Charge transfer caused anomalies of physical properties of

Haoyu Zhuang; Jianli Bai; Jingwen Cheng; Xiangfei Li; Ying Meng; Luyao Wang; Qinghua Zhang; Xi Shen; Yumei Wang; Genfu Chen; Richeng Yu

doi:10.1209/0295-5075/adb44e

All issues

Volume 150 / No 3 (May 2025)

EPL, 150 3 (2025) 36003

Abstract

Issue		EPL Volume 150, Number 3, May 2025


Article Number		36003
Number of page(s)		6
Section		Condensed matter and materials physics
DOI		https://doi.org/10.1209/0295-5075/adb44e
Published online		30 April 2025

EPL, 150 (2025) 36003

Charge transfer caused anomalies of physical properties of $\textrm {KV}_{2}\textrm {Se}_{2}\textrm {O}$

Haoyu Zhuang¹^,2, Jianli Bai¹^,2, Jingwen Cheng¹^,2, Xiangfei Li¹^,2, Ying Meng¹^,2, Luyao Wang¹^,2, Qinghua Zhang¹^,2, Xi Shen¹^,2 (xshen@.iphy.ac.cn), Yumei Wang¹^,2, Genfu Chen¹^,2 (gfchen@iphy.ac.cn) and Richeng Yu¹^,2^,3 (rcyu@.iphy.ac.cn)

¹ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences Beijing, 100190, China
² School of Physical Sciences, University of Chinese Academy of Sciences Beijing, 100049, China
³ Songshan Lake Materials Laboratory - Dongguan, Guangdong, 523808, China

Received: 12 October 2024
Accepted: 10 February 2025

Abstract

Persistent efforts have been devoted to unraveling the fundamental mechanism behind superconductivity. In the pursuit of novel unconventional superconductors, layered transition metal compounds have emerged as promising candidates. In this work, transmission electron microscopy, electron energy loss spectroscopy (EELS), and first-principles calculations are used to investigate the underlying causes of the anomalies of the susceptibility and resistivity of KV₂Se₂O. No evidence of either long-range or short-range ordered structural phase transition related to CDW is observed. However, our findings reveal a variation in the electronic configuration of vanadium occurring at low temperatures, which is supported by EELS spectra and Bader charge analysis. The change in electronic configuration may elucidate the anomalies of physical properties.

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