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Mass fluctuations and absorption rates in dark-matter sensors based on Dirac materials
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Stockholm University, Faculty of Science, Department of Physics.
Number of Authors: 22020 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 101, no 4, article id 045120Article in journal (Refereed) Published
Abstract [en]

We study the mass fluctuations in gapped Dirac materials by treating the mass term as both a continuous and discrete random variable. Gapped Dirac materials were proposed to be used as materials for dark-matter sensors. One thus would need to estimate the role of disorder and fluctuations on the interband absorption of dark matter. We find that both continuous and discrete fluctuations across the sample introduce tails (e.g., Dirac-Lifshitz tails) in the density of states and the interband absorption rate. We estimate the strength of the gap filling and discuss implications of these fluctuations on the performance as sensors for dark matter detection. The approach used in this work provides a basic framework to model the disorder by any arbitrary mechanism on the interband absorption of Dirac material sensors.

Place, publisher, year, edition, pages
2020. Vol. 101, no 4, article id 045120
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-178812DOI: 10.1103/PhysRevB.101.045120ISI: 000507511400006OAI: oai:DiVA.org:su-178812DiVA, id: diva2:1393584
Available from: 2020-02-17 Created: 2020-02-17 Last updated: 2020-02-17Bibliographically approved

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Olsthoorn, BartBalatsky, Alexander
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