| Autor: |
Wilson, Stephen D., Shiliang Li, Jun Zhao, Gang Mu, Hai-Hu Wen, Lynn, Jeffrey W., Freeman, Paul G., Regnault, Louis-Pierre, Habicht, Klaus, Pengcheng Dai |
| Předmět: |
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| Zdroj: |
Proceedings of the National Academy of Sciences of the United States of America; 9/25/2007, Vol. 104 Issue 39, p15259-15263, 5p, 4 Graphs |
| Abstrakt: |
The quantum spin fluctuations of the S = ½ Cu ions are important in determining the physical properties of high-transition-temperature (high Tc) copper oxide superconductors. but their possible role in the electron pairing of superconductivity remains an open question. The principal feature of the spin fluctuations in optimally doped high-Tc superconductors is a well defined magnetic resonance whose energy (ER) tracks Tc (as the composition is varied) and whose intensity develops like an order parameter in the super-conducting state. We show that the suppression of superconductivity and its associated condensation energy by a magnetic field in the electron-doped high-Tc superconductor Pr0.88LaCe0.12CuO4-δ (Tc = 24 K), is accompanied by the complete suppression of the resonance and the concomitant emergence of static antiferromagnetic order. Our results demonstrate that the resonance is intimately related to the superconducting condensation energy, and thus suggest that it plays a role in the electron pairing and superconductivity. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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