Electronically driven instabilities and superconductivity in the layered La2-xBaxCuO4 perovskites

Jaejun Yu, Arthur J Freeman, J. H. Xu

Research output: Contribution to journalArticle

511 Citations (Scopus)

Abstract

Body-centered tetragonal La2CuO4 is shown to have its electronic structure and properties dominated by the layered in-plane Cu-3dO-2p interactions. A strong Fermi surface instability along [110] with q=2kF leads, via a soft-phonon mode, to the observed orthorhombic phase and accounts for its semiconducting properties. The addition of divalent metals, i.e., Ba, Sr, suppresses the instability and stabilizes the tetragonal phase where the same soft-phonon branch apparently contributes to a large electron-phonon interaction and a high Tc.

Original languageEnglish
Pages (from-to)1035-1037
Number of pages3
JournalPhysical Review Letters
Volume58
Issue number10
DOIs
Publication statusPublished - 1987

Fingerprint

perovskites
superconductivity
electron phonon interactions
Fermi surfaces
electronic structure
metals
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electronically driven instabilities and superconductivity in the layered La2-xBaxCuO4 perovskites. / Yu, Jaejun; Freeman, Arthur J; Xu, J. H.

In: Physical Review Letters, Vol. 58, No. 10, 1987, p. 1035-1037.

Research output: Contribution to journalArticle

@article{426a4bb794074fe1b4a66d6b02ee8f19,
title = "Electronically driven instabilities and superconductivity in the layered La2-xBaxCuO4 perovskites",
abstract = "Body-centered tetragonal La2CuO4 is shown to have its electronic structure and properties dominated by the layered in-plane Cu-3dO-2p interactions. A strong Fermi surface instability along [110] with q=2kF leads, via a soft-phonon mode, to the observed orthorhombic phase and accounts for its semiconducting properties. The addition of divalent metals, i.e., Ba, Sr, suppresses the instability and stabilizes the tetragonal phase where the same soft-phonon branch apparently contributes to a large electron-phonon interaction and a high Tc.",
author = "Jaejun Yu and Freeman, {Arthur J} and Xu, {J. H.}",
year = "1987",
doi = "10.1103/PhysRevLett.58.1035",
language = "English",
volume = "58",
pages = "1035--1037",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "10",

}

TY - JOUR

T1 - Electronically driven instabilities and superconductivity in the layered La2-xBaxCuO4 perovskites

AU - Yu, Jaejun

AU - Freeman, Arthur J

AU - Xu, J. H.

PY - 1987

Y1 - 1987

N2 - Body-centered tetragonal La2CuO4 is shown to have its electronic structure and properties dominated by the layered in-plane Cu-3dO-2p interactions. A strong Fermi surface instability along [110] with q=2kF leads, via a soft-phonon mode, to the observed orthorhombic phase and accounts for its semiconducting properties. The addition of divalent metals, i.e., Ba, Sr, suppresses the instability and stabilizes the tetragonal phase where the same soft-phonon branch apparently contributes to a large electron-phonon interaction and a high Tc.

AB - Body-centered tetragonal La2CuO4 is shown to have its electronic structure and properties dominated by the layered in-plane Cu-3dO-2p interactions. A strong Fermi surface instability along [110] with q=2kF leads, via a soft-phonon mode, to the observed orthorhombic phase and accounts for its semiconducting properties. The addition of divalent metals, i.e., Ba, Sr, suppresses the instability and stabilizes the tetragonal phase where the same soft-phonon branch apparently contributes to a large electron-phonon interaction and a high Tc.

UR - http://www.scopus.com/inward/record.url?scp=0000269764&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000269764&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.58.1035

DO - 10.1103/PhysRevLett.58.1035

M3 - Article

VL - 58

SP - 1035

EP - 1037

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 10

ER -