Gradual emergence of superconductivity in underdoped La2−xSrxCuO4
| Autor: | Ţuţueanu, Ana-elena, Kamminga, Machteld E., Tejsner, Tim B., Jacobsen, Henrik, Hansen, Henriette W., Lăcătuşu, Monica-elisabeta, Baas, Jacob, Eliasen, Kira L., Grivel, Jean-claude, Sassa, Yasmine, Christensen, Niels Bech, Steffens, Paul, Boehm, Martin, Piovano, Andrea, Lefmann, Kim, Rømer, Astrid T. |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Zdroj: | Ţuţueanu, A-E, Kamminga, M E, Tejsner, T B, Jacobsen, H, Hansen, H W, Lăcătuşu, M-E, Baas, J, Eliasen, K L, Grivel, J-C, Sassa, Y, Christensen, N B, Steffens, P, Boehm, M, Piovano, A, Lefmann, K & Rømer, A T 2023, ' Gradual emergence of superconductivity in underdoped La 2− x Sr x CuO 4 ', Physical Review B, vol. 107, no. 17, 174514 . https://doi.org/10.1103/PhysRevB.107.174514 Ţuţueanu, A, Kamminga, M E, Tejsner, T B, Jacobsen, H, Hansen, H W, Lăcătuşu, M, Baas, J, Eliasen, K L, Grivel, J, Sassa, Y, Christensen, N B, Steffens, P, Boehm, M, Piovano, A, Lefmann, K & Rømer, A T 2023, ' Gradual emergence of superconductivity in underdoped La 2-x Sr x CuO 4 ', Physical Review B, vol. 107, no. 17, 174514 . https://doi.org/10.1103/PhysRevB.107.174514 |
| Popis: | We present triple-axis neutron scattering studies of low-energy magnetic fluctuations in strongly underdoped La2−xSrxCuO4 with x = 0.05, 0.06 and 0.07, providing quantitative evidence for a direct competition between these fluctuations and superconductivity. At dopings x = 0.06 and x = 0.07, three-dimensional superconductivity is found, while only a very weak signature of twodimensional superconductivity residing in the CuO2 planes is detectable for x = 0.05. We find a surprising suppression of the low-energy fluctuations by an external magnetic field at all three dopings. This implies that the response of two-dimensional superconductivity to a magnetic field is similar to that of a bulk superconductor. Our results provide direct evidence of a very gradual onset of superconductivity in cuprates. |
| Databáze: | OpenAIRE |
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