Abstract
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.
| Original language | English (US) |
|---|---|
| Article number | 257003 |
| Journal | Physical Review Letters |
| Volume | 117 |
| Issue number | 25 |
| DOIs | |
| State | Published - Dec 16 2016 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
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Suppression of Superfluid Density and the Pseudogap State in the Cuprates by Impurities. / Erdenemunkh, Unurbat; Koopman, Brian; Fu, Ling; Chatterjee, Kamalesh; Wise, W. D.; Gu, G. D.; Hudson, E. W.; Boyer, Michael C.
In: Physical Review Letters, Vol. 117, No. 25, 257003, 16.12.2016.Research output: Contribution to journal › Article
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.
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 -