Field-induced electronic phase separation in the high-temperature superconductor La1.94Sr0.06CuO4+y
S. Holm-Dahlin, J. Larsen, H. Jacobsen, A. T. Rømer, A.-E. Ţuţueanu, M. Ahmad, J.-C. Grivel, R. Scheuermann, M. v. Zimmermann, M. Boehm, P. Steffens, Ch. Niedermayer, K. S. Pedersen, N. B. Christensen, B. O. Wells, K. Lefmann, L. Udby
DOI 10.1103/PhysRevB.109.174517 · Physical Review B
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Abstract
We present a combined neutron diffraction and high-field muon spin rotation (μSR) study of the magnetically ordered and superconducting phases of the high-temperature superconductor La1.94Sr0.06CuO4+y [Tc=37.5(2) K] in a magnetic field applied perpendicular to the CuO2 planes. We observe a linear field-dependence of the intensity of the neutron diffraction peak that reflects the modulated antiferromagnetic stripe order. The magnetic volume fraction extracted from μSR data likewise increases linearly with applied magnetic field. The combination of these two observations allows us to unambiguously conclude that stripe-ordered regions grow in an applied field, whereas the stripe-ordered magnetic moment itself is field-independent. This contrasts with earlier suggestions that the field-induced neutron diffraction intensity in La-based cuprates is due to an increase in the ordered moment. We discuss a microscopic picture that is capable of reconciling these conflicting viewpoints.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.94Sr0.06CuO4+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37.5 | Pressure not reported | onset |
| La1.94Sr0.06CuO4+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37.5 | Pressure not reported | onset |
| La1.94Sr0.06CuO4+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37.5 | Pressure not reported | onset |
| La2-x-yNdySrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xBaxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-x-yEuySrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O6+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2CuO4+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La1.875Ba0.125CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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