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| Quantum phase transition of a magnet in a spin bath |
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| Author(s): Ronnow HM, Parthasarathy R, Jensen J, Aeppli G, Rosenbaum TF, McMorrow DF |
| Source: SCIENCE Volume: 308 Issue: 5720 Pages: 389-392 Published: APR 15 2005 |
| Times Cited: 24 References: 29 |
| Abstract: The excitation spectrum of a model magnetic system, LiHoF4, was studied with the use of neutron spectroscopy as the system was tuned to its quantum critical point by an applied magnetic field. The electronic mode softening expected for a quantum phase transition was forestalled by hyperfine coupling to the nuclear spins. We found that interactions with the nuclear spin bath controlled the length scale over which the excitations could be entangled. This generic result places a limit on our ability to observe intrinsic electronic quantum criticality. |
| Document Type: Article |
| Language: English |
| Reprint Address: Ronnow, HM (reprint author), ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland |
Addresses:
1. ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland
2. Paul Scherrer Inst, CH-5232 Villigen, Switzerland
3. Univ Chicago, James Franck Inst, Chicago, IL 60637 USA
4. Univ Chicago, Dept Phys, Chicago, IL 60637 USA
5. Riso Natl Lab, DK-4000 Roskilde, Denmark
6. Niels Bohr Inst fAPG, Orsted Lab, DK-2100 Copenhagen, Denmark
7. UCL, London Ctr Nanotechnol, London WC1E 6BT, England
8. UCL, Dept Phys & Astron, London WC1E 6BT, England
9. Rutherford Appleton Lab, ISIS, Didcot OX11 0QX, Oxon England |
| Publisher: AMER ASSOC ADVANCEMENT SCIENCE, 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: 917TL |
| ISSN: 0036-8075 |
| DOI: 10.1126/science.1108317 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |