Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Bulletin of the American Physical Society

Preformed pairing in superconducting FeSe in the BCS-BEC cross-over regime

S. Kasahara, Yusuke Shimoyama, Ryota Kobayashi, Takuya Yamashita, Tatsuya Watashige, Yuki Matsuda, T. Shibauchi, T. Wolf, A. E. B ohmer, Fr 'ed 'eric Hardy, C. Meingast, H. v. L ohneysen

Published Mar 2, 2015• 0 citations
OpenAlex

Related papers

Evidence for FFLO superconducting states in the BCS-BEC crossover superconductor FeSe

S. Kasahara

Bulletin of the American Physical Society•Mar 18, 2021•0 citations

BCS-BEC crossover in FeSe with small Fermi energies

S. Kasahara

Bulletin of the American Physical Society•Mar 16, 2017•0 citations

Manifestation of the multiband nature in the BCS-BEC crossover of FeSe 1- x S x

Takahiro Hashimoto, Y. Ota, Akihiro Tsuzuki +9 more

Bulletin of the American Physical Society•Mar 2, 2020•0 citations

Signature of BCS-BEC Crossover in an Iron-Based Superconductor FeSe$_{\mathrm{0.5}}$Te$_{\mathrm{0.5}}$.

Shankar Kunwar

Bulletin of the American Physical Society•May 30, 2018•0 citations

Fermion Pairing and BEC-BCS Crossover in Novel Systems

Renyuan Liao

•Jan 1, 2008•0 citations

Superconductivity of the FeSe/SrTiO3 Interface in View of BCS–BEC Crossover*

Shuyuan Zhang, Guangyao Miao, Jiaqi Guan +6 more

In paired Fermi systems, strong many-body effects exhibit in the crossover regime between the Bardeen–Cooper–Schrieffer (BCS) and the Bose–Einstein condensation (BEC) limits. The concept of the BCS–BEC crossover, which is studied intensively in the research field of cold atoms, has been extended to condensed matters. Here by analyzing the typical superconductors within the BCS–BEC phase diagram, we find that FeSe-based superconductors are prone to shift their positions in the BCS–BEC crossover regime by charge doping or substrate substitution, since their Fermi energies and the superconducting gap sizes are comparable. Especially at the interface of single-layer FeSe on SrTiO 3 substrate, the superconductivity is relocated closer to the crossover unitary than other doped FeSe-based materials, indicating that the pairing interaction is effectively modulated. We further show that hole-doping can drive the interfacial system into the phase with possible pre-paired electrons, demonstrating its flexible tunability within the BCS–BEC crossover regime.

arXiv:1908.11126•Chinese Physics Letters•Oct 1, 2019•9 citations
Signature of BCS-BEC Crossover in an Iron-Based Superconductor FeSe0.5_{\mathrm{0.5}}0.5​Te0.5_{\mathrm{0.5}}0.5​.
In paired Fermi systems, strong many-body effects exhibit in the crossover regime between the Bardeen–Cooper–Schrieffer (BCS) and the Bose–Einstein condensation (BEC) limits. The concept of the BCS–BEC crossover, which is studied intensively in the research field of cold atoms, has been extended to condensed matters. Here by analyzing the typical superconductors within the BCS–BEC phase diagram, we find that FeSe-based superconductors are prone to shift their positions in the BCS–BEC crossover regime by charge doping or substrate substitution, since their Fermi energies and the superconducting gap sizes are comparable. Especially at the interface of single-layer FeSe on SrTiO 3 substrate, the superconductivity is relocated closer to the crossover unitary than other doped FeSe-based materials, indicating that the pairing interaction is effectively modulated. We further show that hole-doping can drive the interfacial system into the phase with possible pre-paired electrons, demonstrating its flexible tunability within the BCS–BEC crossover regime.