Published April 15, 2005
| Submitted
Journal Article
Open
Quantum phase transition of a magnet in a spin bath
Abstract
The excitation spectrum of a model magnetic system, LiHoF_4, 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.
Additional Information
© 2005 American Association for the Advancement of Science. Received for publication 6 December 2004. Accepted for publication 23 February 2005. We thank G. McIntyre for his expert assistance during complementary measurements on the D10 diffractometer at the Institut Laue Langevin, Grenoble, France. Work at the University of Chicago was supported by NSF Materials Research Science and Engineering Centers grant DMR-0213745. Work in London was supported by the Wolfson–Royal Society Research Merit Award Program and the Basic Technologies program of the UK Research Councils.Attached Files
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Additional details
- Eprint ID
- 46953
- DOI
- 10.1126/science.1108317
- Resolver ID
- CaltechAUTHORS:20140707-163028622
- NSF
- DMR-0213745
- Wolfson Royal Society Research Merit Award
- Research Councils UK (RCUK)
- Created
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2014-07-14Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field