Determination of the Spinon Confining Potential in a 1D spin-1/2 XXZ Antiferromagnet
SrCo2V2O8 is a quasi-one-dimensional, Spin-1/2 antiferromagnet with XXZ anisotropy. Weak interchains coupling gives rise to long-range magnetic order at a suppressed but finite temperature. A spinon continuum is observed above the Neel temperature while below TN a series of resolution-limited sharp modes are found. The modes are due to spinons bound into pairs by the interchain coupling which acts as a confining potential. The bound mode energies and intensities can be described by a new theory based on Tangent-space Matrix Product States. The description is accurate apart from a small but significant shift in the mode energies due to the interchain coupling. To understand the confining potential better as well as to achieve more accurate agreement between theory and experiment, we need to obtian the full Hamiltonian of SrCo2V2O8 including the details of the complex interchain coupling. The goal of this proposal is to measure the interchain dispersions in this compound which will be used to extract the Hamiltonian and will be included in the theoretical model as a random phase approximation.
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Bella Lake; BERA Anup Kumar; BOEHM Martin and ISLAM A T M Nazmul. (2018). Determination of the Spinon Confining Potential in a 1D spin-1/2 XXZ Antiferromagnet. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-05-696
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