Anomalous Hall effect from gapped nodal line in the Co2FeGe Heusler compound

被引：35

作者：

Shukla, Gaurav K. ^{[1
]}

Sau, Jyotirmoy ^{[2
]}

Shahi, Nisha ^{[1
]}

Singh, Anupam K. ^{[1
]}

Kumar, Manoranjan ^{[2
]}

Singh, Sanjay ^{[1
]}

机构：

[1] Banaras Hindu Univ, Indian Inst Technol, Sch Mat Sci & Technol, Varanasi 221005, Uttar Pradesh, India

[2] SN Bose Natl Ctr Basic Sci, Kolkata 700098, W Bengal, India

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 20期

关键词：

WEYL SEMIMETAL PHASE; ALLOY; DISCOVERY; TRANSPORT; FERMIONS;

D O I：

10.1103/PhysRevB.104.195108

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Full Heusler compounds with cobalt as a primary element show anomalous transport properties owing to the Weyl fermions and broken time-reversal symmetry. We present here the study of anomalous Hall effect (AHE) in the Co2FeGe Heusler compound. The experiment reveals anomalous Hall conductivity (AHC) -100 S/cm at room temperature with an intrinsic contribution of -78 S/cm. The analysis of anomalous Hall resistivity suggests the scattering independent intrinsic mechanism dominates the overall behavior of anomalous Hall resistivity. The first principles calculation reveals that the Berry curvature originated by a gapped nodal line near EF is the main source of AHE in the Co2FeGe Heusler compound. The theoretically calculated AHC is in agreement with the experiment.

引用

页数：9