This chapter is intended as a brief overview of some of the quantum spin liquid phases with unbroken SU(2) spin symmetry available in one dimension. The main characteristics of these phases are discussed by means of the bosonization approach. A special emphasis is laid on the interplay between frustration and quantum fluctuations in one dimension.

arXiv:cond-mat/0306520Jun 20, 20031 citation

Dynamics of a Quantum Spin Liquid

Johannes Knolle

Springer thesesJan 1, 201640 citations

Springer tracts in modern physics

One-Dimensional Quantum Spin Liquid

M. Ya. Amusia, Vasily R. Shaginyan

Published Jan 1, 2020• 1 citation

Publisher

DOI: 10.1007/978-3-030-50359-8_9

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\mathrm{C}{\mathrm{s}}_{4}\mathrm{CuS}{\mathrm{b}}_{2}\mathrm{C}{\mathrm{l}}_{12}

. Compared to previously reported

S=\frac{1}{2}

1D chains, this material possesses a wider temperature range over which the QSL state is stabilized. We identify spinon excitations extending at

T>0.8\phantom{\rule{0.16em}{0ex}}\mathrm{K}

, with a large

T

-linear contribution to the specific heat, $\ensuremath{\gamma}=31.5(2)\phantom{\rule{0.16em}{0ex}}\mathrm{mJ}\phantom{\rule{0.16em}{0ex}}\mathrm{mo}{\mathrm{l}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{\ensuremath{-}2}$, which contribute itinerantly to thermal transport up to temperatures as high as

T=35\phantom{\rule{0.16em}{0ex}}\mathrm{K}

. At

T=0.7\phantom{\rule{0.16em}{0ex}}\mathrm{K}

, we find a second-order phase transition that is unchanged by a ${\ensuremath{\mu}}_{0}H=5\phantom{\rule{0.16em}{0ex}}\mathrm{T}$ magnetic field.

\mathrm{C}{\mathrm{s}}_{4}\mathrm{CuS}{\mathrm{b}}_{2}\mathrm{C}{\mathrm{l}}_{12}

reveals new phenomenology deep in the 1D QSL regime, supporting a gapped QSL phase over a wide temperature range compared to many other experimental realizations.