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Data for Unusual phase boundary of the magnetic-field-tuned valence transition in CeOs4Sb12
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Gotze, Kathrin, Pearce, Matthew J., Goddard, Paul, Jaime, M., Maple, M. B., Sasmal, K., Yanagisawa, Tatsuya, McCollam, A., Khouri, T., Ho , P -C. and Singleton, J. (2020) Data for Unusual phase boundary of the magnetic-field-tuned valence transition in CeOs4Sb12. [Dataset]
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Official URL: http://wrap.warwick.ac.uk/131739
Abstract
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.
Item Type: | Dataset | ||||||||||||||||||||||||||||||||||||||||||
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Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||||||||||||||||||||
Type of Data: | Experimental data | ||||||||||||||||||||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Valence fluctuations, Skutterudite, Magnetic fields | ||||||||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||||||||||||||||||||||||||||||||||||||
Publisher: | University of Warwick, Department of Physics | ||||||||||||||||||||||||||||||||||||||||||
ISSN: | 1098-0121 | ||||||||||||||||||||||||||||||||||||||||||
Official Date: | 19 February 2020 | ||||||||||||||||||||||||||||||||||||||||||
Dates: |
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Status: | Not Peer Reviewed | ||||||||||||||||||||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||||||||||||||||||||
Media of Output (format): | .dat .txt | ||||||||||||||||||||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||||||||||||||||||||
Copyright Holders: | University of Warwick | ||||||||||||||||||||||||||||||||||||||||||
Description: | 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. |
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Date of first compliant deposit: | 9 January 2020 | ||||||||||||||||||||||||||||||||||||||||||
Date of first compliant Open Access: | 19 February 2020 | ||||||||||||||||||||||||||||||||||||||||||
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