| JAIN, A., M. KRAUTLOHER, J. PORRAS, G.H. RYU, D.P. CHEN, D.L. ABERNATHY, J.T. PARK, A. IVANOV, Jiří CHALOUPKA, G. KHALIULLIN, B. KEIMER and B.J. KIM. Higgs mode and its decay in a two-dimensional antiferromagnet. Nature Physics. London: Nature Publishing Group, 2017, vol. 13, No 7, p. 633-637, 6 pp. ISSN 1745-2473. Available from: https://dx.doi.org/10.1038/NPHYS4077. |
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@article{1385984,
author = {Jain, A. and Krautloher, M. and Porras, J. and Ryu, G.H. and Chen, D.P. and Abernathy, D.L. and Park, J.T. and Ivanov, A. and Chaloupka, Jiří and Khaliullin, G. and Keimer, B. and Kim, B.J.},
article_location = {London},
article_number = {7},
doi = {http://dx.doi.org/10.1038/NPHYS4077},
keywords = {quantum magnetism; spin systems; spin-orbit coupling; condensate; spin excitations},
language = {eng},
issn = {1745-2473},
journal = {Nature Physics},
title = {Higgs mode and its decay in a two-dimensional antiferromagnet},
url = {http://www.nature.com/nphys/journal/v13/n7/full/nphys4077.html},
volume = {13},
year = {2017}
}
TY - JOUR
ID - 1385984
AU - Jain, A. - Krautloher, M. - Porras, J. - Ryu, G.H. - Chen, D.P. - Abernathy, D.L. - Park, J.T. - Ivanov, A. - Chaloupka, Jiří - Khaliullin, G. - Keimer, B. - Kim, B.J.
PY - 2017
TI - Higgs mode and its decay in a two-dimensional antiferromagnet
JF - Nature Physics
VL - 13
IS - 7
SP - 633-637
EP - 633-637
PB - Nature Publishing Group
SN - 17452473
KW - quantum magnetism
KW - spin systems
KW - spin-orbit coupling
KW - condensate
KW - spin excitations
UR - http://www.nature.com/nphys/journal/v13/n7/full/nphys4077.html
L2 - http://www.nature.com/nphys/journal/v13/n7/full/nphys4077.html
N2 - Condensed-matter analogues of the Higgs boson in particle physics allow insights into its behaviour in different symmetries and dimensionalities(1). Evidence for the Higgs mode has been reported in a number of different settings, including ultracold atomic gases(2), disordered superconductors(3), and dimerized quantum magnets(4). However, decay processes of the Higgsmode(which are eminently important in particlephysics) have not yet been studied in condensed matter due to the lack of a suitable material system coupled to a direct experimental probe. A quantitative understanding of these processes is particularly important for low-dimensional systems, where the Higgs mode decays rapidly and has remained elusive to most experimental probes. Here, we discover and study the Higgs mode in a two-dimensional antiferromagnet using spin-polarized inelastic neutron scattering. Our spin-wave spectra of Ca2RuO4 directly reveal a well-defined, dispersive Higgs mode, which quickly decays into transverse Goldstone modes at the antiferromagnetic ordering wavevector. Through a complete mapping of the transverse modes in the reciprocal space, we uniquely specify the minimal model Hamiltonian and describe the decay process. We thus establish a novel condensed-matter platform for research on the dynamics of the Higgs mode.
ER -
JAIN, A., M. KRAUTLOHER, J. PORRAS, G.H. RYU, D.P. CHEN, D.L. ABERNATHY, J.T. PARK, A. IVANOV, Jiří CHALOUPKA, G. KHALIULLIN, B. KEIMER and B.J. KIM. Higgs mode and its decay in a two-dimensional antiferromagnet. \textit{Nature Physics}. London: Nature Publishing Group, 2017, vol.~13, No~7, p.~633-637, 6 pp. ISSN~1745-2473. Available from: https://dx.doi.org/10.1038/NPHYS4077.
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