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  Cyclotron resonance inside the Mott gap: A fingerprint of emergent neutral fermions

Rao, P., & Sodemann, I. (2019). Cyclotron resonance inside the Mott gap: A fingerprint of emergent neutral fermions. Physical Review B, 100(15): 155150. doi:10.1103/PhysRevB.100.155150.

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Rao, Peng1, Author           
Sodemann, Inti1, Author           
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1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 MPIPKS: Electronic structure
 Abstract: A major obstacle to identify exotic quantum phases of matter featuring spin-charge separation above one-dimension is the lack of tailored probes allowing to establish their presence in correlated materials. Here we propose an optoelectronic response that could allow to pinpoint the presence of certain spin-charge separated states with emergent neutral gapless fermions in two and three-dimensional materials. We show that even though these states behave like insulators under static electric fields, they can display clear cyclotron resonance peaks in their light absorption spectrum under static magnetic fields, but typically the principal Kohn mode will be missing in comparison to ordinary metals. This distinctive phenomenon could be tested in materials such as triangular lattice organics, three-dimensional mixed valence insulators YbB12 and SmB6, and transition metal dichalcogenides 1T-TaS2 and 1T-TaSe2.

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 Dates: 2019-10-312019-10-15
 Publication Status: Issued
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 100 (15) Sequence Number: 155150 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008