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Multiple spin-orbit...
Multiple spin-orbit excitons and the electronic structure of alpha-RuCl3
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- Warzanowski, P. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Borgwardt, N. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Hopfer, K. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Attig, J. (författare)
- Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany.
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- Koethe, T. C. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Becker, P. (författare)
- Univ Cologne, Inst Geol & Mineral, Sect Crystallog, D-50674 Cologne, Germany.
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- Tsurkan, V (författare)
- Univ Augsburg, Ctr Elect Correlat & Magnetism, Expt Phys 5, D-86135 Augsburg, Germany.;Inst Appl Phys, MD-2028 Kishinev, Moldova.
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- Loidl, A. (författare)
- Univ Augsburg, Ctr Elect Correlat & Magnetism, Expt Phys 5, D-86135 Augsburg, Germany.
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- Hermanns, Maria (författare)
- Stockholms universitet,KTH,Nordic Institute for Theoretical Physics NORDITA,Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden.,Fysikum,Nordiska institutet för teoretisk fysik (Nordita),Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- van Loosdrecht, P. H. M. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Grueninger, M. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany. (creator_code:org_t)
- American Physical Society (APS), 2020
- 2020
- Engelska.
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Ingår i: Physical Review Research. - : American Physical Society (APS). - 2643-1564. ; 2:4
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The honeycomb compound alpha-RuCl3 is widely discussed as a proximate Kitaev spin-liquid material. This scenario builds on spin-orbit entangled j = 1/2 moments arising for a t(2g)(5) electron configuration with strong spin-orbit coupling lambda and a large cubic crystal field. The actual low-energy electronic structure of alpha-RuCl3, however, is still puzzling. In particular, infrared absorption features at 0.30, 0.53, and 0.75 eV seem to be at odds with a j = 1/2 scenario. Also the energy of the spin-orbit exciton, the excitation from j = 1/2 to 3/2, and thus the value of lambda, are controversial. Combining infrared and Raman data, we show that the infrared features can be attributed to single, double, and triple spin-orbit excitons. We find lambda = 0.16 eV and Delta = 42(4) meV for the observed noncubic crystal-field splitting, supporting the validity of the j = 1/2 picture for alpha-RuCl3. The unusual strength of the double excitation is related to the underlying hopping interactions, which form the basis for dominant Kitaev exchange.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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Warzanowski, P.
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Borgwardt, N.
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Hopfer, K.
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Attig, J.
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Koethe, T. C.
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Becker, P.
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visa fler...
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Tsurkan, V
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Loidl, A.
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Hermanns, Maria
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van Loosdrecht, ...
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Grueninger, M.
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