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  Ground-state phase diagram of the one-dimensional t−J model with pair hopping terms

Coulthard, J. R., Clark, S. R., & Jaksch, D. (2018). Ground-state phase diagram of the one-dimensional t−J model with pair hopping terms. Physical Review B, 98(3): 035116. doi:10.1103/PhysRevB.98.035116.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-DCD8-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-501C-5
Genre: Journal Article

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https://dx.doi.org/10.1103/PhysRevB.98.035116 (Publisher version)
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 Creators:
Coulthard, J. R.1, Author
Clark, S. R.2, 3, Author              
Jaksch, D.1, 4, Author
Affiliations:
1Clarendon Laboratory, University of Oxford, ou_persistent22              
2Department of Physics, University of Bath, ou_persistent22              
3Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
4Centre for Quantum Technologies, National University of Singapore, ou_persistent22              

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 Abstract: The t−J model is a standard model of strongly correlated electrons, often studied in the context of high-Tc superconductivity. However, most studies of this model neglect three-site terms, which appear at the same order as the superexchange J. As these terms correspond to pair hopping, they are expected to play an important role in the physics of superconductivity when doped sufficiently far from half filling. We present a density matrix renormalization-group study of the one-dimensional t−J model with the pair hopping terms included. We demonstrate that these additional terms radically change the one-dimensional ground-state phase diagram, extending the superconducting region at low fillings, while at larger fillings, superconductivity is completely suppressed. We explain this effect by introducing a simplified effective model of repulsive hardcore bosons.

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Language(s): eng - English
 Dates: 2018-06-282018-04-272018-07-132018-07-13
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevB.98.035116
arXiv: 1804.09197
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Project name : This research is funded by the European Research Coun- cil under the European Union’s Seventh Framework Pro- gramme (FP7/2007–2013)/ERC Grant Agreement No. 319286 Q-MAC. D.J. acknowledges support from the EPSRC under Grants No. EP/K038311/1 and No. EP/P009565/1. S.R.C. gratefully acknowledges support from the EPSRC under Grant No. EP/P025110/1.
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 98 (3) Sequence Number: 035116 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008