New magnetic phase diagram of (Sr,Ca)2RuO4
| Autor: | Yasutomo J. Uemura, Satoru Nakatsuji, Adam A. Aczel, Travis Williams, Graeme Luke, Andrei T. Savici, Y. Maeno, J. A. Rodriguez, Tatsuo Goko, Gregory MacDougall, Jeremy P. Carlo, Christopher R. Wiebe, I. M. Gat-Malureanu, T. Taniguchi, Yoshiyuki Yoshida, P. L. Russo |
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| Rok vydání: | 2012 |
| Předmět: |
Superconductivity
Condensed matter physics Magnetism Chemistry Mechanical Engineering Relaxation (NMR) General Chemistry Muon spin spectroscopy Condensed Matter Physics Magnetic susceptibility Mechanics of Materials Condensed Matter::Superconductivity Antiferromagnetism Spin density wave Condensed Matter::Strongly Correlated Electrons General Materials Science Unconventional superconductor |
| Zdroj: | Nature Materials. 11:323-328 |
| ISSN: | 1476-4660 1476-1122 |
| DOI: | 10.1038/nmat3236 |
| Popis: | High-T(c) cuprates, iron pnictides, organic BEDT and TMTSF, alkali-doped C(60), and heavy-fermion systems have superconducting states adjacent to competing states exhibiting static antiferromagnetic or spin density wave order. This feature has promoted pictures for their superconducting pairing mediated by spin fluctuations. Sr(2)RuO(4) is another unconventional superconductor which almost certainly has a p-wave pairing. The absence of known signatures of static magnetism in the Sr-rich side of the (Ca, Sr) substitution space, however, has led to a prevailing view that the superconducting state in Sr(2)RuO(4) emerges from a surrounding Fermi-liquid metallic state. Using muon spin relaxation and magnetic susceptibility measurements, we demonstrate here that (Sr,Ca)(2)RuO(4) has a ground state with static magnetic order over nearly the entire range of (Ca, Sr) substitution, with spin-glass behaviour in Sr(1.5)Ca(0.5)RuO(4) and Ca(1.5)Sr(0.5)RuO(4). The resulting new magnetic phase diagram establishes the proximity of superconductivity in Sr(2)RuO(4) to competing static magnetic order. |
| Databáze: | OpenAIRE |
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