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  Strong-coupling electron-phonon superconductivity in noncentrosymmetric quasi-one-dimensional K2Cr3As3

Subedi, A. (2015). Strong-coupling electron-phonon superconductivity in noncentrosymmetric quasi-one-dimensional K2Cr3As3. Physical Review B, 92(17): 174501. doi:10.1103/PhysRevB.92.174501.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-2D14-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-2D15-5
Genre: Journal Article

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PhysRevB.92.174501.pdf (Publisher version), 470KB
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PhysRevB.92.174501.pdf
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2015
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© American Physical Society
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http://dx.doi.org/10.1103/PhysRevB.92.174501 (Publisher version)
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http://arxiv.org/abs/1508.00825 (Preprint)
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 Creators:
Subedi, Alaska1, Author              
Affiliations:
1Theory of Complex Materials, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074318              

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Free keywords: Condensed Matter; Superconductivity; PACS number: 74.25.Kc
 Abstract: I study the lattice dynamics and electron-phonon coupling in noncentrosymmetric quasi-one-dimensional K2Cr3As3 using density functional theory based first principles calculations. The phonon dispersions show stable phonons without any soft-mode behavior. They also exhibit features that point to a strong interaction of K atoms with the lattice. I find that the calculated Eliashberg spectral function shows a large enhancement around 50 cm−1. The phonon modes that show large coupling involve in-plane motions of all three species of atoms. The q dependent electron-phonon coupling decreases strongly away from the qz=0 plane. The total electron-phonon coupling is large, with a value of λep=3.0, which readily explains the experimentally observed large mass enhancement.

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Language(s): eng - English
 Dates: 2015-09-302015-08-042015-11-022015-11-01
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevB.92.174501
arXiv: 1508.00825
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 92 (17) Sequence Number: 174501 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008