Spectroscopic Evidence of Disorder-Induced Quantum Phase Transitions in Monolayer Fe(Te,Se) Superconductor
Guanyang He, Ziqiao Wang, Longxin Pan, Yuxuan Lei, Fa Wang, Yi Liu, Nandini Trivedi, Jian Wang
DOI 10.1103/gkvs-4vsb · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The superconductor-insulator transition as a paradigm of quantum phase transitions has attracted tremendous interest over the past three decades. While the magnetic field and carrier density can be tuned to drive the transition, the role of disorder in the transition is not well understood due to the complicated interplay between superconductivity and electron localization. In this Letter, we controllably introduce disorder in a two-dimensional high-temperature superconductor by depositing iron clusters onto the superconducting monolayer Fe(Te,Se) crystalline film. The spectral evolution from superconducting gaps to insulating gaps with increasing disorder is detected by scanning tunneling spectroscopy measurements. When the disorder is strong, large U-shaped gaps are observed and attributed to the localization-enhanced Cooper pair correlation. Our observations provide insight into the emergent phases of low-dimensional and high-temperature superconductors with disorder.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Fe(Te,Se) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 56.4 | Pressure not reported | onset |
Similar papers
Spectroscopic evidence of disorder-induced quantum phase transitions in monolayer Fe(Te,Se) superconductor
similarity 0.99Guanyang He et al. · 2026 · arXiv:2603.04717
Source status unknown — claims are unverified
Observation of topological transition in high-Tc superconducting monolayer FeTe1−xSex films on SrTiO3(001)
similarity 0.95X.-L. Peng et al.
Source status unknown — claims are unverified
Superconductivity in FeSe Thin Films Driven by the Interplay between Nematic Fluctuations and Spin-Orbit Coupling
similarity 0.94Jian Kang & Rafael M. Fernandes
Source status unknown — claims are unverified
High-Temperature Superconductivity in Single-Unit-Cell FeSe Films on Anatase TiO2(001)
similarity 0.94Hao Ding et al.
Source status unknown — claims are unverified
Role of SrTiO3 phonon penetrating into thin FeSe films in the enhancement of superconductivity
similarity 0.94Shuyuan Zhang et al.
Source status unknown — claims are unverified
Parity Breaking and Sublattice Dichotomy in Monolayer FeSe Superconductor
similarity 0.94Cui Ding et al.
Source status unknown — claims are unverified