Correlation at two-dimensional charge-transfer FeSe interface

Yulong Huang; Yong Hu; Feng Hu; Ruizhe Yang; Changning Li; Jason N Armstrong; Shenqiang Ren

doi:10.1039/c9cc06163k

Correlation at two-dimensional charge-transfer FeSe interface

Chem Commun (Camb). 2019 Oct 17;55(84):12643-12646. doi: 10.1039/c9cc06163k.

Authors

Yulong Huang¹, Yong Hu¹, Feng Hu¹, Ruizhe Yang¹, Changning Li¹, Jason N Armstrong¹, Shenqiang Ren¹

Affiliation

¹ Department of Mechanical and Aerospace Engineering, Research and Education in Energy Environment & Water (RENEW) Institute, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA. shenren@buffalo.edu.

PMID: 31580340
DOI: 10.1039/c9cc06163k

Abstract

The charge transfer and spin coupling effects are explored at the interface of two-dimensional (2D) superconducting FeSe nanosheets and molecular photochromic potassium-7,7,8,8-tetracyanoquinodimethane (KTCNQ). Light-induced conductivity in 2D FeSe nanosheets is enhanced by the electron doping from KTCNQ by the destabilized spin-Peierls phase through their interface. Furthermore, the spin coupling at the interface of FeSe and KTCNQ shifts the dimerization transition temperature of KTCNQ. Our results suggest 2D exfoliated FeSe nanosheets as a versatile strongly correlated platform for the study of interfacial electron doping and spin coupling.