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Title: Magnetic-Field-Induced Spin Excitations and Renormalized Spin Gap of the Underdoped La{sub 1.895}Sr{sub 0.105}CuO{sub 4} Superconductor

Abstract

High-resolution neutron inelastic scattering experiments in applied magnetic fields have been performed on La{sub 1.895}Sr{sub 0.105}CuO{sub 4} (LSCO). In zero field, the temperature dependence of the low-energy peak intensity at the incommensurate momentum transfer Q{sub IC}=(0.5,0.5{+-}{delta},0),(0.5{+-}{delta},0.5,0) exhibits an anomaly at the superconducting T{sub c} which broadens and shifts to lower temperature upon the application of a magnetic field along the c axis. A field-induced enhancement of the spectral weight is observed, but only at finite energy transfers and in an intermediate temperature range. These observations establish the opening of a strongly downward renormalized spin gap in the underdoped regime of LSCO. This behavior contrasts with the observed doping dependence of most electronic energy features.

Authors:
; ; ; ;  [1]; ;  [2];  [1];  [3];  [1];  [4];  [5];  [6]; ; ;  [7]; ;  [8]; ; more »;  [9] « less
  1. Laboratory for Neutron Scattering, ETH Zurich and PSI Villigen, CH-5232 Villigen PSI (Switzerland)
  2. Condensed Matter Theory Group, Paul Scherrer Institute, CH-5232 Villigen PSI (Switzerland)
  3. (EPFL), CH-1015 Lausanne (Switzerland)
  4. (Denmark)
  5. London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, London (United Kingdom)
  6. (United Kingdom)
  7. Institut Laue-Langevin, BP 156, F-38042 Grenoble (France)
  8. BENSC Hahn-Meitner-Institut, 14109 Berlin Wannsee (Germany)
  9. Department of Physics, Hokkaido University-Sapporo 060-0810 (Japan)
Publication Date:
OSTI Identifier:
20955476
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevLett.98.077004; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER OXIDES; ENERGY TRANSFER; EXCITATION; INELASTIC SCATTERING; LANTHANUM COMPOUNDS; MAGNETIC FIELDS; MOMENTUM TRANSFER; NEUTRONS; SPIN; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE

Citation Formats

Chang, J., Gilardi, R., Pailhes, S., Niedermayer, Ch., Mesot, J., Schnyder, A. P., Mudry, C., Roennow, H. M., Laboratory for Quantum Magnetism, Ecole Polytechnique Federale de Lausanne, Christensen, N. B., Risoe National Laboratory, DK-4000 Roskilde, McMorrow, D. F., ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, Hiess, A., Stunault, A., Enderle, M., Lake, B., Sobolev, O., Momono, N., Oda, M., and Ido, M. Magnetic-Field-Induced Spin Excitations and Renormalized Spin Gap of the Underdoped La{sub 1.895}Sr{sub 0.105}CuO{sub 4} Superconductor. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.077004.
Chang, J., Gilardi, R., Pailhes, S., Niedermayer, Ch., Mesot, J., Schnyder, A. P., Mudry, C., Roennow, H. M., Laboratory for Quantum Magnetism, Ecole Polytechnique Federale de Lausanne, Christensen, N. B., Risoe National Laboratory, DK-4000 Roskilde, McMorrow, D. F., ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, Hiess, A., Stunault, A., Enderle, M., Lake, B., Sobolev, O., Momono, N., Oda, M., & Ido, M. Magnetic-Field-Induced Spin Excitations and Renormalized Spin Gap of the Underdoped La{sub 1.895}Sr{sub 0.105}CuO{sub 4} Superconductor. United States. doi:10.1103/PHYSREVLETT.98.077004.
Chang, J., Gilardi, R., Pailhes, S., Niedermayer, Ch., Mesot, J., Schnyder, A. P., Mudry, C., Roennow, H. M., Laboratory for Quantum Magnetism, Ecole Polytechnique Federale de Lausanne, Christensen, N. B., Risoe National Laboratory, DK-4000 Roskilde, McMorrow, D. F., ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, Hiess, A., Stunault, A., Enderle, M., Lake, B., Sobolev, O., Momono, N., Oda, M., and Ido, M. Fri . "Magnetic-Field-Induced Spin Excitations and Renormalized Spin Gap of the Underdoped La{sub 1.895}Sr{sub 0.105}CuO{sub 4} Superconductor". United States. doi:10.1103/PHYSREVLETT.98.077004.
@article{osti_20955476,
title = {Magnetic-Field-Induced Spin Excitations and Renormalized Spin Gap of the Underdoped La{sub 1.895}Sr{sub 0.105}CuO{sub 4} Superconductor},
author = {Chang, J. and Gilardi, R. and Pailhes, S. and Niedermayer, Ch. and Mesot, J. and Schnyder, A. P. and Mudry, C. and Roennow, H. M. and Laboratory for Quantum Magnetism, Ecole Polytechnique Federale de Lausanne and Christensen, N. B. and Risoe National Laboratory, DK-4000 Roskilde and McMorrow, D. F. and ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX and Hiess, A. and Stunault, A. and Enderle, M. and Lake, B. and Sobolev, O. and Momono, N. and Oda, M. and Ido, M.},
abstractNote = {High-resolution neutron inelastic scattering experiments in applied magnetic fields have been performed on La{sub 1.895}Sr{sub 0.105}CuO{sub 4} (LSCO). In zero field, the temperature dependence of the low-energy peak intensity at the incommensurate momentum transfer Q{sub IC}=(0.5,0.5{+-}{delta},0),(0.5{+-}{delta},0.5,0) exhibits an anomaly at the superconducting T{sub c} which broadens and shifts to lower temperature upon the application of a magnetic field along the c axis. A field-induced enhancement of the spectral weight is observed, but only at finite energy transfers and in an intermediate temperature range. These observations establish the opening of a strongly downward renormalized spin gap in the underdoped regime of LSCO. This behavior contrasts with the observed doping dependence of most electronic energy features.},
doi = {10.1103/PHYSREVLETT.98.077004},
journal = {Physical Review Letters},
number = 7,
volume = 98,
place = {United States},
year = {Fri Feb 16 00:00:00 EST 2007},
month = {Fri Feb 16 00:00:00 EST 2007}
}