Fig. 2: Field-induced evolution of the magnetic excitation spectrum in BPCB.
From: Fingerprints of supersymmetric spin and charge dynamics observed by inelastic neutron scattering
a–d Measured neutron scattering intensities in sector q⊥ = π at a temperature of 50 mK and applied magnetic fields of 6.0, 8.0, 10.4 and 12.6 T, where the ladder magnetizations are respectively mz = 0, 0.27, 0.50 and 0.71. Spectra in the faded region were generated by symmetry. e–h Corresponding spectral functions obtained from MPS calculations performed for the magnetized spin ladder at zero temperature (l-MPS). i-l, Zero-temperature spectral functions of the t0 sector calculated by MPS using the equivalent model of one hole in a modified t-J chain (c-MPS).
