TY - JOUR
T1 - Suppression of Superfluid Density and the Pseudogap State in the Cuprates by Impurities
AU - Erdenemunkh, Unurbat
AU - Koopman, Brian
AU - Fu, Ling
AU - Chatterjee, Kamalesh
AU - Wise, W. D.
AU - Gu, G. D.
AU - Hudson, E. W.
AU - Boyer, Michael C.
N1 - Funding Information:
We thank Bill Atkinson and Kyle Shen for useful conversations. The authors thank J.C. Davis for access to Zn and Ni doped Bi-2212 data. This work is supported by NSF Grant No. DMR-1341286 and Clark University (university and physics department research student support). The work at BNL was supported by DOE, Office of Science under DE-SC0012704.
Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/12/16
Y1 - 2016/12/16
N2 - We use scanning tunneling microscopy (STM) to study magnetic Fe impurities intentionally doped into the high-temperature superconductor Bi2Sr2CaCu2O8+δ. Our spectroscopic measurements reveal that Fe impurities introduce low-lying resonances in the density of states at Ω1≈4 meV and Ω2≈15 meV, allowing us to determine that, despite having a large magnetic moment, potential scattering of quasiparticles by Fe impurities dominates magnetic scattering. In addition, using high-resolution spatial characterizations of the local density of states near and away from Fe impurities, we detail the spatial extent of impurity-affected regions as well as provide a local view of impurity-induced effects on the superconducting and pseudogap states. Our studies of Fe impurities, when combined with a reinterpretation of earlier STM work in the context of a two-gap scenario, allow us to present a unified view of the atomic-scale effects of elemental impurities on the pseudogap and superconducting states in hole-doped cuprates; this may help resolve a previously assumed dichotomy between the effects of magnetic and nonmagnetic impurities in these materials.
AB - We use scanning tunneling microscopy (STM) to study magnetic Fe impurities intentionally doped into the high-temperature superconductor Bi2Sr2CaCu2O8+δ. Our spectroscopic measurements reveal that Fe impurities introduce low-lying resonances in the density of states at Ω1≈4 meV and Ω2≈15 meV, allowing us to determine that, despite having a large magnetic moment, potential scattering of quasiparticles by Fe impurities dominates magnetic scattering. In addition, using high-resolution spatial characterizations of the local density of states near and away from Fe impurities, we detail the spatial extent of impurity-affected regions as well as provide a local view of impurity-induced effects on the superconducting and pseudogap states. Our studies of Fe impurities, when combined with a reinterpretation of earlier STM work in the context of a two-gap scenario, allow us to present a unified view of the atomic-scale effects of elemental impurities on the pseudogap and superconducting states in hole-doped cuprates; this may help resolve a previously assumed dichotomy between the effects of magnetic and nonmagnetic impurities in these materials.
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U2 - 10.1103/PhysRevLett.117.257003
DO - 10.1103/PhysRevLett.117.257003
M3 - Article
C2 - 28036192
AN - SCOPUS:85006250761
VL - 117
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 25
M1 - 257003
ER -