Detail publikačního výsledku

Microwave Absorption for Detection of Dirac Fermions in SnTe Films

DO PRADO, W.; NAVARRO GIRALDO, J.; TAHSIN, M.; SANTANA, V.T.; ABRAMOF, E.; RAPPL, P.; DE CASTRO, S.; PERES, M.; NEUGEBAUER, P.

Originální název

Microwave Absorption for Detection of Dirac Fermions in SnTe Films

Anglický název

Microwave Absorption for Detection of Dirac Fermions in SnTe Films

Druh

Článek WoS

Originální abstrakt

This work investigates SnTe thin films using microwave absorption as a probe for the presence of Dirac fermions. Shubnikov-de Haas oscillations observed in the microwave absorption signal were analyzed for both uncapped and capped samples, where a BaF2 cap layer was employed to protect the topological surface states from degradation. Unexpectedly, signatures of Dirac fermions were also detected in the uncapped sample, despite previous magnetotransport measurements showing no evidence of their presence. This finding provides strong evidence that the topological surface states are robust against deterioration due to atmospheric exposure and that microwave absorption measurements can reveal these states even when they are not accessible through transport measurements. Furthermore, Zeeman splitting was observed in the fast Fourier transform of the oscillations, indicating the presence of low-mobility channels that had previously been detected only at higher magnetic fields.

Anglický abstrakt

This work investigates SnTe thin films using microwave absorption as a probe for the presence of Dirac fermions. Shubnikov-de Haas oscillations observed in the microwave absorption signal were analyzed for both uncapped and capped samples, where a BaF2 cap layer was employed to protect the topological surface states from degradation. Unexpectedly, signatures of Dirac fermions were also detected in the uncapped sample, despite previous magnetotransport measurements showing no evidence of their presence. This finding provides strong evidence that the topological surface states are robust against deterioration due to atmospheric exposure and that microwave absorption measurements can reveal these states even when they are not accessible through transport measurements. Furthermore, Zeeman splitting was observed in the fast Fourier transform of the oscillations, indicating the presence of low-mobility channels that had previously been detected only at higher magnetic fields.

Klíčová slova

cap layer, dirac fermions, microwave, Shubnikov-de Haas oscillations, Tin telluride

Klíčová slova v angličtině

cap layer, dirac fermions, microwave, Shubnikov-de Haas oscillations, Tin telluride

Autoři

DO PRADO, W.; NAVARRO GIRALDO, J.; TAHSIN, M.; SANTANA, V.T.; ABRAMOF, E.; RAPPL, P.; DE CASTRO, S.; PERES, M.; NEUGEBAUER, P.

Vydáno

01.05.2026

Nakladatel

Wiley

Periodikum

Advanced Materials Interfaces

Svazek

13

Číslo

10

Stát

Spolková republika Německo

Strany počet

7

URL

https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/admi.70473?getft_integrator=clarivate&src=getftr&utm_source=clarivate

BibTex

@article{BUT201835,
  author="{} and Jorge Andres {Navarro Giraldo} and Muhammad {Tahsin} and Vinicius Tadeu {Santana} and  {} and  {} and  {} and  {} and Petr {Neugebauer}",
  title="Microwave Absorption for Detection of Dirac Fermions in SnTe Films",
  journal="Advanced Materials Interfaces",
  year="2026",
  volume="13",
  number="10",
  pages="7",
  doi="10.1002/admi.70473",
  issn="2196-7350",
  url="https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/admi.70473?getft_integrator=clarivate&src=getftr&utm_source=clarivate"
}