Field-induced soft-mode quantum phase transition in La$_{1.855}$Sr$_{0.145}$CuO$_{4}$

J. Chang; N. B. Christensen; Ch. Niedermayer; K. Lefmann; H. M. Roennow; D. F. McMorrow; A. Schneidewind; P. Link; A. Hiess; M. Boehm; R. Mottl; S. Pailhes; N. Momono; M. Oda; M. Ido; J. Mesot

doi:10.1103/PhysRevLett.102.177006

Field-induced soft-mode quantum phase transition in La$_{1.855}$Sr$_{0.145}$CuO$_{4}$

Superconductivity 2009-05-01 v1 Strongly Correlated Electrons

Authors: J. Chang , N. B. Christensen , Ch. Niedermayer , K. Lefmann , H. M. Roennow , D. F. McMorrow , A. Schneidewind , P. Link , A. Hiess , M. Boehm , R. Mottl , S. Pailhes , N. Momono , M. Oda , M. Ido , J. Mesot

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Abstract

Inelastic neutron-scattering experiments on the high-temperature superconductor La $_{1.855}$ Sr $_{0.145}$ CuO $_{4}$ reveal a magnetic excitation gap $\Delta$ that decreases continuously upon application of a magnetic field perpendicular to the CuO $_2$ planes. The gap vanishes at the critical field required to induce long-range incommensurate antiferromagnetic order, providing compelling evidence for a field-induced soft-mode driven quantum phase transition.

Keywords

quantum phase transition soft mode high-temperature superconductor magnetic excitation gap incommensurate antiferromagnetic order La_{1.855}Sr_{0.145}CuO_4

Cite

@article{arxiv.0902.1191,
  title  = {Field-induced soft-mode quantum phase transition in La$_{1.855}$Sr$_{0.145}$CuO$_{4}$},
  author = {J. Chang and N. B. Christensen and Ch. Niedermayer and K. Lefmann and H. M. Roennow and D. F. McMorrow and A. Schneidewind and P. Link and A. Hiess and M. Boehm and R. Mottl and S. Pailhes and N. Momono and M. Oda and M. Ido and J. Mesot},
  journal= {arXiv preprint arXiv:0902.1191},
  year   = {2009}
}

Field-induced soft-mode quantum phase transition in La$_{1.855}$Sr$_{0.145}$CuO$_{4}$

Abstract

Keywords

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