Figure 1
From: Unveiling the Physics of the Mutual Interactions in Paramagnets
External magnetic field-induced quantum phase transitions. Schematic temperature T versus external magnetic field B phase diagrams. (a) Magnetic field-induced (cyan bullet) quantum critical point (QCP). The dotted lines depict the crossover temperatures. Figure after ref. 22. (b) Hypothetical zero-field quantum critical point (yellow bullet). The yellow gradient shadow represents the role played by the mutual interactions between neighboring magnetic moments, which are responsible for the emergence of an effective local magnetic field Bloc. We consider that Bloc makes an angle θ \(\simeq \) 90° with B, so that the resultant magnetic field (inset) is given by \({B}_{r}\simeq \sqrt{{B}^{2}+{B}_{loc}^{2}}\) (cyan arrow). The dotted line represents the transition from quantum paramagnet to a magnetic ordered phase. Figure created with use of Adobe Illustrator (version CC 2017)62. Details in the main text.
