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Fermi Surface of the Most Dilute Superconductor
Open accessAbstract
The origin of superconductivity in bulk SrTiO 3 is a mystery since the nonmonotonous variation of the critical transition with carrier concentration defies the expectations of the crudest version of the BCS theory.Here, employing the Nernst effect, an extremely sensitive probe of tiny bulk Fermi surfaces, we show that, down to concentrations as low as 5:5 Â 10 17 cm À3 , the system has both a sharp Fermi surface and a superconducting ground state.The most dilute superconductor currently known therefore has a metallic normal state with a Fermi energy as little as 1.1 meV on top of a band gap as large as 3 eV.The occurrence of a superconducting instability in an extremely small, single-component, and barely anisotropic Fermi surface implies strong constraints for the identification of the pairing mechanism.
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Cited by
Physics of SrTiO3-based heterostructures and nanostructures: a review
Pai, Y.-Y., Tylan-Tyler, A., Irvin, P., & Levy, J. (2018) · Reports on Progress in Physics · doi:10.1088/1361-6633/aa892d · Cited by 309
Nakajima, Y., Hu, R., Kirshenbaum, K., Hughes, A., Syers, P., Wang, X., Wang, K., Wang, R., Saha, S. R., Pratt, D., et al. (2015) · Science Advances · doi:10.1126/sciadv.1500242 · Cited by 212
Metadata
- Authors
- Lin, X., Zhu, Z., Fauqué, B., & Behnia, K.
- Venue
- Physical Review X
- Publisher
- American Physical Society (APS)
- Published
- 2013-04-15
- Volume
- 3
- Issue
- 2
- ISSN
- 2160-3308 (ISSN-L)
- OpenAlex
- W1951283633
- Cited by
- 161
- References
- 0
- FWCI
- 9.45
- Type
- journal article
- Language
- en
- Open access
- gold
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- CoChat. (2026). Citation check: Fermi Surface of the Most Dilute Superconductor. https://app.cochat.ai/papers/10.1103/physrevx.3.021002
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- Lin, X., Zhu, Z., Fauqué, B., & Behnia, K. (2013). Fermi Surface of the Most Dilute Superconductor. Physical Review X. https://doi.org/10.1103/physrevx.3.021002
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