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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13503
Title: Antiferromagnetism and superconductivity in a model with extended pairing interactions
Authors: Maitra, Tulika
Beck H.
Taraphder A.
Published in: European Physical Journal B
Abstract: The competition between antiferromagnetism and the d + id superconducting state is studied in a model with near and next near neighbour interactions in the absence of any on-site repulsion. A mean field study shows that it is possible to have simultaneous occurrence of an antiferromagnetic and a singlet d + id superconducting state in this model. In addition, such a coexistence generates a triplet d + id superconducting order parameter with centre of mass momentum Q = (π, π) dynamically having the same orbital symmetry as the singlet superconductor. Inclusion of next nearest neighbour hopping in the band stabilises the dxy superconducting state away from half filling, the topology of the phase diagram, though, remains similar to the near neighbour model. In view of the very recent observation of a broad region of coexistence of antiferromagnetic and unconventional superconducting states in organic superconductors, the possibility of observation of the triplet state has been outlined.
Citation: European Physical Journal B (2001), 21(4): 527-533
URI: https://doi.org/10.1007/s100510170163
http://repository.iitr.ac.in/handle/123456789/13503
Issue Date: 2001
Keywords: 74.20.-z Theories and models of superconducting state
74.72.-h High-Tc compounds
ISSN: 14346028
Author Scopus IDs: 7004183343
57217550087
6602698909
Author Affiliations: Maitra, T., Dept. of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721302, India
Beck, H., University of Neuchâtel, rue de Breguet 1, 2000 Neuchâtel, Switzerland
Taraphder, A., Dept. of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721302, India, Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721302, India
Corresponding Author: Maitra, T.; Dept. of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721302, India; email: tulika@phy.iitkgp.ernet.in
Appears in Collections:Journal Publications [PH]

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