Fig. 3: Analysis of the low-temperature heat capacity anomaly. | npj Quantum Materials

Fig. 3: Analysis of the low-temperature heat capacity anomaly.

From: Interaction of magnetic fields with spinons in a fractionalized state

Fig. 3

a C/T vs. 1/T3 for 50 mK ≤ T ≤ 1 K for both the HFSM and QSL. Note the slope D (~10−3 JK/mole) for both phases is essentially the same, and three orders of magnitude larger than that due to nuclear contributions. b C as a function of H2 at representative T for the QSL. c, d Upturns in C for the HFSM and QSL grow in magnitude with field but share a common onset near Ts  = 150 mK. e In contrast, Pr-doped Ba4Nb1-xRu3+xO12 exhibits a conventional Schottky anomaly with stronger field sensitivity, highlighting the distinct mechanism in the undoped system.

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