Abstract
We made use of a special algorithm for compute unified device architecture for NVIDIA graphics cards, a nonlinear conjugate-gradient method to minimize energy functional, and Monte-Carlo technique to directly observe the forming of the ground state configuration for the 2D hard-core bosons by lowering the temperature and its evolution with deviation away from half-filling. The novel technique allowed us to examine earlier implications and uncover novel features of the phase transitions, in particular, look upon the nucleation of the odd domain structure, emergence of filamentary superfluidity nucleated at the antiphase domain walls of the charge-ordered phase, and nucleation and evolution of different topological structures.
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Notes
The term “filamentary superfluidity” is a full analogue of a more familiar term “filamentary superconductivity”. Here, in the paper, “filamentary superfluidity” is related with an antiphase domain wall (the wall between two CO domains) which is characterized by a nonzero superfluid order parameter.
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Acknowledgments
The research was supported by Act 211 Government of the RF, agreement 02.A03.21.0006 and by the Ministry of Education and Science of the RF, projects 1437 and 2725.
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Panov, Y.D., Moskvin, A.S., Rybakov, F.N. et al. Unusual Domain Structure and Filamentary Superfluidity for 2D Hard-Core Bosons in Insulating Charge-Ordered Phase. J Low Temp Phys 185, 488–494 (2016). https://doi.org/10.1007/s10909-016-1504-1
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DOI: https://doi.org/10.1007/s10909-016-1504-1