Low-energy excitations in a new 2D quantum phase
Spin-nematic quantum ground states are intensely studied theoretically. LiCuVO4 is a quasi-onedimensional spin 1/2 ferromagnet with antiferromagnetic next-nearest neighbour interactions, and frustrated interchain interactions. It displays a high-field phase with short-range dipolar order in all reciprocal space directions, very anisotropic correlation lengths (70:700:3 spins in a-b-c direction) and a 2d-XY like heat capacity anomaly upon entering this phase. We suspect this phase to be of a new 2d-nematic type, not yet considered. We wish to test precise theoretical predictions for the low-energy spectrum of 2d-nematic (versus spin-density wave) phases, in particular the phason dispersion and intensity around k=kic and k=0 in the 2d-plane. We therefore ask for 7 days on IN12 equipped with 15T magnet and dilution insert.
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ENDERLE Mechthild; FAK Bjorn; SCHMALZL Karin and SCHMIDT Wolfgang F. (2015). Low-energy excitations in a new 2D quantum phase. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1329
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