The Effects of Pressure on the Structural, Electronic, and Lattice Dynamical Properties of FeSe Superconductor
Motivated by the experimental huge enhancement of the superconducting transition temperature T c in FeSe superconductor under high pressure, we perform first-principles calculations of the evolutions of structural, electronic, and lattice dynamical properties of FeSe at varying hydrostatic pressures...
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Veröffentlicht in: | Journal of low temperature physics 2015-03, Vol.178 (5-6), p.355-366 |
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creator | Lu, Hong-Yan Wang, Ni-Na Wei, Meng-Jun Chen, San Yang, Yang Shao, Ding-Fu Lu, Wen-Jian |
description | Motivated by the experimental huge enhancement of the superconducting transition temperature
T
c
in FeSe superconductor under high pressure, we perform first-principles calculations of the evolutions of structural, electronic, and lattice dynamical properties of FeSe at varying hydrostatic pressures up to 8 GPa. The pressure response is anisotropic with a larger compressibility along
c
-axis. At ambient pressure, Fermi surface nesting between hole and electron pockets induces spin density wave (SDW) order at the vector (
π
,
π
, 0) with a collinear antiferromagnetic structure. With the increase of pressure, the Fermi surface nesting is reduced, and therefore the SDW is suppressed, which could not enhance superconductivity based on the spin-fluctuation scenario. For the phonon dispersion, the bands have blue-shift except for the modes around 100 cm
-
1
, indicating hardening of the vibration modes in a wide frequency range. Furthermore, the electron–phonon coupling constant and the corresponding
T
c
by McMillan equation are calculated. However, there is no obvious enhancement of
T
c
under pressure, which further rules out the conventional phonon-mediated superconductivity of FeSe. Maybe the local magnetic moment plays an important role for the superconductivity and enhancement of
T
c
under pressure. |
doi_str_mv | 10.1007/s10909-014-1253-y |
format | Article |
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T
c
in FeSe superconductor under high pressure, we perform first-principles calculations of the evolutions of structural, electronic, and lattice dynamical properties of FeSe at varying hydrostatic pressures up to 8 GPa. The pressure response is anisotropic with a larger compressibility along
c
-axis. At ambient pressure, Fermi surface nesting between hole and electron pockets induces spin density wave (SDW) order at the vector (
π
,
π
, 0) with a collinear antiferromagnetic structure. With the increase of pressure, the Fermi surface nesting is reduced, and therefore the SDW is suppressed, which could not enhance superconductivity based on the spin-fluctuation scenario. For the phonon dispersion, the bands have blue-shift except for the modes around 100 cm
-
1
, indicating hardening of the vibration modes in a wide frequency range. Furthermore, the electron–phonon coupling constant and the corresponding
T
c
by McMillan equation are calculated. However, there is no obvious enhancement of
T
c
under pressure, which further rules out the conventional phonon-mediated superconductivity of FeSe. Maybe the local magnetic moment plays an important role for the superconductivity and enhancement of
T
c
under pressure.</description><identifier>ISSN: 0022-2291</identifier><identifier>EISSN: 1573-7357</identifier><identifier>DOI: 10.1007/s10909-014-1253-y</identifier><language>eng</language><publisher>Boston: Springer US</publisher><subject>Characterization and Evaluation of Materials ; Condensed Matter Physics ; Electronics ; Fermi surfaces ; Lattices ; Low temperature physics ; Magnetic Materials ; Magnetism ; Mathematical analysis ; Nesting ; Physics ; Physics and Astronomy ; Superconductivity ; Superconductors ; Vibration mode</subject><ispartof>Journal of low temperature physics, 2015-03, Vol.178 (5-6), p.355-366</ispartof><rights>Springer Science+Business Media New York 2014</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c321t-7e756b69ab12c50c990ac497da168b8c19e45231045ab50b3a5c6e432f54f9743</citedby><cites>FETCH-LOGICAL-c321t-7e756b69ab12c50c990ac497da168b8c19e45231045ab50b3a5c6e432f54f9743</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10909-014-1253-y$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10909-014-1253-y$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Lu, Hong-Yan</creatorcontrib><creatorcontrib>Wang, Ni-Na</creatorcontrib><creatorcontrib>Wei, Meng-Jun</creatorcontrib><creatorcontrib>Chen, San</creatorcontrib><creatorcontrib>Yang, Yang</creatorcontrib><creatorcontrib>Shao, Ding-Fu</creatorcontrib><creatorcontrib>Lu, Wen-Jian</creatorcontrib><title>The Effects of Pressure on the Structural, Electronic, and Lattice Dynamical Properties of FeSe Superconductor</title><title>Journal of low temperature physics</title><addtitle>J Low Temp Phys</addtitle><description>Motivated by the experimental huge enhancement of the superconducting transition temperature
T
c
in FeSe superconductor under high pressure, we perform first-principles calculations of the evolutions of structural, electronic, and lattice dynamical properties of FeSe at varying hydrostatic pressures up to 8 GPa. The pressure response is anisotropic with a larger compressibility along
c
-axis. At ambient pressure, Fermi surface nesting between hole and electron pockets induces spin density wave (SDW) order at the vector (
π
,
π
, 0) with a collinear antiferromagnetic structure. With the increase of pressure, the Fermi surface nesting is reduced, and therefore the SDW is suppressed, which could not enhance superconductivity based on the spin-fluctuation scenario. For the phonon dispersion, the bands have blue-shift except for the modes around 100 cm
