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dc.contributor.authorWu, Jianda
Yang, Wang
Wu, Congjun
Si, Qimiao
dc.date.accessioned 2018-09-27T17:33:25Z
dc.date.available 2018-09-27T17:33:25Z
dc.date.issued 2018
dc.identifier.citation Wu, Jianda, Yang, Wang, Wu, Congjun, et al.. "Quantum critical dynamics for a prototype class of insulating antiferromagnets." Physical Review B, 97, no. 22 (2018) American Physical Society: https://doi.org/10.1103/PhysRevB.97.224405.
dc.identifier.urihttps://hdl.handle.net/1911/102724
dc.description.abstract Quantum criticality is a fundamental organizing principle for studying strongly correlated systems. Nevertheless, understanding quantum critical dynamics at nonzero temperatures is a major challenge of condensed-matter physics due to the intricate interplay between quantum and thermal fluctuations. The recent experiments with the quantum spin dimer material TlCuCl3 provide an unprecedented opportunity to test the theories of quantum criticality. We investigate the nonzero-temperature quantum critical spin dynamics by employing an effective O(N) field theory. The on-shell mass and the damping rate of quantum critical spin excitations as functions of temperature are calculated based on the renormalized coupling strength and are in excellent agreement with experiment observations. Their TlnT dependence is predicted to be dominant at very low temperatures, which will be tested in future experiments. Our work provides confidence that quantum criticality as a theoretical framework, which is being considered in so many different contexts of condensed-matter physics and beyond, is indeed grounded in materials and experiments accurately. It is also expected to motivate further experimental investigations on the applicability of the field theory to related quantum critical systems.
dc.language.iso eng
dc.publisher American Physical Society
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Quantum critical dynamics for a prototype class of insulating antiferromagnets
dc.type Journal article
dc.citation.journalTitle Physical Review B
dc.citation.volumeNumber 97
dc.citation.issueNumber 22
dc.identifier.digital PhysRevB.97.224405
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.97.224405
dc.type.publication publisher version
dc.citation.articleNumber 224405


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