Dynamics of a Heisenberg spin chain in the quantum critical regime: NMR experiment versus effective field theory

Details Dynamics of a Heisenberg spin chain in the quantum critical regime: NMR experiment versus effective field theory Dynamics of a Heisenberg spin chain in the quantum critical regime: NMR experiment versus effective field theory

2010-07-21

arxiv.org/abs/1007.3608v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

A comprehensive comparison between the magnetic field- and temperature-dependent low frequency spin dynamics in the antiferromagnetic spin-1/2 Heisenberg chain (AFHC) system copper pyrazine dinitrate, probed via the 13C-nuclear magnetic resonance (NMR) relaxation rate 1/T1, and the field theoretical approach in the Luttinger liquid (LL) regime has been performed. We have found a very good agreement between the experiment and theory in the investigated temperature and field range. Our results demonstrate how strongly the quantum critical point affects the spin dynamics of Heisenberg spin chain compounds.

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