標題: | Emergence of a Fermionic Finite-Temperature Critical Point in a Kondo Lattice |
作者: | Chou, Po-Hao Zhai, Liang-Jun Chung, Chung-Hou Mou, Chung-Yu Lee, Ting-Kuo 電子物理學系 Department of Electrophysics |
公開日期: | 27-四月-2016 |
摘要: | The underlying Dirac point is central to the profound physics manifested in a wide class of materials. However, it is often difficult to drive a system with Dirac points across the massless fermionic critical point. Here by exploiting screening of local moments under spin-orbit interactions in a Kondo lattice, we show that below the Kondo temperature, the Kondo lattice undergoes a topological transition from a strong topological insulator to a weak topological insulator at a finite temperature T-D. At T-D, massless Dirac points emerge and the Kondo lattice becomes a Dirac semimetal. Our analysis indicates that the emergent relativistic symmetry dictates nontrivial thermal responses over large parameter and temperature regimes. In particular, it yields critical scaling behaviors both in magnetic and transport responses near T-D. |
URI: | http://dx.doi.org/10.1103/PhysRevLett.116.177002 http://hdl.handle.net/11536/133805 |
ISSN: | 0031-9007 |
DOI: | 10.1103/PhysRevLett.116.177002 |
期刊: | PHYSICAL REVIEW LETTERS |
Volume: | 116 |
Issue: | 17 |
起始頁: | 0 |
結束頁: | 0 |
顯示於類別: | 期刊論文 |