Chang, J;
Christensen, NB;
Niedermayer, C;
Lefmann, K;
Ronnow, HM;
McMorrow, DF;
Schneidewind, A;
... Mesot, J; + view all
(2009)
Magnetic-Field-Induced Soft-Mode Quantum Phase Transition in the High-Temperature Superconductor La1.855Sr0.145CuO4: An Inelastic Neutron-Scattering Study.
PHYS REV LETT
, 102
(17)
, Article 177006. 10.1103/PhysRevLett.102.177006.
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Abstract
Inelastic neutron-scattering experiments on the high-temperature superconductor La1.855Sr0.145CuO4 reveal a magnetic excitation gap Delta that decreases continuously upon application of a magnetic field perpendicular to the CuO2 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.
| Type: | Article |
|---|---|
| Title: | Magnetic-Field-Induced Soft-Mode Quantum Phase Transition in the High-Temperature Superconductor La1.855Sr0.145CuO4: An Inelastic Neutron-Scattering Study |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.102.177006 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.102.177006 |
| Language: | English |
| Additional information: | © 2009 The American Physical Society |
| Keywords: | SPIN, DYNAMICS, STATE, GAP, ORDER |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/140987 |
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