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oai:figshare.com:article/33798685 2026-09-15T14:15:34Z portal_1197 item_type_3 month_year_09_2026

Data for Unusual phase boundary of the magnetic-field-tuned valence transition in CeOs4Sb12 Kathrin Gotze (24901165) Matthew J. Pearce (24901168) Paul Goddard (564595) M. Jaime (24878887) M. B. Maple (24940033) K. Sasmal (24940036) Tatsuya Yanagisawa (24875197) A. McCollam (21410399) T. Khouri (24940039) P -C. Ho (24940042) J. Singleton (2953443) Valence fluctuations Skutterudite Magnetic fields Migrated from ePrints The phase diagram of the filled skutterudite has been mapped in fields H of up to and temperatures T down to using resistivity, magnetostriction, and MHz conductivity. The valence transition separating the semimetallic low-H, low-T L phase from the metallic high-H, high-T H phase exhibits a very unusual, wedge-shaped phase boundary, with a non-monotonic gradient alternating between positive and negative. The expected "elliptical" behavior of the phase boundary of a valence transition with H2∝T2 originates in the H and T dependence of the free energy of the f~multiplet. Here, quantum oscillation measurements suggest that additional energy scales associated with a quantum critical point are responsible for the deviation of the phase boundary of from this text-book behavior at high H and low T. The distortion of the low-H, high-T portion of the phase boundary may be associated with the proximity of to a topological semimetal phase induced by uniaxial stress.<br><br>Figure2a.dat contains the data shown in Figure 2(a). The file is made up of 4 pairs of columns titled: X_B1 and Y_B1; X_B2 and Y_B2; X_B3 and Y_B3; X_B4 and Y_B4. These represent the Temperature (X) and normalized resisitivity (Y) data taken for samples B1, B2, B3 and B4, respectively. Figure2a_inset.dat contains the data shown in the inset of Figure 2(a). The file is made up of 6 pairs of columns titled: X_0T_warming and Y_0T_warming; X_0T_cooling and Y__0T_cooling; X_0p25T_warming and Y_0p25T_warming; X_0p25T_cooling and Y__0p25T_cooling; X_0p5T_warming and Y_0p5T_warming; X_0p5T_cooling and Y__0p5T_cooling. These represent the Temperature (X) and normalized resisitivity (Y) data taken at 0 T, 0.25 T and 0.5 T during warming and cooling, respectively. Figure2b.dat contains the data shown in Figure 2(b). The file is made up of 15 pairs of columns titled: X_0T and Y_0T; X_0p5T and Y_0p5T; X_1T and Y_1T; X_2T and Y_2T; X_2p5T and Y_2p5T; X_3T and Y_3T; X_3p5T and Y_3p5T; X_4T and Y_4T; X_5T and Y_5T; X_6T and Y_6T; X_8T and Y_8T; X_10T and Y_10T; X_12T and Y_12T; X_14T and Y_14T; X_15T and Y_15T. These represent the Temperature (X) and normalized resisitivity (Y) data taken at 0 T, 0.5 T, 1 T, 2 T, 2.5 T, 3 T, 3.5 T, 4 T, 5 T, 6 T, 8 T, 10 T, 12 T, 14 T and 15 T, respectively. Figure2c.dat contains the data shown in Figure 2(c). The file is made up of 5 pairs of columns titled: X_15T and Y_15T; X_19T and Y_19T; X_23T and Y_23T; X_27T and Y_27T; X_30T and Y_30T. These represent the Temperature (X) and normalized resisitivity (Y) data taken at 15 T, 19 T, 23 T, 27 T and 30 T, respectively. 2020-02-19T00:00:00Z Dataset Dataset 10.82444/warw.33798685.v1 https://figshare.com/articles/dataset/Data_for_Unusual_phase_boundary_of_the_magnetic-field-tuned_valence_transition_in_CeOs4Sb12/33798685 CC BY 4.0