most citedDirect Observation of the Quantum Energy Gap in S = 1/2 Tetragonal Cuprate Antiferromagnets

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Direct Observation of the Quantum Energy Gap in S = 1/2 Tetragonal Cuprate Antiferromagnets

K. Katsumata, M. Hagiwara, Z. Honda +9

Using an electron spin resonance spectrometer covering a wide range of frequency and magnetic field, we have measured the low energy excitations of the S=1/2 tetragonal antiferroma…