A distinct bosonic mode in an electron-doped high-transition-temperature superconductor

F. C. Niestemski, S. Kunwar, S. Zhou, Shiliang Li, H. Ding, Ziqiang Wang, Pengcheng Dai and V. Madhavan ()
Additional contact information
F. C. Niestemski: Boston College, Chestnut Hill, Massachusetts 02467, USA
S. Kunwar: Boston College, Chestnut Hill, Massachusetts 02467, USA
S. Zhou: Boston College, Chestnut Hill, Massachusetts 02467, USA
Shiliang Li: The University of Tennessee, Knoxville, Tennessee 37996-1200, USA
H. Ding: Boston College, Chestnut Hill, Massachusetts 02467, USA
Ziqiang Wang: Boston College, Chestnut Hill, Massachusetts 02467, USA
Pengcheng Dai: The University of Tennessee, Knoxville, Tennessee 37996-1200, USA
V. Madhavan: Boston College, Chestnut Hill, Massachusetts 02467, USA

Nature, 2007, vol. 450, issue 7172, 1058-1061

Abstract: Superconductivity's glue Perhaps the most debated current issue in the field of high-temperature superconductivity is the microscopic origin of the superconducting 'glue' that binds electrons into superconducting pairs. The leading contenders are lattice vibrations (phonons) and spin excitations, with the additional possibility of pairing without mediators. Niestemski et al. report spatially resolved, reproducible spectroscopy of the electron-doped superconductor known as PLCCO that reveal a collective mode in the material's electronic excitations at 10.5 ± 2.5 meV. This is consistent with an electronic origin of the mode — and possibly the superconducting 'glue' — consistent with the involvement of spin-excitations rather than phonons.

Date: 2007
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DOI: 10.1038/nature06430

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