Publication: Anomalous asymmetry in the Fermi surface of the high-temperature superconductor YBa2Cu4O8 revealed by angle-resolved photoemission spectroscopy
Anomalous asymmetry in the Fermi surface of the high-temperature superconductor YBa2Cu4O8 revealed by angle-resolved photoemission spectroscopy
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Takeshi, K., Khasanov, R., Sassa, Y., Bendounan, A., Pailhés, S., Chang, J., Mesot, J., Keller, H., Zhigadlo, N. D., Shi, M., Bukowski, Z., Karpinski, Z., & Kaminski, A. (2009). Anomalous asymmetry in the Fermi surface of the high-temperature superconductor YBa2Cu4O8 revealed by angle-resolved photoemission spectroscopy. Physical Review. B, Condensed Matter and Materials Physics, 80(10), 100505. https://doi.org/10.1103/PhysRevB.80.100505
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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 asymmetr
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- Khasanov, R
- Sassa, Y
- Bendounan, A
- Pailhés, S
- Chang, J
- Mesot, J
- Keller, H
- Zhigadlo, N D
- Shi, M
- Bukowski, Z
- Kaminski, A
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Takeshi, K., Khasanov, R., Sassa, Y., Bendounan, A., Pailhés, S., Chang, J., Mesot, J., Keller, H., Zhigadlo, N. D., Shi, M., Bukowski, Z., Karpinski, Z., & Kaminski, A. (2009). Anomalous asymmetry in the Fermi surface of the high-temperature superconductor YBa2Cu4O8 revealed by angle-resolved photoemission spectroscopy. Physical Review. B, Condensed Matter and Materials Physics, 80(10), 100505. https://doi.org/10.1103/PhysRevB.80.100505
