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Optical manipulation of the charge-density-wave state in RbV3Sb5.
Xing, Yuqing; Bae, Seokjin; Ritz, Ethan; Yang, Fan; Birol, Turan; Capa Salinas, Andrea N; Ortiz, Brenden R; Wilson, Stephen D; Wang, Ziqiang; Fernandes, Rafael M; Madhavan, Vidya.
Afiliación
  • Xing Y; Department of Physics and Materials Research Laboratory, University of Illinois Urbana-Champaign, Urbana, IL, USA.
  • Bae S; Department of Physics and Materials Research Laboratory, University of Illinois Urbana-Champaign, Urbana, IL, USA.
  • Ritz E; Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, USA.
  • Yang F; Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, USA.
  • Birol T; Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, USA.
  • Capa Salinas AN; Materials Department, University of California Santa Barbara, Santa Barbara, CA, USA.
  • Ortiz BR; Materials Department, University of California Santa Barbara, Santa Barbara, CA, USA.
  • Wilson SD; Materials Department, University of California Santa Barbara, Santa Barbara, CA, USA.
  • Wang Z; Department of Physics, Boston College, Chestnut Hill, MA, USA.
  • Fernandes RM; School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, USA.
  • Madhavan V; Department of Physics and Materials Research Laboratory, University of Illinois Urbana-Champaign, Urbana, IL, USA. vm1@illinois.edu.
Nature ; 631(8019): 60-66, 2024 Jul.
Article en En | MEDLINE | ID: mdl-38867046
ABSTRACT
Broken time-reversal symmetry in the absence of spin order indicates the presence of unusual phases such as orbital magnetism and loop currents1-4. The recently discovered kagome superconductors AV3Sb5 (where A is K, Rb or Cs)5,6 display an exotic charge-density-wave (CDW) state and have emerged as a strong candidate for materials hosting a loop current phase. The idea that the CDW breaks time-reversal symmetry7-14 is, however, being intensely debated due to conflicting experimental data15-17. Here we use laser-coupled scanning tunnelling microscopy to study RbV3Sb5. By applying linearly polarized light along high-symmetry directions, we show that the relative intensities of the CDW peaks can be reversibly switched, implying a substantial electro-striction response, indicative of strong nonlinear electron-phonon coupling. A similar CDW intensity switching is observed with perpendicular magnetic fields, which implies an unusual piezo-magnetic response that, in turn, requires time-reversal symmetry breaking. We show that the simplest CDW that satisfies these constraints is an out-of-phase combination of bond charge order and loop currents that we dub a congruent CDW flux phase. Our laser scanning tunnelling microscopy data open the door to the possibility of dynamic optical control of complex quantum phenomenon in correlated materials.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Superconductividad Idioma: En Revista: Nature Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Superconductividad Idioma: En Revista: Nature Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido