TY - JOUR
T1 - New High-Temperature Superconductor (THA)xFeSe
T2 - a Bridge Between Bulk and Monolayer FeSe
AU - Lu, Jihu
AU - He, Huihui
AU - Zhang, Yuhang
AU - Lu, Zouyouwei
AU - Wu, Feng
AU - Liu, Jiali
AU - Liu, Yue
AU - Li, Xiang
AU - Zhang, Hua
AU - Liu, Ziyi
AU - Liu, Kai
AU - Dong, Xiaoli
AU - Zhao, Zhongxian
N1 - Publisher Copyright:
© 2026 Chinese Physical Society and IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved. This article is available under the terms of the https://publishingsupport.iopscience.iop.org/iop-standard/v1.
PY - 2026/5
Y1 - 2026/5
N2 - The nature of enhanced superconductivity in monolayer FeSe still waits for consensus. Finding FeSe-derived bulk superconductors to mimic the monolayer is critical for elucidating the essence of high Tc. Here we report a new high-temperature superconductor, (THA)xFeSe, synthesized by electrochemical intercalation with an expanded c-axis parameter of approximately 18.4 Å. Bulk superconductivity is characterized by superconducting diamagnetization with the transition temperature Tc = 42.0 K as well as resistance transition with (Formula presented) (Formula presented) K. Detailed analysis of the electronic transport behavior reveals that (THA)xFeSe shares nearly identical strong two-dimensional characteristics and significant superconducting fluctuations with monolayer FeSe. Combining the density functional theory calculations with experimental results, this study constructs the phase diagram for FeSe-derived superconductors and analyzes the evolution of Tc with the electron doping levels. These findings bridge the gap between monolayer and bulk FeSe-derived superconductors, opening a new avenue for enhancing Tc in the FeSe system.
AB - The nature of enhanced superconductivity in monolayer FeSe still waits for consensus. Finding FeSe-derived bulk superconductors to mimic the monolayer is critical for elucidating the essence of high Tc. Here we report a new high-temperature superconductor, (THA)xFeSe, synthesized by electrochemical intercalation with an expanded c-axis parameter of approximately 18.4 Å. Bulk superconductivity is characterized by superconducting diamagnetization with the transition temperature Tc = 42.0 K as well as resistance transition with (Formula presented) (Formula presented) K. Detailed analysis of the electronic transport behavior reveals that (THA)xFeSe shares nearly identical strong two-dimensional characteristics and significant superconducting fluctuations with monolayer FeSe. Combining the density functional theory calculations with experimental results, this study constructs the phase diagram for FeSe-derived superconductors and analyzes the evolution of Tc with the electron doping levels. These findings bridge the gap between monolayer and bulk FeSe-derived superconductors, opening a new avenue for enhancing Tc in the FeSe system.
UR - https://www.scopus.com/pages/publications/105041103849
U2 - 10.1088/0256-307X/43/5/050710
DO - 10.1088/0256-307X/43/5/050710
M3 - Letter
AN - SCOPUS:105041103849
SN - 0256-307X
VL - 43
JO - Chinese Physics Letters
JF - Chinese Physics Letters
IS - 5
M1 - 050710
ER -