Yen Fei

activity

20072025

most citedPressure-driven dome-shaped superconductivity and electronic structural evolution in tungsten ditelluride

414 citations · 586 across the 16 of their papers we have counts for

collaborators

Showing 2024Show all

7 papers · 1 filter

cond-mat.mtrl-sci2024★ 5 cited

Inducing ferroelectricity in NH $_{4}$ I and NH $_{4}$ Br via partial replacement of protons by deuterons

Miao Miao Zhao, Lei Meng, Yi Yang Xu +2

While all of the polymorphs of NH $_{4}$ I and NH $_{4}$ Br are non-polar, a reversible electric polarization is established in the ordered $γ$ phases of (NH $_{4}$ ) $_{0.73}$ (ND $_{4}$ ) $_{0.27}$ …

cond-mat.mtrl-sci2024★ 3 cited

Electric Polarization and Magnetic Properties of (NH $_{4}$ ) $_{1 - x}$ K $_{x}$ I (x = 0.05-0.17)

Yi Yang Xu, Lei Meng, Miao Miao Zhao +2

While all of the polymorphs of pure NH $_{4}$ I and KI are non-polar, we identify that (NH $_{4}$ ) $_{0.95}$ K $_{0.05}$ I is ferroelectric and (NH $_{4}$ ) $_{0.87}$ K $_{0.13}$ I and (NH $_{4}$ )$_{0.8…

cond-mat.mtrl-sci2024★ 3 cited

Ferroelectricity Driven by Orbital Resonance of Protons in CH $_{3}$ NH $_{3}$ Cl and CH $_{3}$ NH $_{3}$ Br

Chu Xin Peng, Lei Meng, Yi Yang Xu +4

The $β$ and $γ$ phases of methylammonium chloride CH $_{3}$ NH $_{3}$ Cl and methylammonium bromide CH $_{3}$ NH $_{3}$ Br are identified to be ferroelectric $v ia$ pyroelectric current and dielect…

cond-mat.mtrl-sci2024★ 5 cited

Magnetic interactions based on proton orbital motion in CH $_{3}$ NH $_{3}$ PbI $_{3}$ and CH $_{3}$ NH $_{3}$ PbBr $_{3}$

Lei Meng, Miao Miao Zhao, Yi Yang Xu +5

The microscopic origin of the remarkable optoelectronic properties of one of the most studied contemporary materials remains unclear. Here, we identify the existence of magnetic in…

cond-mat.mtrl-sci2024★ 6 cited

Magnetic Properties of NH $_{4}$ H $_{2}$ PO $_{4}$ and KH $_{2}$ PO $_{4}$ : Emergence of Multiferroic Salts

Lei Meng, Chen He, Wei Ji +1

We observe sharp step-down discontinuities in the magnetic susceptibility of NH $_{4}$ H $_{2}$ PO $_{4}$ and NH $_{4}$ H $_{2}$ PO $_{4}$ - $d$ $_{60}$ (60% deuterated) along the $a$ and $c$ -axes occurrin…

cond-mat.mtrl-sci2024★ 6 cited

Magnetoelectric Coupling Based on Protons in Ammonium Sulfate

Lei Meng, Chen He, Fei Yen

Most ferroelectric crystals have their own set of unique characteristics and ammonium sulfate (NH $_{4}$ ) $_{2}$ SO $_{4}$ is no exception. We report on two previously unidentified features…

cond-mat.mtrl-sci2024★ 2 cited

Determining the chemical composition of diamagnetic mixed solids via measurements of the magnetic susceptibility

Miao Miao Zhao, Yang Yang, Na Du +3

Mixed solid compounds are employed in a vast array of applications so an accurate determination of their chemical compositions is of crucial importance. All current characterizatio…

Inducing ferroelectricity in NH4​I and NH4​Br via partial replacement of protons by deuterons

Electric Polarization and Magnetic Properties of (NH4​)1−x​Kx​I (x = 0.05-0.17)

Ferroelectricity Driven by Orbital Resonance of Protons in CH3​NH3​Cl and CH3​NH3​Br

Magnetic interactions based on proton orbital motion in CH3​NH3​PbI3​ and CH3​NH3​PbBr3​

Magnetic Properties of NH4​H2​PO4​ and KH2​PO4​: Emergence of Multiferroic Salts