%0 Journal Article %1 Kondo2009 %A Kondo, Takeshi %A Khasanov, R. %A Sassa, Y. %A Bendounan, A. %A Pailhes, S. %A Chang, J. %A Mesot, J. %A Keller, H. %A Zhigadlo, N. D. %A Shi, M. %A Bukowski, Z. %A Karpinski, J. %A Kaminski, A. %D 2009 %I American Physical Society %J Phys. Rev. B %K imported %N 10 %P 100505 %R 10.1103/PhysRevB.80.100505 %T Anomalous asymmetry in the Fermi surface of the high-temperature superconductor $YBa_2Cu_4O_8$ revealed by angle-resolved photoemission spectroscopy %V 80 %X We use microprobe angle-resolved photoemission spectroscopy to study the Fermi surface and band dispersion of the CuO2 planes in the high-temperature superconductor, YBa2Cu4O8. We find a strong in-plane asymmetry of the electronic structure between directions along a and b axes. The saddle point of the antibonding band lies at a significantly higher energy in the a direction (π,0) than the b direction (0,π), whereas the bonding band displays the opposite behavior. We demonstrate that the abnormal band shape is due to a strong asymmetry of the bilayer band splitting, likely caused by a nontrivial hybridization between the planes and chains. This asymmetry has an important implication for interpreting key properties of the Y-Ba-Cu-O family, especially the superconducting gap, transport, and results of inelastic neutron scattering.

@article{Kondo2009, abstract = {We use microprobe angle-resolved photoemission spectroscopy to study the Fermi surface and band dispersion of the CuO2 planes in the high-temperature superconductor, YBa2Cu4O8. We find a strong in-plane asymmetry of the electronic structure between directions along a and b axes. The saddle point of the antibonding band lies at a significantly higher energy in the a direction (π,0) than the b direction (0,π), whereas the bonding band displays the opposite behavior. We demonstrate that the abnormal band shape is due to a strong asymmetry of the bilayer band splitting, likely caused by a nontrivial hybridization between the planes and chains. This asymmetry has an important implication for interpreting key properties of the Y-Ba-Cu-O family, especially the superconducting gap, transport, and results of inelastic neutron scattering.}, added-at = {2010-11-06T00:14:39.000+0100}, author = {Kondo, Takeshi and Khasanov, R. and Sassa, Y. and Bendounan, A. and Pailhes, S. and Chang, J. and Mesot, J. and Keller, H. and Zhigadlo, N. D. and Shi, M. and Bukowski, Z. and Karpinski, J. and Kaminski, A.}, biburl = {https://www.bibsonomy.org/bibtex/2774fc9c0b6bd7d203b03be0719fe41ed/nplumb}, doi = {10.1103/PhysRevB.80.100505}, file = {:C\:\\Users\\Nick\\Documents\\Papers\\Kondo et al. - Anomalous asymmetry in the Fermi surface of the high-temperature superconductor YBCO revealed by ARPES.pdf:PDF}, interhash = {961da2526b08681948ca54cf4460be3a}, intrahash = {774fc9c0b6bd7d203b03be0719fe41ed}, journal = {Phys. Rev. B}, keywords = {imported}, month = Sep, number = 10, numpages = {4}, owner = {Nick}, pages = 100505, publisher = {American Physical Society}, timestamp = {2010-11-06T00:14:42.000+0100}, title = {Anomalous asymmetry in the Fermi surface of the high-temperature superconductor $YBa_{2}Cu_{4}O_{8}$ revealed by angle-resolved photoemission spectroscopy}, volume = 80, year = 2009 }