-
1
, indicating hardening of the vibration modes in a wide frequency range. Furthermore, the electron–phonon coupling constant and the corresponding
T
c
by McMillan equation are calculated. However, there is no obvious enhancement of
T
c
under pressure, which further rules out the conventional phonon-mediated superconductivity of FeSe. Maybe the local magnetic moment plays an important role for the superconductivity and enhancement of
T
c
under pressure.</description><subject>Characterization and Evaluation of Materials</subject><subject>Condensed Matter Physics</subject><subject>Electronics</subject><subject>Fermi surfaces</subject><subject>Lattices</subject><subject>Low temperature physics</subject><subject>Magnetic Materials</subject><subject>Magnetism</subject><subject>Mathematical analysis</subject><subject>Nesting</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Superconductivity</subject><subject>Superconductors</subject><subject>Vibration mode</subject><issn>0022-2291</issn><issn>1573-7357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNp9kD1PwzAQhi0EEqXwA9g8MjTgjziOR1RaQKoEUstsOe4FUqV2sZ2h_x6XMDOddPc-j3QvQreU3FNC5EOkRBFVEFoWlAleHM_QhArJC8mFPEcTQhgrGFP0El3FuCOEqLriE-Q2X4AXbQs2Rexb_B4gxiEA9g6nfFqnMNg0BNPP8KLPqeBdZ2fYuC1emZQ6C_jp6My-s6bPtD9ASB38upawzoIhb6x326zx4RpdtKaPcPM3p-hjudjMX4rV2_Pr_HFVWM5oKiRIUTWVMg1lVhCrFDG2VHJraFU3taUKSsE4JaUwjSANN8JWUHLWirJVsuRTdDd6D8F_DxCT3nfRQt8bB36ImlaVqqXi4hSlY9QGH2OAVh9CtzfhqCnRp2712K3O3epTt_qYGTYyMWfdJwS980Nw-aN_oB8csX0R</recordid><startdate>20150301</startdate><enddate>20150301</enddate><creator>Lu, Hong-Yan</creator><creator>Wang, Ni-Na</creator><creator>Wei, Meng-Jun</creator><creator>Chen, San</creator><creator>Yang, Yang</creator><creator>Shao, Ding-Fu</creator><creator>Lu, Wen-Jian</creator><general>Springer US</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20150301</creationdate><title>The Effects of Pressure on the Structural, Electronic, and Lattice Dynamical Properties of FeSe Superconductor</title><author>Lu, Hong-Yan ; Wang, Ni-Na ; Wei, Meng-Jun ; Chen, San ; Yang, Yang ; Shao, Ding-Fu ; Lu, Wen-Jian</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c321t-7e756b69ab12c50c990ac497da168b8c19e45231045ab50b3a5c6e432f54f9743</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Characterization and Evaluation of Materials</topic><topic>Condensed Matter Physics</topic><topic>Electronics</topic><topic>Fermi surfaces</topic><topic>Lattices</topic><topic>Low temperature physics</topic><topic>Magnetic Materials</topic><topic>Magnetism</topic><topic>Mathematical analysis</topic><topic>Nesting</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Superconductivity</topic><topic>Superconductors</topic><topic>Vibration mode</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lu, Hong-Yan</creatorcontrib><creatorcontrib>Wang, Ni-Na</creatorcontrib><creatorcontrib>Wei, Meng-Jun</creatorcontrib><creatorcontrib>Chen, San</creatorcontrib><creatorcontrib>Yang, Yang</creatorcontrib><creatorcontrib>Shao, Ding-Fu</creatorcontrib><creatorcontrib>Lu, Wen-Jian</creatorcontrib><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of low temperature physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lu, Hong-Yan</au><au>Wang, Ni-Na</au><au>Wei, Meng-Jun</au><au>Chen, San</au><au>Yang, Yang</au><au>Shao, Ding-Fu</au><au>Lu, Wen-Jian</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Effects of Pressure on the Structural, Electronic, and Lattice Dynamical Properties of FeSe Superconductor</atitle><jtitle>Journal of low temperature physics</jtitle><stitle>J Low Temp Phys</stitle><date>2015-03-01</date><risdate>2015</risdate><volume>178</volume><issue>5-6</issue><spage>355</spage><epage>366</epage><pages>355-366</pages><issn>0022-2291</issn><eissn>1573-7357</eissn><abstract>Motivated by the experimental huge enhancement of the superconducting transition temperature
T
c
in FeSe superconductor under high pressure, we perform first-principles calculations of the evolutions of structural, electronic, and lattice dynamical properties of FeSe at varying hydrostatic pressures up to 8 GPa. The pressure response is anisotropic with a larger compressibility along
c
-axis. At ambient pressure, Fermi surface nesting between hole and electron pockets induces spin density wave (SDW) order at the vector (
π
,
π
, 0) with a collinear antiferromagnetic structure. With the increase of pressure, the Fermi surface nesting is reduced, and therefore the SDW is suppressed, which could not enhance superconductivity based on the spin-fluctuation scenario. For the phonon dispersion, the bands have blue-shift except for the modes around 100 cm
-
1
, indicating hardening of the vibration modes in a wide frequency range. Furthermore, the electron–phonon coupling constant and the corresponding
T
c
by McMillan equation are calculated. However, there is no obvious enhancement of
T
c
under pressure, which further rules out the conventional phonon-mediated superconductivity of FeSe. Maybe the local magnetic moment plays an important role for the superconductivity and enhancement of
T
c
under pressure.</abstract><cop>Boston</cop><pub>Springer US</pub><doi>10.1007/s10909-014-1253-y</doi><tpages>12</tpages></addata></record> |
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subjects | Characterization and Evaluation of Materials Condensed Matter Physics Electronics Fermi surfaces Lattices Low temperature physics Magnetic Materials Magnetism Mathematical analysis Nesting Physics Physics and Astronomy Superconductivity Superconductors Vibration mode |
title | The Effects of Pressure on the Structural, Electronic, and Lattice Dynamical Properties of FeSe Superconductor |
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