Journal article
Impurity-induced low-energy resonances in Bi 2 Sr 2 CaCu 2 O 8 + δ
Physical review. B, Condensed matter and materials physics, Vol.70(14), 140510(R)
10/2004
DOI: 10.1103/PhysRevB.70.140510
Abstract
We study sharp low-energy resonance peaks in the local density of states (LDOS) induced by Zn impurities or possible Cu vacancies in superconducting Bi2Sr2CaCu2O8+δ. The measured structure of these near-zero-bias resonances is quantitatively reproduced by an extended impurity potential without invoking internal impurity states or sophisticated tunneling models. The Zn potential extends at least to the nearest-neighbor Cu sites, and the range of order parameter suppression extends at least 8 Å away from the Zn site. We further show that the local spin susceptibilities near Zn impurities increase rather than decrease with decreasing temperature in the superconducting state due to the sharp increase of the LDOS near the Fermi level.
Details
- Title: Subtitle
- Impurity-induced low-energy resonances in Bi 2 Sr 2 CaCu 2 O 8 + δ
- Creators
- Jian-Ming TangMichael E. Flatté - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Physical review. B, Condensed matter and materials physics, Vol.70(14), 140510(R)
- DOI
- 10.1103/PhysRevB.70.140510
- NLM abbreviation
- Phys Rev B Condens Matter Mater Phys
- ISSN
- 1098-0121
- eISSN
- 1550-235X
- Publisher
- American Physical Society
- Language
- English
- Date published
- 10/2004
- Academic Unit
- Electrical and Computer Engineering; Physics and Astronomy
- Record Identifier
- 9984428804602771
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