Quantum criticality in an ising chain: Experimental evidence for emergent e8 symmetry

Science

Volumn 327, Issue 5962, 2010, Pages 177-180

  Coldea, R ^a   Tennant, D A ^b   Wheeler, E M ^a,b   Wawrzynska, E ^c   Prabhakaran, D ^a   Telling, M ^d   Habicht, K ^b   Smeibidl, P ^b   Kiefer, K ^b  

^a UNIVERSITY OF OXFORD   (United Kingdom)

^b HAHN MEITNER INSTITUT   (Germany)

^c UNIVERSITY OF BRISTOL   (United Kingdom)

^d RUTHERFORD APPLETON LABORATORY   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

COBALT NIOBATE; FERROMAGNETIC MATERIAL; NIOBIUM; UNCLASSIFIED DRUG;

EXPERIMENTAL STUDY; PHASE TRANSITION; QUANTUM MECHANICS; SYMMETRY;

ARTICLE; ELECTRON SPIN RESONANCE; PRIORITY JOURNAL; QUANTUM MECHANICS; SPECTROSCOPY;

EID: 74249089987     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.1180085     Document Type: Article

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24. 8 are expected to produce much smaller features in the total scattering line shape, as they carry a much reduced weight and are overlapping or are very close to the lower-boundary onset of the continuum scattering (see Fig. 4E).
25. 1 depends on the interchain wave vector q⊥, as the data in Fig. 4D were collected slightly away from the 3D Bragg peak positions; the already good agreement with the long-wavelength prediction expected to be valid near the 3D Bragg wave vector may suggest that the mass ratio dispersion is probably a small effect at the measured wave vectors.
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28. We thank G. Mussardo, S. T. Carr, A. M. Tsvelik, M. Greiter, and in particular F. H. L. Essler and L. Balents for very useful discussions. Work at Oxford, Bristol, and ISIS was supported by the Engineering and Physical Sciences Research Council (UK) and at HZB by the European Commission under the 6th Framework Programme through the Key Action: Strengthening the European Research Area, Research Infrastructures, contract RII3-CT-2003-505925 (NMI3).