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Title: Multi-$$\mathcal{k}$$ magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe

Abstract

Here, the magnetic structure, magnetoresistance (MR), and Hall effect of the noncentrosymmetric magnetic semimetal NdAlGe are investigated, revealing an unusual magnetic state and anomalous transport properties that are associated with the electronic structure of this compound. The magnetization and MR measurements are both highly anisotropic and indicate an Ising-like magnetic system. The magnetic structure is complex in that it involves two magnetic ordering vectors, including an incommensurate spin density wave and commensurate ferrimagnetic state in zero field. We have discovered a large anomalous Hall conductivity that reaches ≈430 Ω–1cm–1, implying that it originates from an intrinsic Berry curvature effect stemming from Weyl nodes found in the electronic structure. These electronic structure calculations indicate the presence of nested Fermi surface pockets with nesting wave vectors like the measured magnetic ordering wave vector and the presence of Weyl nodes in proximity to the Fermi surface. We associate the incommensurate magnetic structure with the large anomalous Hall response to be the result of the combination of Fermi surface nesting and the Berry curvature associated with Weyl nodes.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [4]; ORCiD logo [3]; ORCiD logo [5]; ORCiD logo [5]; ORCiD logo [5]; ORCiD logo [5]; ORCiD logo [5];  [6]; ORCiD logo [1];  [1]; ORCiD logo [7]; ORCiD logo [8];  [9]; ORCiD logo [10];  [11]
  1. Kennesaw State University, GA (United States)
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  3. Univ. Nacional Autonoma de Mexico (UNAM), Mexico City (Mexico)
  4. University of the North (Colombia)
  5. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
  6. Prairie View A & M Univ., Prairie View, TX (United States); Louisiana State Univ., Baton Rouge, LA (United States)
  7. Louisiana State Univ., Baton Rouge, LA (United States)
  8. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  9. Emory Univ., Atlanta, GA (United States)
  10. Louisiana State Univ., Baton Rouge, LA (United States); Univ. of South Carolina, Columbia, SC (United States)
  11. Louisiana State Univ., Baton Rouge, LA (United States); Indiana Univ.-Purdue Univ. Indianapolis (IUPUI), Indianapolis, IN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)
OSTI Identifier:
1987761
Grant/Contract Number:  
AC05-00OR22725; SC0012432; DMR-2213443; DMR-1644779
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B
Additional Journal Information:
Journal Volume: 107; Journal Issue: 22; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; magnetic phase transitions; magnetism; magnetotransport; topological materials; crystal structures; magnetization measurements; neutron scattering

Citation Formats

Dhital, Chetan, Dally, Rebecca L., Ruvalcaba, R., Gonzalez-Hernandez, R., Guerrero-Sanchez, J., Cao, Huibo B., Zhang, Qiang, Tian, Wei, Wu, Yan, Frontzek, Matthias D., Karna, Sunil K., Meads, A., Wilson, B., Chapai, R., Graf, D., Bacsa, John, Jin, Rongying, and DiTusa, J. F. Multi-$\mathcal{k}$ magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe. United States: N. p., 2023. Web. doi:10.1103/physrevb.107.224414.
Dhital, Chetan, Dally, Rebecca L., Ruvalcaba, R., Gonzalez-Hernandez, R., Guerrero-Sanchez, J., Cao, Huibo B., Zhang, Qiang, Tian, Wei, Wu, Yan, Frontzek, Matthias D., Karna, Sunil K., Meads, A., Wilson, B., Chapai, R., Graf, D., Bacsa, John, Jin, Rongying, & DiTusa, J. F. Multi-$\mathcal{k}$ magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe. United States. https://doi.org/10.1103/physrevb.107.224414
Dhital, Chetan, Dally, Rebecca L., Ruvalcaba, R., Gonzalez-Hernandez, R., Guerrero-Sanchez, J., Cao, Huibo B., Zhang, Qiang, Tian, Wei, Wu, Yan, Frontzek, Matthias D., Karna, Sunil K., Meads, A., Wilson, B., Chapai, R., Graf, D., Bacsa, John, Jin, Rongying, and DiTusa, J. F. Tue . "Multi-$\mathcal{k}$ magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe". United States. https://doi.org/10.1103/physrevb.107.224414.
@article{osti_1987761,
title = {Multi-$\mathcal{k}$ magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe},
author = {Dhital, Chetan and Dally, Rebecca L. and Ruvalcaba, R. and Gonzalez-Hernandez, R. and Guerrero-Sanchez, J. and Cao, Huibo B. and Zhang, Qiang and Tian, Wei and Wu, Yan and Frontzek, Matthias D. and Karna, Sunil K. and Meads, A. and Wilson, B. and Chapai, R. and Graf, D. and Bacsa, John and Jin, Rongying and DiTusa, J. F.},
abstractNote = {Here, the magnetic structure, magnetoresistance (MR), and Hall effect of the noncentrosymmetric magnetic semimetal NdAlGe are investigated, revealing an unusual magnetic state and anomalous transport properties that are associated with the electronic structure of this compound. The magnetization and MR measurements are both highly anisotropic and indicate an Ising-like magnetic system. The magnetic structure is complex in that it involves two magnetic ordering vectors, including an incommensurate spin density wave and commensurate ferrimagnetic state in zero field. We have discovered a large anomalous Hall conductivity that reaches ≈430 Ω–1cm–1, implying that it originates from an intrinsic Berry curvature effect stemming from Weyl nodes found in the electronic structure. These electronic structure calculations indicate the presence of nested Fermi surface pockets with nesting wave vectors like the measured magnetic ordering wave vector and the presence of Weyl nodes in proximity to the Fermi surface. We associate the incommensurate magnetic structure with the large anomalous Hall response to be the result of the combination of Fermi surface nesting and the Berry curvature associated with Weyl nodes.},
doi = {10.1103/physrevb.107.224414},
journal = {Physical Review. B},
number = 22,
volume = 107,
place = {United States},
year = {Tue Jun 13 00:00:00 EDT 2023},
month = {Tue Jun 13 00:00:00 EDT 2023}
}

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