Work

Quantum Magnets under Pressure: Controlling Elementary Excitations in TlCuCl3

Year: 2008

Type: article

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.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.100.205701

Authors: Ch. Rüegg, B. Normand, M. Matsumoto, A. Furrer, D. F. McMorrow, K. W. Krämer, H. -U. Güdel, S. N. Gvasaliya, H. Mutka, M. Boehm

Institutions: London Centre for Nanotechnology, University College London, University of Fribourg, ETH Zurich, Institute for Theoretical Physics, Shizuoka University, Paul Scherrer Institute, University of Bern, Institut Laue-Langevin

Language: English

Topic: Advanced Condensed Matter Physics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Paul Scherrer Institut, Engineering and Physical Sciences Research Council

Awards: NSF: Quantum Frustration, G3350451011, Quantum fluctuations and criticality in model magnets

OpenAlex ID: W2015505672

FWCI: 5.792

Cites: 21

Cited by: 284

Related to: 9