Suppression of Superfluid Density and the Pseudogap State in the Cuprates by Impurities
Name
PhysRevLett.117.257003.pdf
Size
597.81 KB
Format
Adobe PDF
Checksum (MD5)
67dd1bc3e58d40100d1e8ae84fbcf8cf
Author(s)
Erdenemunkh, Unurbat
Koopman, Brian
Fu, Ling
Gu, G. D.
Chatterjee, Kamalesh
Wise, William D
Hudson, Eric
Boyer, Michael
Date Issued
December 2016
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Erdenemunkh, Unurbat et al. “Suppression of Superfluid Density and the Pseudogap State in the Cuprates by Impurities.” Physical Review Letters 117.25 (2016): n. pag. © 2016 American Physical Society
Version
Final published version
Abstract
We use scanning tunneling microscopy (STM) to study magnetic Fe impurities intentionally doped into the high-temperature superconductor Bi[subscript 2]Sr[subscript 2]CaCu[subscript 2]O[subscript 8+δ]. Our spectroscopic measurements reveal that Fe impurities introduce low-lying resonances in the density of states at Ω[subscript 1] ≈4 meV and Ω[subscript 2] ≈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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevLett.117.257003
