tJ{sub z} ladder: Densitymatrix renormalization group and series expansion calculations of the phase diagram
Abstract
The phase diagram of the twoleg tJ{sub z} ladder is explored, using the densitymatrix renormalization group method. Results are obtained for energy gaps, electron density profiles, and correlation functions for the half filled and quarter filled cases. The effective Lagrangian velocity parameter v{sub {rho}} is shown to vanish at half filling. The behavior of the onehole gap in the Nagaoka limit is investigated, and found to disagree with theoretical predictions. A tentative phase diagram is presented, which is quite similar to the full tJ ladder, but scaled up by a factor of about 2 in coupling. Near half filling a LutherEmery phase is found, which may be expected to show superconducting correlations, while near quarter filling the system appears to be in a TomonagaLuttinger phase.
 Authors:
 School of Physics, University of New South Wales, Sydney, NSW 2052 (Australia)
 Publication Date:
 OSTI Identifier:
 20788061
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 73; Journal Issue: 14; Other Information: DOI: 10.1103/PhysRevB.73.144508; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CORRELATION FUNCTIONS; CORRELATIONS; COUPLING; DENSITY MATRIX; ELECTRON DENSITY; ENERGY GAP; HOLES; LAGRANGIAN FUNCTION; MATHEMATICAL MODELS; PHASE DIAGRAMS; RENORMALIZATION; SERIES EXPANSION; VELOCITY
Citation Formats
Weisse, A., Bursill, R. J., Hamer, C. J., and Weihong, Zheng. tJ{sub z} ladder: Densitymatrix renormalization group and series expansion calculations of the phase diagram. United States: N. p., 2006.
Web. doi:10.1103/PHYSREVB.73.1.
Weisse, A., Bursill, R. J., Hamer, C. J., & Weihong, Zheng. tJ{sub z} ladder: Densitymatrix renormalization group and series expansion calculations of the phase diagram. United States. doi:10.1103/PHYSREVB.73.1.
Weisse, A., Bursill, R. J., Hamer, C. J., and Weihong, Zheng. Sat .
"tJ{sub z} ladder: Densitymatrix renormalization group and series expansion calculations of the phase diagram". United States.
doi:10.1103/PHYSREVB.73.1.
@article{osti_20788061,
title = {tJ{sub z} ladder: Densitymatrix renormalization group and series expansion calculations of the phase diagram},
author = {Weisse, A. and Bursill, R. J. and Hamer, C. J. and Weihong, Zheng},
abstractNote = {The phase diagram of the twoleg tJ{sub z} ladder is explored, using the densitymatrix renormalization group method. Results are obtained for energy gaps, electron density profiles, and correlation functions for the half filled and quarter filled cases. The effective Lagrangian velocity parameter v{sub {rho}} is shown to vanish at half filling. The behavior of the onehole gap in the Nagaoka limit is investigated, and found to disagree with theoretical predictions. A tentative phase diagram is presented, which is quite similar to the full tJ ladder, but scaled up by a factor of about 2 in coupling. Near half filling a LutherEmery phase is found, which may be expected to show superconducting correlations, while near quarter filling the system appears to be in a TomonagaLuttinger phase.},
doi = {10.1103/PHYSREVB.73.1},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 14,
volume = 73,
place = {United States},
year = {Sat Apr 01 00:00:00 EST 2006},
month = {Sat Apr 01 00:00:00 EST 2006}
}

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