Effect of Ca Substitution on the Electronic Properties of Sr3Rh4Sn13
C. W. Tseng (曾致維)1*, C. N. Kuo (郭家農)1, C. S. Lue (呂欽山)1, L. M. Wang (王立民)2, Y. K. Kuo (郭永綱)3
1Physics, National Cheng Kung University, Tainan, Taiwan
2Physics, National Taiwan University, Taipei, Taiwan
3Physics, National Dong Hwa University, Hualien, Taiwan
* presenting author:Chih-Wei Tseng, email:pepeakf@gmail.com
In this work, we investigate the electronic properties of a series of (Sr1-xCax)3Rh4Sn13 single crystals by means of the electrical resistivity, Hall coefficient, Seebeck coefficient, and 119Sn nuclear magnetic resonance (NMR) spin-lattice relaxation time T1 measurements. In order to elucidate the change of electronic properties along with the structural phase transition at T*~137 K in Sr3Rh4Sn13, the partial substitution of Ca for Sr atoms causes the T* being tunable. In the observation of electrical resistivity, T* is suppressed to lower temperatures with increasing Ca content and finally vanishes in Ca3Rh4Sn13. Furthermore, the structural distortion brings about the variation on the Fermi surfaces is revealed by the Hall and Seebeck measurements. Finally, the result of the 119Sn NMR T1 associated with other experiments will be presented in this talk.

Keywords: Yb3Rh4Sn13-type, phase transition, 119Sn-NMR