Explanipedia

Berry curvature and quantum oscillation from multi-orbital coadjoint-orbit bosonization Open

Mengxing Ye, Yuxuan Wang · 2025

We develop an effective field theory for a multi-orbital fermionic system using the method of coadjoint orbits for higher-dimensional bosonization. The dynamical bosonic fields are single-particle distribution functions defined on the phas…

Nonvolatile Nematic Order Manipulated by Strain and Magnetic Field in a Layered Antiferromagnet Open

Zili Feng, Lujun Huang, Tao Lü, Fangyan Liu, Joseph R. Sheeran , et al. · 2025

The operation mechanism of nematic liquid crystals lies in the control of their optical properties by the orientation of underlying nematic directors. In analogy, electronic nematicity refers to a state whose electronic properties spontane…

Loop-current order through the kagome looking glass Open

Rafael M. Fernandes, Turan Birol, Mengxing Ye, David Vanderbilt · 2025

In loop-current states, interacting electronic degrees of freedom collectively establish interatomic currents, in a rare example of magnetism in which spin degrees of freedom do not play the primary role. The main impact of such states on …

Berry Phase and Quantum Oscillation from Multi-orbital Coadjoint-orbit Bosonization Open

Mengxing Ye, Yao Wang · 2024

We develop an effective field theory for a multi-orbital fermionic system using the method of coadjoint orbits for higher-dimensional bosonization. The dynamical bosonic fields are single-particle distribution functions defined on the phas…

Coadjoint-orbit bosonization of a Fermi surface in a weak magnetic field Open

Mengxing Ye, Yuxuan Wang · 2024

We present a bosonized effective field theory for a 2d Fermi surface in a weak magnetic field using the coadjoint orbit approach, which was recently developed as a nonlinear bosonization method in phase space for Fermi liquids and non-Ferm…

Distinct Optical Excitation Mechanisms of a Coherent Magnon in a van der Waals Antiferromagnet Open

Clifford J. Allington, Carina A. Belvin, Urban F. P. Seifert, Mengxing Ye, Tommy Tai , et al. · 2024

The control of antiferromagnets with ultrashort optical pulses has emerged as a prominent field of research. Tailored laser excitation can launch coherent spin waves at terahertz frequencies, yet a comprehensive description of their genera…

Crucial role of thermal fluctuations and vertex corrections for the magnetic pseudogap Open

Mengxing Ye, Andrey V. Chubukov · 2023

It is generally believed that in a 2D metal, whose ground state is antiferromagnetically ordered with ${\bf Q} = (π,π)$, thermal (static) magnetic fluctuations give rise to precursor behavior above $T_N$, in which the spectral function of …

Location and thermal evolution of the pseudogap due to spin fluctuations Open

Mengxing Ye, Zhentao Wang, Rafael M. Fernandes, Andrey V. Chubukov · 2023

We study pseudogap behavior in a metal near a spin density wave (SDW) instability due to thermal magnetic fluctuations. We consider the $t-t'$ Hubbard model on a square lattice at a finite doping, at intermediate coupling strength, and ana…

Fractionalized Excitations Probed by Ultrasound Open

A. Hauspurg, S. Zherlitsyn, T. Helm, V. Felea, J. Wosnitza , et al. · 2023

In this work, we study magnetoelastic interactions by means of ultrasound experiments in $α$-RuCl$_3$ -- a prototypical material for the Kitaev spin model on the honeycomb lattice, with a possible spin-liquid state featuring Majorana fermi…

A construction of exotic metallic states Open

Xiaochuan Wu, Yichen Xu, Mengxing Ye, Zhu-Xi Luo, Cenke Xu · 2022

We discuss examples of two dimensional metallic states with charge fractionalization, and we will demonstrate that the mechanism of charge fractionalization leads to exotic metallic behaviors at low and intermediate temperature. The simple…

Ultrafast optical excitation of magnetic dynamics in van der Waals magnets: Coherent magnons and BKT dynamics in NiPS$_3$ Open

Urban F. P. Seifert, Mengxing Ye, Leon Balents · 2021

Optical pump-probe experiments carried out in the time domain reveal both the intrinsic low energy dynamics and its connections to higher energy excitations in correlated electron systems. In this work, we propose two microscopic mechanism…

Phonon Hall Viscosity in Magnetic Insulators Open

Mengxing Ye, L. Savary, Leon Balents · 2021

The Phonon Hall Viscosity is the leading term evincing time-reversal symmetry breaking in the low energy description of lattice phonons. It may generate phonon Berry curvature, and can be observed experimentally through the acoustic Farada…

Phonon Hall Viscosity and Berry Phase in Magnetic Insulators Open

Mengxing Ye, Leon Balents · 2020

Magnetism in correlated electron systems Open

Mengxing Ye · 2019

University of Minnesota Ph.D. dissertation. August 2019. Major: Physics. Advisor: Andrey Chubukov. 1 computer file (PDF); xiv, 147 pages.

Quantization of the thermal Hall conductivity at small Hall angles Open

Mengxing Ye · 2018

We consider the effect of coupling between phonons and a chiral Majorana edge in a gapped chiral spin liquid with Ising anyons (e.g., Kitaev's non-Abelian spin liquid on the honeycomb lattice). This is especially important in the regime in…

Quantum phase transitions in Heisenberg $J_1-J_2$ triangular antiferromagnet in a magnetic field Open

Mengxing Ye, Andrey V. Chubukov · 2016

We present the zero temperature phase diagram of a Heisenberg antiferromagnet on a frustrated triangular lattice with nearest neighbor ($J_1$) and next nearest neighbor ($J_2$) interactions, in a magnetic field. We show that the classical …

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