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24 April 2024 |
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Evidence for magnetic quasiparticle phase separation in a quasi-one-dimensional quantum magnet | | L. Shen
; E. Campillo
; O. Zaharko
; P. Steffens
; M. Boehm
; Z. He
; D. Prabhakaran
; A. T. Boothroyd
; E. Blackburn
; | | Date: |
7 Sep 2019 | | Abstract: | Magnetic systems composed of weakly coupled spin-1/2 chains are fertile
ground for hosting the fractional magnetic excitations that are intrinsic to
interacting fermions in one-dimension (1D). However, the exotic physics arising
from the quantum many-body interactions beyond 1D are poorly understood in
materials of this class. Spinons and psinons are two mutually exclusive
low-energy magnetic quasiparticles; the excitation seen depends on the ground
state of the spin chain. Here, we present inelastic neutron scattering and
neutron diffraction evidence for their coexistence in SrCo$_{2}$V$_{2}$O$_{8}$
at milli-Kelvin temperatures in part of the N’eel phase (2.4 T $leq$
$mu_mathrm{{0}}$H $<$ 3.9 T) and possibly also the field-induced spin density
wave phase up to the highest field probed ($mu_mathrm{{0}}$H $geq$ 3.9 T,
$mu_mathrm{{0}}$H$_mathbf{mathrm{{max}}}$ = 5.5 T). These results unveil a
novel spatial phase inhomogeneity for the weakly coupled spin chains in this
compound. This quantum dynamical phase separation is a new phenomenon in
quasi-1D quantum magnets, highlighting the non-trivial consequences of
inter-chain coupling. | | Source: | arXiv, 1909.3146 | | Services: | Forum | Review | PDF | Favorites | |
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