First ESR Detection of Higgs Amplitude Mode and Analysis with Extended Spin-Wave Theory in Dimer System KCuCl$$_3$$
1971 ◽
Vol 12
(10)
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pp. 2144-2150
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2012 ◽
Vol 81
(9)
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pp. 094712
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1992 ◽
Vol 4
(43)
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pp. 8339-8356
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1996 ◽
pp. 125-143