Topology stabilized fluctuations in a magnetic nodal semimetal

Nathan C. Drucker, Thanh Nguyen, Fei Han, Phum Siriviboon, Xi Luo, Nina Andrejevic, Ziming Zhu, Grigory Bednik, Quynh T. Nguyen, Zhantao Chen, Linh K. Nguyen, Tongtong Liu, Travis J. Williams, Matthew B. Stone, Alexander I. Kolesnikov, Songxue Chi, Jaime Fernandez-Baca, Christie S. Nelson, Ahmet Alatas, Tom HoganAlexander A. Puretzky, Shengxi Huang, Yue Yu, Mingda Li

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The interplay between magnetism and electronic band topology enriches topological phases and has promising applications. However, the role of topology in magnetic fluctuations has been elusive. Here, we report evidence for topology stabilized magnetism above the magnetic transition temperature in magnetic Weyl semimetal candidate CeAlGe. Electrical transport, thermal transport, resonant elastic X-ray scattering, and dilatometry consistently indicate the presence of locally correlated magnetism within a narrow temperature window well above the thermodynamic magnetic transition temperature. The wavevector of this short-range order is consistent with the nesting condition of topological Weyl nodes, suggesting that it arises from the interaction between magnetic fluctuations and the emergent Weyl fermions. Effective field theory shows that this topology stabilized order is wavevector dependent and can be stabilized when the interband Weyl fermion scattering is dominant. Our work highlights the role of electronic band topology in stabilizing magnetic order even in the classically disordered regime.

Original languageEnglish
Article number5182
JournalNature Communications
Volume14
Issue number1
DOIs
StatePublished - Dec 2023

Funding

NCD, TN and FH acknowledge the support from U.S. Department of Energy (DOE), Office of Science (SC), Basic Energy Sciences (BES), Award No. DE-SC0020148. NCD, TN and ZC acknowledge National Science Foundation (NSF) Designing Materials to Revolutionize and Engineer our Future (DMREF) Program with Award No. DMR-2118448. TL and ML are partially supported by NSF Convergence Accelerator Award No. 2235945. ML acknowledges the support from Class of 1947 Career Development Professor Chair. SH acknowledges support from National Science Foundation (NSF), Award No. 2230400 and Welch Foundation Award No. C-2144. The research on neutron scattering used resources at Oak Ridge National Laboratory’s High Flux Isotope Reactor (HFIR) and Spallation Neutron Source (SNS) which are sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. Raman measurements were conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. The X-ray scattering measurements used resources of the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract No. DE-SC0012704 and of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.

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