First ESR Detection of Higgs Amplitude Mode and Analysis with Extended Spin-Wave Theory in Dimer System KCuCl$$_3$$

DOI DOI PDF Web Site 被引用文献3件 参考文献73件 オープンアクセス

書誌事項

公開日
2020-11-25
資源種別
journal article
権利情報
  • https://www.springer.com/tdm
  • https://www.springer.com/tdm
DOI
  • 10.1007/s00723-020-01302-1
  • 10.48550/arxiv.2105.00750
公開者
Springer Science and Business Media LLC

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説明

KCuCl$_3$ is known to show a quantum phase transition from the disordered to antiferromagnetically ordered phases by applying pressure. There is a longitudinal excitation mode (Higgs amplitude mode) in the vicinity of the quantum critical point in the ordered phase. To detect the Higgs amplitude mode, high-pressure ESR measurements are performed in KCuCl$_3$. The experimental data are analyzed by the extended spin-wave theory on the basis of the vector spin chirality. We report the first ESR detection of the Higgs amplitude mode and the important role of the electric dipole described by the vector spin chirality.

24 pages, 12 figures

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