Phase diagram of three dimensional disordered nodal-line semimetals: weak localization to Anderson localization

Nodal-line semimetals are new members of the topological materials family whose experimental characterization has seen recent progress using both ARPES and quantum oscillation measurements. Here, we theoretically study the presence of a disorder-induced phase transition in a cubic lattice nodal-line...

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Bibliographic Details
Published in:New journal of physics 2023-11, Vol.25 (11), p.113033
Main Authors: Jia, K X, Liu, X Y, Ma, R, Geng, H, Sheng, L, Xing, D Y
Format: Article
Language:English
Subjects:
Anderson localization
Cubic lattice
disorder
Electrons
Energy
Fourier transforms
Localization
Low temperature
Mathematical analysis
Metalloids
nodal-line semimetal
phase diagram
Phase diagrams
Phase transitions
Physics
topological material
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Summary:Nodal-line semimetals are new members of the topological materials family whose experimental characterization has seen recent progress using both ARPES and quantum oscillation measurements. Here, we theoretically study the presence of a disorder-induced phase transition in a cubic lattice nodal-line semimetal using numerical diagonalization and spectral calculations. In contrast to the 3D nodal-point semimetals, we found that nodal-line semimetals do not display a stable disordered semimetal phase, as an infinitely weak disorder can lead to a diffusive metal phase. The absence of a semimetal phase is also reflected in the quadratic relationship of the electronic specific heat at low temperatures. Furthermore, we illustrate that a localization transition occurs under the influence of strong disorder, shifting the material from a weakly localized diffusive metal state to an Anderson insulator. This transition is substantiated by calculating the adjacent gap ratio and the typical density of states.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/ad08f4