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GENERAL INFORMATION
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1. Title of Dataset: Data for "Heat conduction in magnetic insulators via hybridization of acoustic phonons and spin-flip excitations"


2. Authors: Minhyea Lee, Jie Xing, Michael A. Hermele, Athena S. Sefat, Eun Sang Choi, Christopher A. Pocs, Ian A. Leahy


3. Contact information: Minhyea.Lee@colorado.edu


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SHARING/ACCESS INFORMATION
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1. Licenses/restrictions placed on the data: CC BY 4.0 (Attribution 4.0 International)


2. Links to publications that cite or use the data: https://doi.org/10.48550/arXiv.2401.01407



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DATA & FILE OVERVIEW
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1. File & Directory List:


	A. Fig1: 
		1. fig1c_zeemansplitting.csv
		
		A1. fig1b:	
			1. fig1b_MvsH_1.5K.csv
			2. fig1b_MvsH_3K.csv
			3. fig1b_MvsH_6K.csv
			4. fig1b_MvsH_12K.csv
			5. fig1b_MvsH_20K.csv
        
	B. Fig2:
		B1. Fig2a_kvT:
			1. k0vT.csv
			2. k14vT.csv
		B2. Fig2b_kvH:
			1. kvH1p5K.csv
			2. kvH3k.csv
			3. kvh4k.csv
			4. kvh5k.csv
			5. kvh6k.csv
			6. kvh9k.csv
			7. kvh10k.csv
			8. kvh12k.csv
			9. kvh14k.csv
			10. kvh17k.csv
			11. kvh20k.csv
			12. kvh30k.csv
			13. kvh50k.csv
			14. kvh70k.csv
		B3. Fig2c_frac_kvH_offset:
			1. frac_kvH1p5K.csv
			2. frac_kvH3K.csv
			3. frac_kvh4k.csv
			4. frac_kvh5k.csv
			5. frac_kvh6k.csv
			6. frac_kvh9k.csv
			7. frac_kvh10k.csv
			8. frac_kvh12k.csv
			9. frac_kvh14k.csv
			10. frac_kvh17k.csv
			11. frac_kvh20k.csv
			12. frac_kvh30k.csv
			13. frac_kvh50k.csv
			14. frac_kvh70k.csv


	C. Fig3:
		1. CsYbSe2_dkvH_data.mat
		2. eta.mat
		3. fig3abcd.m
		4. figure3_e.m
		5. figure3_fg.m


	D. Fig4
		1. CsYbSe2_dkvH_data.mat
		2. figure4.m

2. Relationship between files:       

	A. Fig1:
		1. fig1c_zeemansplitting.csv: The CEF energy spectrum as a function of field. The 1st column corresponds to the field and the rest of the columns corresponds to 8 different energy levels from the lowest (left) to the highest (the most right column).

		A1. fig1b 
			The magnetization vs field data shown in Fig 1(b) of the article in csv format. Each file name indicates the temperature in K (kelvin). In each csv files, the 1st (left) column corresponds to field and the 2nd column to the magnetization. 

	B. Fig2:
		B1. Fig2a_kvT:
			Contains two csv files measuring thermal conductivity (kappa) data measured at zero field (0T) and 14 T curve as shown in Fig. 2(a). Inset uses the same data but only in the log scales of both axes.

		B2. Fig2b_kvH
			Contains 14 csv files for field dependence of kappa data at 14 different temperatures shown in Fig. 2(b). Each file name includes the temperature in K (kelvin). In each csv file, the 1st (left) column corresponds to field and the 2nd column to thermal conductivity. 
		
		B3. Fig2c_frac_kvH
			Contains 14 csv files for field dependence of fractional kappa data (defined in the manuscript) at 14 different temperatures. With increasing temperature, the linear increasing offset is added for the visual clarity as shown in Fig. 2(c).  Each file name includes the temperature in K (kelvin). In each csv file, the 1st (left) column corresponds to field and the 2nd column to thermal conductivity. 

	C. Fig3:
		Contains three .m (MATLAB code) files and two .mat (MATLAB data) files.
		1. fig3abcd.m, fig3_e.m and fig3_fg.m
			MATLAB code files that will calculate and generate Figure 3(a-d), Figure 3(e) and Figure 3(f-g). 
		2. CsYbSe2_dkvH_data.mat is used in Figure 3(f). This is the same data in Fig2c_frac_kvH, sans offset. 
		3. eta.mat is used to make the inset of Figure 3(g).

		As long as all five files are in the same folder, the MATLAB codes will run without error. 

	D. Fig4:
		Contains one .m (MATLAB code) file and one .mat (MATLAB data) file.
		1. figure4.m will create all six panels in Figure 4, using the data from CsYbSe2_dkvH_data.mat. As long both files are in the same folder, the MATLAB code will run. 


3. Software-specific information: (If specialized software(s) are necessary to view or interpret your data please provide for each (if applicable): software name, version, system requirements, and developer.)

	Files were created using MATLAB 2023b update 9 (23.2.0.2668659)