Field-induced electronic phase separation in the high-temperature superconductor La$_{1.94}$Sr$_{0.06}$CuO$_{4+y}$
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2021
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| _version_ | 1866910421898756096 |
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| author | Holm-Dahlin, S. Larsen, J. Jacobsen, H. Rømer, A. T. Ţuţueanu, A. -E. Ahmad, M. Grivel, J. -C. Scheuermann, R. Zimmermann, M. v. Boehm, M. Steffens, P. Niedermayer, Ch. Pedersen, K. S. Christensen, N. B. Wells, B. O. Lefmann, K. Udby, L. |
| author_facet | Holm-Dahlin, S. Larsen, J. Jacobsen, H. Rømer, A. T. Ţuţueanu, A. -E. Ahmad, M. Grivel, J. -C. Scheuermann, R. Zimmermann, M. v. Boehm, M. Steffens, P. Niedermayer, Ch. Pedersen, K. S. Christensen, N. B. Wells, B. O. Lefmann, K. Udby, L. |
| contents | We present a combined neutron diffraction and high field muon spin rotation ($μ$SR) study of the magnetically ordered and superconducting phases of the high-temperature superconductor La$_{1.94}$Sr$_{0.06}$CuO$_{4+y}$ ($T_{\rm c} = 37.5(2)$~K) in a magnetic field applied perpendicular to the CuO$_2$ 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 $μ$SR 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2101_10672 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Field-induced electronic phase separation in the high-temperature superconductor La$_{1.94}$Sr$_{0.06}$CuO$_{4+y}$ Holm-Dahlin, S. Larsen, J. Jacobsen, H. Rømer, A. T. Ţuţueanu, A. -E. Ahmad, M. Grivel, J. -C. Scheuermann, R. Zimmermann, M. v. Boehm, M. Steffens, P. Niedermayer, Ch. Pedersen, K. S. Christensen, N. B. Wells, B. O. Lefmann, K. Udby, L. Superconductivity We present a combined neutron diffraction and high field muon spin rotation ($μ$SR) study of the magnetically ordered and superconducting phases of the high-temperature superconductor La$_{1.94}$Sr$_{0.06}$CuO$_{4+y}$ ($T_{\rm c} = 37.5(2)$~K) in a magnetic field applied perpendicular to the CuO$_2$ 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 $μ$SR 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. |
| title | Field-induced electronic phase separation in the high-temperature superconductor La$_{1.94}$Sr$_{0.06}$CuO$_{4+y}$ |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2101.10672 |