Effects of a collective spin resonance mode on the scanning tunneling microscopy spectra of d-wave superconductors.
A high-energy spin resonance mode is known to exist in many high-temperature superconductors. Motivated by recent scanning tunneling microscopy experiments in superconducting Bi(2)Sr(2)CaCu(2)O(8+delta), we study the effects of this resonance mode on the local density of states (LDOS). The coupling between the electrons in a d-wave superconductor and the resonance mode produces high-energy peaks in the LDOS, which displays a two-unit-cell periodic modulation around a nonmagnetic impurity. This suggests a new means to not only detect the dynamical spin collective mode but also study its coupling to electronic excitations.
Zhu
Jian-Xin
JX
Theoretical Division, MS B262, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Sun
Jun
J
Si
Qimiao
Q
Balatsky
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