Ruegg, C;
Normand, B;
Matsumoto, M;
Furrer, A;
McMorrow, DF;
Kramer, KW;
Gudel, HU;
... Boehm, M; + view all
(2008)
Quantum magnets under pressure: Controlling elementary excitations in TlCuCl3.
PHYS REV LETT
, 100
(20)
, Article 205701. 10.1103/PhysRevLett.100.205701.
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Abstract
We follow the evolution of the elementary excitations of the quantum antiferromagnet TlCuCl3 through the pressure-induced quantum critical point, which separates a dimer-based quantum disordered phase from a phase of long-ranged magnetic order. We demonstrate by neutron spectroscopy the continuous emergence in the weakly ordered state of a low-lying but massive excitation corresponding to longitudinal fluctuations of the magnetic moment. This mode is not present in a classical description of ordered magnets, but is a direct consequence of the quantum critical point.
| Type: | Article |
|---|---|
| Title: | Quantum magnets under pressure: Controlling elementary excitations in TlCuCl3 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.100.205701 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.100.205701 |
| Language: | English |
| Additional information: | © 2008 The American Physical Society |
| Keywords: | ONE-DIMENSIONAL ANTIFERROMAGNETS, PHASE-TRANSITIONS, SYSTEM TLCUCL3, INSULATORS |
| 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.ucl.ac.uk/id/eprint/129532 |
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