Evidence for Three-dimensional Dirac Semimetal State in Strongly Correlated Organic Quasi-two-dimensional Material

被引：2
|
作者：
Tajima, Naoya [1 ]
Kawasugi, Yoshitaka [1 ]
Morinari, Takao [2 ]
Oka, Ryuhei [3 ]
Naito, Toshio [3 ]
Kato, Reizo [4 ]
机构：
[1] Toho Univ, Dept Phys, Funabashi, Chiba 2748510, Japan
[2] Kyoto Univ, Grad Sch Human & Environm Studies, Course Studies Mat Sci, Kyoto 6068501, Japan
[3] Ehime Univ, Dept Chem, Matsuyama 7908577, Japan
[4] RIKEN, Saitama 3510198, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2023年 / 92卷 / 12期
关键词：
WEYL FERMIONS; MAGNETORESISTANCE; CONDUCTOR; PHASE;
D O I：
10.7566/JPSJ.92.123702
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The three-dimensional Dirac semimetal is distinct from its two-dimensional counterpart due to its dimensionality and symmetry. Here, we observe that molecule-based quasi-two-dimensional Dirac fermion system, alpha-(BEDT-TTF)2I3, exhibits chiral anomaly-induced negative magnetoresistance and planar Hall effect upon entering the coherent inter-layer tunneling regime under high pressure. Time-reversal symmetry is broken due to the strong electronic correlation effect, while the spin-orbit coupling effect is negligible. The system provides an ideal platform for investigating the chiral anomaly physics by controlling dimensionality and strong electronic correlation.
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页数：4
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