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Title: | Feasibility of a metamagnetic transition in correlated systems |
Authors: | Acharya, Swagata Medhi, Amal Vidhyadhiraja, N. S. Taraphder, A. |
Keywords: | Physics metamagnetism scaling behavior slave rotor Fermi-Liquid Field Superconductivity Dependence Insulator He-3 |
Issue Date: | 2016 |
Publisher: | IoP Publishing Ltd |
Citation: | Acharya, S.; Medhi, A.; Vidhyadhiraja, N. S.; Taraphder, A., Feasibility of a metamagnetic transition in correlated systems. Journal of Physics-Condensed Matter 2016, 28 (11), 8 http://dx.doi.org/10.1088/0953-8984/28/11/116001 Journal of Physics-Condensed Matter 28 11 |
Abstract: | The long-standing issue of the competition between the magnetic field and the Kondo effect, favoring, respectively, triplet and singlet ground states, is addressed using a cluster slave-rotor mean-field theory for the Hubbard model and its spin-correlated, spin-frustrated extensions in two dimensions. The metamagnetic jump is established and compared with earlier results of dynamical mean-field theory. This approach also reproduces the emergent super-exchange energy scale in the insulating side. A scaling is found for the critical Zeeman field in terms of the intrinsic coherence scale just below the metal-insulator transition, where the critical spin fluctuations are soft. The conditions required for metamagnetism to appear at a reasonable field are also underlined. Gutzwiller analysis on the two-dimensional Hubbard model and a quantum Monte Carlo calculation on the Heisenberg spin system are performed to check the limiting cases of the cluster slave-rotor results for the Hubbard model. Low-field scaling features for magnetization are discussed. |
Description: | Restricted Access |
URI: | https://libjncir.jncasr.ac.in/xmlui/10572/2279 |
ISSN: | 0953-8984 |
Appears in Collections: | Research Articles (Vidhyadhiraja N. S.) |
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