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Bound States and Field-Polarized Haldane Modes in a Quantum Spin Ladder.
Ward, S; Mena, M; Bouillot, P; Kollath, C; Giamarchi, T; Schmidt, K P; Normand, B; Krämer, K W; Biner, D; Bewley, R; Guidi, T; Boehm, M; McMorrow, D F; Rüegg, Ch.
Afiliación
  • Ward S; Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
  • Mena M; London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom.
  • Bouillot P; Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland.
  • Kollath C; Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
  • Giamarchi T; London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom.
  • Schmidt KP; Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland.
  • Normand B; Department of Medical Imaging and Information Sciences, Interventional Neuroradiology Unit, University Hospitals of Geneva, CH-1211 Geneva, Switzerland.
  • Krämer KW; Laboratory for Hydraulic Machines, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
  • Biner D; Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland.
  • Bewley R; HISKP, University of Bonn, Nussallee 14-16, 53115 Bonn, Germany.
  • Guidi T; Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland.
  • Boehm M; Theoretische Physik I, Staudtstrasse 7, FAU Erlangen-Nürnberg, 91058 Erlangen, Germany.
  • McMorrow DF; Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
  • Rüegg C; Department of Chemistry and Biochemistry, University of Bern, CH-3012 Bern, Switzerland.
Phys Rev Lett ; 118(17): 177202, 2017 Apr 28.
Article en En | MEDLINE | ID: mdl-28498681
The challenge of one-dimensional systems is to understand their physics beyond the level of known elementary excitations. By high-resolution neutron spectroscopy in a quantum spin-ladder material, we probe the leading multiparticle excitation by characterizing the two-magnon bound state at zero field. By applying high magnetic fields, we create and select the singlet (longitudinal) and triplet (transverse) excitations of the fully spin-polarized ladder, which have not been observed previously and are close analogs of the modes anticipated in a polarized Haldane chain. Theoretical modeling of the dynamical response demonstrates our complete quantitative understanding of these states.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2017 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2017 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Estados Unidos