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Controlling T c through Band Structure and Correlation Engineering in Collapsed and Uncollapsed Phases of Iron Arsenides

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Controlling T c through Band Structure and Correlation Engineering in Collapsed and Uncollapsed Phases of Iron Arsenides. / Acharya, Swagata; Pashov, Dimitar; Jamet, Francois; Van Schilfgaarde, Mark.

In: Physical Review Letters, Vol. 124, No. 23, 237001, 12.06.2020, p. 1-5.

Research output: Contribution to journalArticle

Harvard

Acharya, S, Pashov, D, Jamet, F & Van Schilfgaarde, M 2020, 'Controlling T c through Band Structure and Correlation Engineering in Collapsed and Uncollapsed Phases of Iron Arsenides', Physical Review Letters, vol. 124, no. 23, 237001, pp. 1-5. https://doi.org/10.1103/PhysRevLett.124.237001

APA

Acharya, S., Pashov, D., Jamet, F., & Van Schilfgaarde, M. (2020). Controlling T c through Band Structure and Correlation Engineering in Collapsed and Uncollapsed Phases of Iron Arsenides. Physical Review Letters, 124(23), 1-5. [237001]. https://doi.org/10.1103/PhysRevLett.124.237001

Vancouver

Acharya S, Pashov D, Jamet F, Van Schilfgaarde M. Controlling T c through Band Structure and Correlation Engineering in Collapsed and Uncollapsed Phases of Iron Arsenides. Physical Review Letters. 2020 Jun 12;124(23):1-5. 237001. https://doi.org/10.1103/PhysRevLett.124.237001

Author

Acharya, Swagata ; Pashov, Dimitar ; Jamet, Francois ; Van Schilfgaarde, Mark. / Controlling T c through Band Structure and Correlation Engineering in Collapsed and Uncollapsed Phases of Iron Arsenides. In: Physical Review Letters. 2020 ; Vol. 124, No. 23. pp. 1-5.

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@article{2a711a606d3043ca936738f2229a2770,
title = "Controlling T c through Band Structure and Correlation Engineering in Collapsed and Uncollapsed Phases of Iron Arsenides",
abstract = "Recent observations of selective emergence (suppression) of superconductivity in the uncollapsed(collapsed) tetragonal phase of LaFe2 As2 has rekindled interest in understanding what features of the bandstructure control the superconducting T c . We show that the proximity of the narrow Fe-dxy state to theFermi energy emerges as the primary factor. In the uncollapsed phase this state is at the Fermi energy, and ismost strongly correlated and a source of enhanced scattering in both single and two particle channels. Theresulting intense and broad low energy spin fluctuations suppress magnetic ordering and simultaneouslyprovide glue for Cooper pair formation. In the collapsed tetragonal phase, the dxy state is driven far belowthe Fermi energy, which suppresses the low-energy scattering and blocks superconductivity. A similarsource of broad spin excitation appears in uncollapsed and collapsed phases of CaFe2As2 . This suggestscontrolling coherence provides a way to engineer T c in unconventional superconductors primarilymediated through spin fluctuations.",
author = "Swagata Acharya and Dimitar Pashov and Francois Jamet and {Van Schilfgaarde}, Mark",
year = "2020",
month = "6",
day = "12",
doi = "10.1103/PhysRevLett.124.237001",
language = "English",
volume = "124",
pages = "1--5",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society (APS)",
number = "23",

}

RIS (suitable for import to EndNote) Download

TY - JOUR

T1 - Controlling T c through Band Structure and Correlation Engineering in Collapsed and Uncollapsed Phases of Iron Arsenides

AU - Acharya, Swagata

AU - Pashov, Dimitar

AU - Jamet, Francois

AU - Van Schilfgaarde, Mark

PY - 2020/6/12

Y1 - 2020/6/12

N2 - Recent observations of selective emergence (suppression) of superconductivity in the uncollapsed(collapsed) tetragonal phase of LaFe2 As2 has rekindled interest in understanding what features of the bandstructure control the superconducting T c . We show that the proximity of the narrow Fe-dxy state to theFermi energy emerges as the primary factor. In the uncollapsed phase this state is at the Fermi energy, and ismost strongly correlated and a source of enhanced scattering in both single and two particle channels. Theresulting intense and broad low energy spin fluctuations suppress magnetic ordering and simultaneouslyprovide glue for Cooper pair formation. In the collapsed tetragonal phase, the dxy state is driven far belowthe Fermi energy, which suppresses the low-energy scattering and blocks superconductivity. A similarsource of broad spin excitation appears in uncollapsed and collapsed phases of CaFe2As2 . This suggestscontrolling coherence provides a way to engineer T c in unconventional superconductors primarilymediated through spin fluctuations.

AB - Recent observations of selective emergence (suppression) of superconductivity in the uncollapsed(collapsed) tetragonal phase of LaFe2 As2 has rekindled interest in understanding what features of the bandstructure control the superconducting T c . We show that the proximity of the narrow Fe-dxy state to theFermi energy emerges as the primary factor. In the uncollapsed phase this state is at the Fermi energy, and ismost strongly correlated and a source of enhanced scattering in both single and two particle channels. Theresulting intense and broad low energy spin fluctuations suppress magnetic ordering and simultaneouslyprovide glue for Cooper pair formation. In the collapsed tetragonal phase, the dxy state is driven far belowthe Fermi energy, which suppresses the low-energy scattering and blocks superconductivity. A similarsource of broad spin excitation appears in uncollapsed and collapsed phases of CaFe2As2 . This suggestscontrolling coherence provides a way to engineer T c in unconventional superconductors primarilymediated through spin fluctuations.

UR - http://www.scopus.com/inward/record.url?scp=85087174718&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.124.237001

DO - 10.1103/PhysRevLett.124.237001

M3 - Article

VL - 124

SP - 1

EP - 5

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 23

M1 - 237001

ER -

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