[1] T Takabatake, K Suekuni, T Nakayama, E Kaneshita. Rev. Mod. Phys., 86, 669(2014).

[2] J He, T M Tritt. Science, 357(2017).

[3] B Poudel, Q Hao, Y Ma, Y Lan, A Minnich, B Yu, X Yan, D Wang, A Muto, D Vashaee, X Chen, J Liu, M S Dresselhaus, G Chen, Z Ren. Science, 320, 634(2008).

[4] H Zhao, M Pokharel, S Chen, B Liao, K Lukas, C Opeil, G Chen, Z Ren. Nanotechnology, 23(2012).

[5] B S Du, J K Jian, H T Liu, J Liu, L Qiu. Chin. Phys. B, 27(2018).

[6] H Zhao, J Sui, Z Tang, Y Lan, Q Jie, D Kraemer, K McEnaney, A Guloy, G Chen, Z Ren. Nano Energy, 7, 97(2014).

[7] D Li, H Zhao, S Li, B Wei, J Shuai, C Shi, X Xi, P Sun, S Meng, L Gu, Z Ren, X Chen. Adv. Funct. Mater., 25, 6478(2015).

[8] Z Liu, Y Wang, J Mao, H Geng, J Shuai, Y Wang, R He, W Cai, J Sui, Z Ren. Adv. Energy Mater., 6(2016).

[9] Z Liu, J Mao, J Sui, Z Ren. Energy Environ. Sci., 11, 23(2018).

[10] J F Wang, X N Fu, X D Zhang, J T Wang, X D Li, Z Y Jiang. Chin. Phys. B, 25(2016).

[11] X Li, P Liu, E Zhao, Z Zhang, T Guidi, M D Le, M Avdeev, K Ikeda, T Otomo, M Kofu, K Nakajima, J Chen, L He, Y Ren, X L Wang, B T Wang, Z Ren, H Zhao, F Wang. Nat. Commun., 11, 942(2020).

[12] L D Zhao, S H Lo, Y Zhang, H Sun, G Tan, C Uher, C Wolverton, V P Dravid, M G Kanatzidis. Nature, 508, 373(2014).

[13] B Li, H Wang, Y Kawakita, Q Zhang, M Feygenson, H L Yu, D Wu, K Ohara, T Kikuchi, K Shibata, T Yamada, X K Ning, Y Chen, J Q He, D Vaknin, R Q Wu, K Nakajima, M G Kanatzidis. Nat. Mater., 17, 226(2018).

[14] J L Niedziela, D Bansal, A F May, J Ding, T Lanigan-Atkins, G Ehlers, D L Abernathy, A Said, O Delaire. Nat. Phys., 15, 73(2019).

[15] J Rodríguez-Carvajal. Physica B, 192, 55(1993).

[16] M Avdeev, J R Hester. J. Appl. Crystallogr., 51, 1597(2018).

[17] A Scheer, H Kruppke, R Heib. Diffraction Analysis of the Microstructure of Materials, 68(2004).

[18] M J Kirkham, A M dos Santos, C J Rawn, E Lara-Curzio, J W Sharp, A J Thompson. Phys. Rev. B, 85(2012).

[19] M Cardona, R Merlin. Light Scattering in Solid IX, 108(2006).