{"id":146,"date":"2016-04-18T21:47:07","date_gmt":"2016-04-18T21:47:07","guid":{"rendered":"http:\/\/cgisvr.physics.rutgers.edu\/user-html\/blumberg\/?p=146"},"modified":"2018-09-13T19:33:50","modified_gmt":"2018-09-13T19:33:50","slug":"chirality-density-wave-of-the-hidden-order-phase-in-uru2si2","status":"publish","type":"post","link":"https:\/\/girsh.rutgers.edu\/index.php\/2016\/04\/18\/chirality-density-wave-of-the-hidden-order-phase-in-uru2si2\/","title":{"rendered":"Chirality density wave of the \u2018hidden order\u2019 phase in URu2Si2"},"content":{"rendered":"

\"150212154625_1_540x360\" Authors:<\/strong>\u00a0H.-H. Kung, R. E. Baumbach, E. D. Bauer, V. K. Thorsm\u00f8lle, W.-L. Zhang, K. Haule, J. A. Mydosh, G. Blumberg<\/p>\n

Abstract:<\/strong> A second-order phase transition in a physical system is associated with the emergence of an \u201corder parameter\u201d and a spontaneous symmetry breaking. The heavy fermion superconductor URu2<\/sub>Si2<\/sub> has a \u201chidden order\u201d (HO) phase below the temperature of 17.5 kelvin; the symmetry of the associated order parameter has remained ambiguous. Here we use polarization-resolved Raman spectroscopy to specify the symmetry of the low-energy excitations above and below the HO transition. We determine that the HO parameter breaks local vertical and diagonal reflection symmetries at the uranium sites, resulting in crystal field states with distinct chiral properties, which order to a commensurate chirality density wave ground state.<\/p>\n