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daiqho authored Dec 23, 2024
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Expand Up @@ -158,21 +158,20 @@ <h1 class="sitetitle">Dai Q. Ho</h1>
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I am passionate about exploring the multifaceted properties of quantum materials, with a focus on their structural, electronic, magnetic, optical, and transport characteristics.
My research extends to various intriguing classes of quantum materials, including topological materials, magnetic materials, and two-dimensional (2D) materials.
These materials exhibit a diverse array of properties that hold great potential across a spectrum of applications, ranging from low-power electronic devices to energy-efficient technologies and catalytic processes.
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<strong> Project 1/ Controlling spin dynamics in altermagnets by strong coupling </strong> <br>
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Altermagnetism (AM), a recently identified phase of magnetism, features spin-split electronic band structures without net magnetization. This behavior stems from local symmetry breaking between magnetic sublattices in the crystal.
In this project, we explore the control of spin dynamics in AM by employing strong coupling between magnon quasiparticles in altermagnets and other quasiparticles, such as surface plasmons in topological insulators.
By leveraging this strong coupling, we aim to manipulate magnon dynamics—including spin current—through external stimuli such as optical excitation or thermal gradients.
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In this project, we show that, unlike the non-magnetic bulk, spontaneous magnetization can arise at the surface of (110)-oriented RuO<sub>2</sub> samples due to the symmetry breaking at the surface termination,
leading to electronic redistribution and enhanced magnetic moments.
This surface magnetism gives rise to spin-polarized surface states, spin-dependent transport effects, and spin-polarized microscopy images, highlighting the significant role of surface structures in non-magnetic bulk materials.<br>
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<strong> Project 3/ Tuning electronic band topology of rare-earth monopnictides by dimensionality reduction </strong> <br>
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In this project, we have shown that, contrary to conventional expectation, bulk semimetallic rare-earth monopnictides (RE-V) could be transitioned to a quantum spin Hall insulator phase in ultra-thin films.<br>
<strong> Project 4/ Tuning band topology of rare-earth monopnictides by epitaxial strain </strong><br>
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