex Amato
DOI 10.1103/PhysRevLett.88.137003 · Physical Review Letters
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Abstract
We characterize the spontaneous magnetic field, and determine the associated temperature Tg, in the superconducting state of (CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy using zero and longitudinal field muon spin resonance 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 33.1 | Pressure not reported | unknown |
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