2000 年 69 巻 2 号 p. 336-339
Several possible odd-parity states are listed group-theoretically and examined in light of recent experiments on Sr2RuO4. These include some of the f-wave pairing states, d(k)∝ z kxky(kx + iky) and z (kx2-ky2)(kx + iky) and other z (kx + iky)cos ckz (c is the c$-axis lattice constant) as the most plausible candidates. These are time-reversal symmetry-broken states and have line nodes running either vertically (the former two) or horizontally (the latter), consistent with experimental results. Characterizations of these states and other possibilities are given.
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