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.

引用

页数：4

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