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Hidden order in URu...
Hidden order in URu2Si2 originates from Fermi surface gapping induced by dynamic symmetry breaking
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- Elgazzar, S (author)
- Uppsala universitet,Institutionen för fysik och materialvetenskap
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- Rusz, Jan (author)
- Uppsala universitet,Institutionen för fysik och materialvetenskap
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- Amft, Martin (author)
- Uppsala universitet,Institutionen för fysik och materialvetenskap
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- Oppeneer, Peter M. (author)
- Uppsala universitet,Institutionen för fysik och materialvetenskap
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Mydosh, J. A. (author)
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(creator_code:org_t)
- 2009
- 2009
- English.
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In: Nature Materials. - 1476-1122 .- 1476-4660. ; 8:4, s. 337-341
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Spontaneous, collective ordering of electronic degrees of freedom leads to second-order phase transitions that are characterized by an order parameter driving the transition. The notion of a 'hidden order' has recently been used for a variety of materials where a clear phase transition occurs without a known order parameter. The prototype example is the heavy-fermion compound URu2Si2, where a mysterious hidden-order transition occurs at 17.5 K. For more than twenty years this system has been studied theoretically and experimentally without a firm grasp of the underlying physics. Here, we provide a microscopic explanation of the hidden order using density-functional theory calculations. We identify the Fermi surface 'hot spots' where degeneracy induces a Fermi surface instability and quantify how symmetry breaking lifts the degeneracy, causing a surprisingly large Fermi surface gapping. As the mechanism for the hidden order, we deduce spontaneous symmetry breaking through a dynamic mode of antiferromagnetic moment excitations.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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