Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-09-16
Phys. Rev. B 83, 064405 (2011)
Physics
Condensed Matter
Strongly Correlated Electrons
11 pages (2 column), 5 figures, published version
Scientific paper
10.1103/PhysRevB.83.064405
It is generally difficult to experimentally distinguish magnetic multipolar orders in spin systems. Recently, it was proposed that the temperature dependence of the nuclear magnetic resonance relaxation rate 1/T_1 can involve an indirect, but clear signature of the field-induced spin nematic or multipolar Tomonaga-Luttinger (TL) liquid phase [Phys. Rev. B79, 060406(R) (2009)]. In this paper, we evaluate accurately the field and temperature dependence of 1/T_1 in spin-1/2 frustrated J1-J2 chains combining field-theoretical techniques with numerical data. Our results demonstrate that isotherms of 1/T_1 as a function of magnetic field also exhibit distinctive non-monotonic behavior in spin nematic TL liquid, in contrast with the standard TL liquid in the spin-1/2 Heisenberg chain. The relevance of our results to quasi one-dimensional edge-sharing cuprate magnets, such as LiCuVO4, is discussed.
Hikihara Toshiya
Momoi Tsutomu
Sato Masahiro
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