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Pressure-tuned spin and charge ordering in an itinerant antiferromagnet

Feng, Yejun and Jaramillo, R. and Srajer, G. and Lang, J. C. and Islam, Z. and Somayazulu, M. S. and Shpyrko, O. G. and Pluth, J. J. and Mao, H.-k. and Isaacs, E. D. and Aeppli, G. and Rosenbaum, T. F. (2007) Pressure-tuned spin and charge ordering in an itinerant antiferromagnet. Physical Review Letters, 99 (13). Art. No. 137201. ISSN 0031-9007. doi:10.1103/PhysRevLett.99.137201.

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Elemental chromium orders antiferromagnetically near room temperature, but the ordering temperature can be driven to zero by applying large pressures. We combine diamond anvil cell and synchrotron x-ray diffraction techniques to measure directly the spin and charge order in the pure metal at the approach to its quantum critical point. Both spin and charge order are suppressed exponentially with pressure, well beyond the region where disorder cuts off such a simple evolution, and they maintain a harmonic scaling relationship over decades in scattering intensity. By comparing the development of the order parameter with that of the magnetic wave vector, it is possible to ascribe the destruction of antiferromagnetism to the growth in electron kinetic energy relative to the underlying magnetic exchange interaction.

Item Type:Article
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URLURL TypeDescription Paper
Feng, Yejun0000-0003-3667-056X
Additional Information:© 2007 The American Physical Society. (Received 10 June 2007; published 24 September 2007) The work at the University of Chicago was under NSF Grant No. DMR-0534296. G.A. acknowledges the Royal Society for financial support. R. J. thanks the NSF Graduate Research program for financial support. Use of APS is supported by the U. S. DOE-BES, under Contract No. NE-AC02-06CH11357. Use of HPCAT is supported by DOE-BES, CDAC, NSF, and the W. M. Keck Foundation.
Funding AgencyGrant Number
NSF Graduate Research FellowshipUNSPECIFIED
Department of Energy (DOE)NE-AC02-06CH11357
W. M. Keck FoundationUNSPECIFIED
Issue or Number:13
Classification Code:PACS numbers: 75.10.Lp, 75.30.Fv, 78.70.Ck, 81.30.Bx
Record Number:CaltechAUTHORS:20140707-163026620
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46938
Deposited By: George Porter
Deposited On:14 Jul 2014 17:35
Last Modified:10 Nov 2021 17:31

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