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. 2024 Mar 14;15:2295. doi: 10.1038/s41467-024-46527-x

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© The Author(s) 2024

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Fig. 1 — a The generic phase diagram (η is the tuning parameter; QCP is the quantum critical point). The critical value of the tuning parameter is labeled η_c. b Schematic view of magnetic excitation spectra for the field- and pressure-induced quantum phase transitions (q is the momentum; ℏω is the excitation energy; z is the dynamic critical exponent, see Eq. (1)).