Lattice distortion associated with Fermi-surface reconstruction in Sr3Rh4Sn13

被引:39
作者
Kuo, C. N. [1 ]
Tseng, C. W. [1 ]
Wang, C. M. [1 ]
Wang, C. Y. [2 ]
Chen, Y. R. [2 ]
Wang, L. M. [2 ]
Lin, C. F. [3 ]
Wu, K. K. [3 ]
Kuo, Y. K. [3 ]
Lue, C. S. [1 ,4 ]
机构
[1] Natl Cheng Kung Univ, Dept Phys, Tainan 70101, Taiwan
[2] Natl Taiwan Univ, Dept Phys, Taipei 10601, Taiwan
[3] Natl Dong Hwa Univ, Dept Phys, Hualien 97401, Taiwan
[4] Minist Sci & Technol, Taiwan Consortium Emergent Crystalline Mat, Taipei 10601, Taiwan
来源
PHYSICAL REVIEW B | 2015年 / 91卷 / 16期
关键词
D O I
10.1103/PhysRevB.91.165141
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Superconducting Sr3Rh4Sn13 has been of current interest due to indications of a characteristic phase transition associated with structural distortions in its normal state. To further shed light on the nature of the phase transition, we performed a detailed study of single crystalline Sr3Rh4Sn13 by means of the thermal expansion, electrical resistivity, Hall coefficient, Seebeck coefficient, thermal conductivity, as well as Sn-119 nuclear magnetic resonance (NMR) measurements, mainly focusing on the signatures around the phase transition temperature T* = 137 K. The phase transition has been characterized by marked features near T* in all measured physical quantities. In particular, the NMR characteristics provide microscopic evidence for the reduction in the electronic Fermi-level density of states (DOSs) below T*. Based on the analysis of the Sn-119 NMR spin-lattice relaxation rate, we clearly demonstrated that the Sn 5s partial Fermi-level DOS in Sr3Rh4Sn13 is reduced by 13% across the phase transition. In this respect, it points to the strong association between electronic and structural instability for the peculiar phase transition in Sr3Rh4Sn13.
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页数:7
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