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Charge Density Waves and Magnetism in Topological Semimetal Candidates GdSb x Te 2− x − δ
Author(s) -
Lei Shiming,
Duppel Viola,
Lippmann Judith M.,
Nuss Jürgen,
Lotsch Bettina V.,
Schoop Leslie M.
Publication year - 2019
Publication title -
advanced quantum technologies
Language(s) - English
Resource type - Journals
ISSN - 2511-9044
DOI - 10.1002/qute.201900045
Subject(s) - semimetal , magnetism , tetragonal crystal system , condensed matter physics , topology (electrical circuits) , superstructure , electronic band structure , topological quantum number , charge density wave , topological order , crystal structure , materials science , band gap , physics , crystallography , chemistry , quantum mechanics , superconductivity , mathematics , combinatorics , quantum , thermodynamics
Many topological semimetals are known to exhibit exceptional electronic properties, which are the fundamental basis for design of novel devices and further applications. Materials containing the structural motif of a square net are known to frequently be topological semimetals. In this work, the synthesis and structural characterization of the square‐net‐based magnetic topological semimetal candidates GdSb x Te 2− x − δ (0 ≤ x ≤ 1 , δ indicating the vacancy level) are reported. The structural evolution of the series with Sb substitution is studied, finding a transition between a simple tetragonal square‐net structure to complex superstructure formations due to the presence of charge density waves. The structural modulations coincide with a significant modification of the magnetic order. This work thus establishes GdSb x Te 2− x − δ as a platform to study the interplay between crystal symmetry, band filling, charge density wave, and magnetism in a topological semimetal candidate.