Dynamical mean field theory equations on nearly real frequency axis
The iterated perturbation theory (IPT) equations of the dynamical mean field theory (DMFT) for the half-filled Hubbard model are solved on nearly real frequencies at various values of the Hubbard parameters, U, to investigate the nature of metal–insulator transition (MIT) at finite temperatures. Thi...
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| Veröffentlicht in: | Physica. B, Condensed matter Condensed matter, 2010-03, Vol.405 (6), p.1658-1661 |
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| container_title | Physica. B, Condensed matter |
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| creator | Fathi, M.B. Jafari, S.A. |
| description | The iterated perturbation theory (IPT) equations of the dynamical mean field theory (DMFT) for the half-filled Hubbard model are solved on nearly real frequencies at various values of the Hubbard parameters,
U, to investigate the nature of metal–insulator transition (MIT) at finite temperatures. This method avoids the instabilities associated with the infamous Padé analytic continuation and reveals fine structures across the MIT at finite temperatures, which cannot be captured by conventional methods for solving DMFT-IPT equations on Matsubara frequencies. Our method suggests that at finite temperatures, there is a crossover from a
bad metal to a
bad insulator in which the height of the quasi-particle (Kondo) peak decreases to a non-zero small bump, which gradually suppresses as one moves deeper into the
bad insulating regime. |
| doi_str_mv | 10.1016/j.physb.2009.12.063 |
| format | Article |
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U, to investigate the nature of metal–insulator transition (MIT) at finite temperatures. This method avoids the instabilities associated with the infamous Padé analytic continuation and reveals fine structures across the MIT at finite temperatures, which cannot be captured by conventional methods for solving DMFT-IPT equations on Matsubara frequencies. Our method suggests that at finite temperatures, there is a crossover from a
bad metal to a
bad insulator in which the height of the quasi-particle (Kondo) peak decreases to a non-zero small bump, which gradually suppresses as one moves deeper into the
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U, to investigate the nature of metal–insulator transition (MIT) at finite temperatures. This method avoids the instabilities associated with the infamous Padé analytic continuation and reveals fine structures across the MIT at finite temperatures, which cannot be captured by conventional methods for solving DMFT-IPT equations on Matsubara frequencies. Our method suggests that at finite temperatures, there is a crossover from a
bad metal to a
bad insulator in which the height of the quasi-particle (Kondo) peak decreases to a non-zero small bump, which gradually suppresses as one moves deeper into the
bad insulating regime.</description><subject>Analytical continuation</subject><subject>Condensed matter</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Diagrammatic</subject><subject>DMFT</subject><subject>Electron states</subject><subject>Exact sciences and technology</subject><subject>Field theory</subject><subject>Fine structure</subject><subject>Insulators</subject><subject>IPT</subject><subject>Mathematical analysis</subject><subject>Mathematical models</subject><subject>Metal-insulator transition</subject><subject>Metal-insulator transitions and other electronic transitions</subject><subject>Methods of electronic structure calculations</subject><subject>Physics</subject><subject>Uranium</subject><issn>0921-4526</issn><issn>1873-2135</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNp9kD1PwzAQhi0EEuXjF7BkQUwJPjuJm4EBlU-pEgvM1sU5q67yUewUkX-PSytGbrnhnrvT-zB2BTwDDuXtOtusplBngvMqA5HxUh6xGcyVTAXI4pjNeCUgzQtRnrKzENY8FiiYscXD1GPnDLZJR9gn1lHbJOOKBj8l9LnF0Q19SIY-6Ql9OyWeImp9HFFvpgS_XbhgJxbbQJeHfs4-nh7fFy_p8u35dXG_TE0OfEwrO5cVSmFzAGogR15LiTkY5BKbytaVNIiqqnkzt6RqVWKphCkUFFxQzHLObvZ3N36I78OoOxcMtS32NGyDVoVUUs5zEUm5J40fQvBk9ca7Dv2kgeudMb3Wv8b0zpgGoaOxuHV9uI8hCrEee-PC36qQvCggzyN3t-cohv1y5HUwLtqgxnkyo24G9--fH0LJgo4</recordid><startdate>20100315</startdate><enddate>20100315</enddate><creator>Fathi, M.B.</creator><creator>Jafari, S.A.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20100315</creationdate><title>Dynamical mean field theory equations on nearly real frequency axis</title><author>Fathi, M.B. ; Jafari, S.A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c410t-9f839a32f411ed14a0b33a41ca03ad9fb93caa79b0d8fe7b76a672c571502e873</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Analytical continuation</topic><topic>Condensed matter</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Diagrammatic</topic><topic>DMFT</topic><topic>Electron states</topic><topic>Exact sciences and technology</topic><topic>Field theory</topic><topic>Fine structure</topic><topic>Insulators</topic><topic>IPT</topic><topic>Mathematical analysis</topic><topic>Mathematical models</topic><topic>Metal-insulator transition</topic><topic>Metal-insulator transitions and other electronic transitions</topic><topic>Methods of electronic structure calculations</topic><topic>Physics</topic><topic>Uranium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Fathi, M.B.</creatorcontrib><creatorcontrib>Jafari, S.A.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physica. B, Condensed matter</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Fathi, M.B.</au><au>Jafari, S.A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dynamical mean field theory equations on nearly real frequency axis</atitle><jtitle>Physica. B, Condensed matter</jtitle><date>2010-03-15</date><risdate>2010</risdate><volume>405</volume><issue>6</issue><spage>1658</spage><epage>1661</epage><pages>1658-1661</pages><issn>0921-4526</issn><eissn>1873-2135</eissn><abstract>The iterated perturbation theory (IPT) equations of the dynamical mean field theory (DMFT) for the half-filled Hubbard model are solved on nearly real frequencies at various values of the Hubbard parameters,
U, to investigate the nature of metal–insulator transition (MIT) at finite temperatures. This method avoids the instabilities associated with the infamous Padé analytic continuation and reveals fine structures across the MIT at finite temperatures, which cannot be captured by conventional methods for solving DMFT-IPT equations on Matsubara frequencies. Our method suggests that at finite temperatures, there is a crossover from a
bad metal to a
bad insulator in which the height of the quasi-particle (Kondo) peak decreases to a non-zero small bump, which gradually suppresses as one moves deeper into the
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| ispartof | Physica. B, Condensed matter, 2010-03, Vol.405 (6), p.1658-1661 |
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| subjects | Analytical continuation Condensed matter Condensed matter: electronic structure, electrical, magnetic, and optical properties Diagrammatic DMFT Electron states Exact sciences and technology Field theory Fine structure Insulators IPT Mathematical analysis Mathematical models Metal-insulator transition Metal-insulator transitions and other electronic transitions Methods of electronic structure calculations Physics Uranium |
| title | Dynamical mean field theory equations on nearly real frequency axis |
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