On the phase diagram of the extended Hubbard model with intersite density-density interactions in the atomic limit
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- 作者：Konrad Jerzy Kapciaa ; konrad.kapcia@ifpan.edu.pl" class="auth_mail" title="E-mail the corresponding author ; Stanisław Robaszkiewiczb ; stanislaw.robaszkiewicz@amu.edu.pl" class="auth_mail" title="E-mail the corresponding author
- 关键词：Extended Hubbard model ; Atomic limit ; Charge-ordered system ; Mean-field approximation ; Phase diagram ; Multicritical behaviour
- 刊名：Physica A: Statistical Mechanics and its Applications
- 出版年：2016
- 出版时间：1 November 2016
- 年：2016
- 卷：461
- 期：Complete
- 页码：487-497
- 全文大小：1306 K
文摘
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Phase diagrams of a simple effective model for charge-order insulators are studied.
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The model includes on-site and inter-site (NN and NNN) density–density interactions.
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The phase diagrams as a function of the chemical potential are derived.
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The diagrams have complex structure with a plethora of various multicritical points.
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Obtained results are exact in the high-dimensions limit.