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Direct evidence of ...
Direct evidence of real-space pairing in BaBiO3
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- Menushenkov, A. P. (författare)
- Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia.
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- Ivanov, A. (författare)
- Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia.
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- Neverov, V. (författare)
- Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia.
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- Lukyanov, A. (författare)
- Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia.
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- Krasavin, A. (författare)
- Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia.
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- Yastrebtsev, A. A. (författare)
- Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia.
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- Kovalev, I. A. (författare)
- Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia.
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- Zhumagulov, Y. (författare)
- Univ Regensburg, D-93040 Regensburg, Germany.
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- V. Kuznetsov, A. (författare)
- Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia.
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- Popov, V. (författare)
- Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia.
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- Tselikov, G. (författare)
- XPANCEO, Emerging Technol Res Ctr, Emmay Tower, Dubai, U Arab Emirates.
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- Shchetinin, I. (författare)
- Natl Univ Sci & Technol MISiS, Moscow 119049, Russia.
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- Krymskaya, O. (författare)
- Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia.
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- Yaroslavtsev, Alexander (författare)
- Uppsala universitet,FREIA
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- Carley, R. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.
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- Mercadier, L. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.
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- Yin, Z. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.
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- Parchenko, S. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.
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- Hoang, L. P. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.
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- Ghodrati, N. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.
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- Kim, Y. Y. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.
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- Schlappa, J. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.
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- Izquierdo, M. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.
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- Molodtsov, S. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.;TU Bergakad Freiberg, Inst Expt Phys, Leipziger Str 23, D-09599 Freiberg, Germany.;TU Bergakad Freiberg, Ctr Efficient High Temp Proc & Mat Convers ZeHS, Winklerstr 5, D-09599 Freiberg, Germany.
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- Scherz, A. (författare)
- European XFEL GmbH, D-22869 Schenefeld, Germany.
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Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia Univ Regensburg, D-93040 Regensburg, Germany. (creator_code:org_t)
- American Physical Society, 2024
- 2024
- Engelska.
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Ingår i: Physical Review Research. - : American Physical Society. - 2643-1564. ; 6:2
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The parent compound BaBiO3 of bismuthate high-temperature superconductors (HTSCs) BaBi(Pb)O3 and Ba(K)BiO3 with perovskitelike structure exhibits unusual electronic and structural properties, which can be satisfactorily explained if we assume that all charge carriers are in the paired state. However, the prior experiments and the first-principle calculations only indirectly indicate the existence of paired charge carriers in BaBiO3. In this work, we report the direct evidence of initially paired electrons and holes in the upper antibonding Bi 6s-O 2p sigma* orbital of the neighboring octahedral complexes in the ground state of BaBiO3 using the time-resolved x-ray absorption spectroscopy (XAS) to monitor the electron dynamics after the femtosecond resonant 633 nm laser excitation. We observe strong changes in the oxygen K-edge XAS preedge region, defined by the Bi 6s-O 2p sigma* orbitals. We interpret them as a fast (<= 0.3 ps) breaking of charge carrier pairs and slower (0.3-0.8 ps) lattice rearrangement from the distorted monoclinic structure into the new metastable state with a cubic lattice, which persists at least up to 60 ps after the excitation. Analysis of the intermediate state at the fast excitation shows that the bond disproportionation and monoclinic distortion of BaBiO3 structure are energetically favorable due to the charge carrier pairing. Thus the compound BaBiO3 forms a new quantum state that we define as a local pair density wave. Taking into account a large number of similarities between bismuthate and cuprate high-temperature superconductors, we believe that our work will give a new impetus to understanding the nature of superconductivity in perovskite HTSCs.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Teoretisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)
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- Av författaren/redakt...
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Menushenkov, A. ...
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Ivanov, A.
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Neverov, V.
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Lukyanov, A.
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Krasavin, A.
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Yastrebtsev, A. ...
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visa fler...
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Kovalev, I. A.
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Zhumagulov, Y.
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V. Kuznetsov, A.
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Popov, V.
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Tselikov, G.
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Shchetinin, I.
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Krymskaya, O.
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Yaroslavtsev, Al ...
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Carley, R.
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Mercadier, L.
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Yin, Z.
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Parchenko, S.
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Hoang, L. P.
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Ghodrati, N.
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Kim, Y. Y.
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Schlappa, J.
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Izquierdo, M.
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Molodtsov, S.
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Scherz, A.
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Uppsala universitet