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Fermi-surface reconstruction by stripe order in cuprate superconductors
F Laliberté1, J Chang, N Doiron-Leyraud
1Département de physique and RQMP, Université de Sherbrooke, Sherbrooke, Québec, J1K 2R1 Canada.
Nature Communications
|August 18, 2011
Summary
The origin of superconductivity pairing lies in the normal state. In cuprates, a non-superconducting ground state with broken translational symmetry, identified as stripe order, is the generic state for hole-doped materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- The pairing mechanism in superconductors is linked to the properties of their normal state.
- Cuprate superconductors like YBa(2)Cu(3)O(y) (YBCO) exhibit complex normal state behavior, including potential density-wave order when superconductivity is suppressed.
- Understanding this normal state is crucial for elucidating high-temperature superconductivity.
Purpose of the Study:
- To investigate the relationship between the normal state and superconductivity in cuprate materials.
- To compare the Fermi-surface reconstruction in YBCO and La(1.8-x)Eu(0.2)Sr(x)CuO(4) (Eu-LSCO).
- To determine the nature of the generic non-superconducting ground state in hole-doped cuprates.
Main Methods:
- Comparative study of thermoelectric transport measurements.
- Analysis of Fermi-surface reconstruction as a function of temperature and doping.
- Investigating the coexistence of Fermi-surface reconstruction with symmetry-breaking orders.
Main Results:
- Both YBCO and Eu-LSCO show identical Fermi-surface reconstruction processes.
- In Eu-LSCO, this reconstruction coexists with spin and charge modulations.
- These modulations indicate a breaking of translational symmetry, consistent with stripe order.
Conclusions:
- Stripe order represents the generic non-superconducting ground state in hole-doped cuprates.
- The Fermi-surface reconstruction is a key process linking the normal state to superconductivity.
- This finding provides insight into the fundamental mechanisms of high-temperature superconductivity.
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