Anomalous dispersion in the autocorrelation of ARPES data of Bi$_2$Sr$_2$CaCu$_2$O$_{8+delta}$
Anomalous dispersion in the autocorrelation of ARPES data of Bi$_2$Sr$_2$CaCu$_2$O$_{8+delta}$
复制标题
Bi$_2$Sr$_2$CaCu$_2$O$_{8 delta}$ ARPES 数据自相关的异常离散
DOI:
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发表时间:
2007
期刊:
影响因子:
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通讯作者:
Paul Scherrer Inst.
中科院分区:
文献类型:
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作者:
U. Chatterjee;M. Shi;A. Kaminski;A. Kanigel;H. Fretwell;Kensei Terashima;T. Takahashi;S. Rosenkranz;Z. Li;H. Raffy;A. Santander;K. Kadowaki;M. Randeria;M. Norman;J. Campuzano;Paul Scherrer Inst.
We find that peaks in the autocorrelation of angle resolved photoemission spectroscopy data of Bi$_2$Sr$_2$CaCu$_2$O$_{8+delta}$ in the superconducting state show dispersive behavior for binding energies smaller than the maximum superconducting energy gap. For higher energies, though, a striking anomalous dispersion is observed that is a consequence of the interaction of the electrons with collective excitations. In contrast, in the pseudogap phase, we only observe dispersionless behavior for the autocorrelation peaks. The implications of our findings in regards to Fourier transformed scanning tunneling spectroscopy data are discussed.