Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-10-08
Phys. Rev. B 79, 060406(R) (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
4+epsilon pages, 2 figures, published version
Scientific paper
10.1103/PhysRevB.79.060406
Recently, it has been shown that spin nematic (quadrupolar) or higher multipolar correlation functions exhibit a quasi long-range order in the wide region of the field-induced Tomonaga-Luttinger-liquid (TLL) phase in spin-1/2 zigzag chains. In this paper, we point out that the temperature dependence of the NMR relaxation rate 1/T_1 in these multipolar TLLs is qualitatively different from that in more conventional TLLs of one-dimensional quantum magnets (e.g., the spin-1/2 Heisenberg chain); 1/T_1 decreases with lowering temperature in multipolar TLL. We also discuss low-energy features in spin dynamical structure factors which are characteristic of the multipolar TLL phases.
Furusaki Akira
Momoi Tsutomu
Sato Masahiro
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