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 - 1987/1/1
Y1 - 1987/1/1
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.
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U2 - 10.1103/PhysRevLett.58.1035
DO - 10.1103/PhysRevLett.58.1035
M3 - Article
C2 - 10034315
AN - SCOPUS:0000269764
SN - 0031-9007
VL - 58
SP - 1035
EP - 1037
JO - Physical review letters
JF - Physical review letters
IS - 10
ER -