Loading...
Skip to content

Recent Works

    • About Taehwan
    • Publications
Flat-Band Electronic Bipolarity in a Janus and Kagome van der Waals Semiconductor Nb3TeI7

Flat-Band Electronic Bipolarity in a Janus and Kagome van der Waals Semiconductor Nb3TeI7

Posted on January 14, 2025Publications

Janus materials, a novel class of materials with two faces of different chemical compositions and electronic polarities, offer significant potential for various applications with catalytic reactions, chemical sensing, and optical or electronic responses. A key ...

Read more ⟶
Phase stabilization of strained 1⁢T monolayer IrTe2 by electron-phonon coupling modulationtest

Phase stabilization of strained 1⁢T monolayer IrTe2 by electron-phonon coupling modulationtest

Posted on January 14, 2025January 14, 2025Publications

Two-dimensional 1⁢T monolayer (ML) IrTe2 exhibits complex structural phase transitions under external stimuli like temperature or strain. While various mechanisms have been suggested as a major driving force for rich structural phases, their true origin ...

Read more ⟶
Endoscope-Assisted Manipulator for Precooling and Deposition in Low-Temperature STM Systems

Endoscope-Assisted Manipulator for Precooling and Deposition in Low-Temperature STM Systems

Posted on December 17, 2024December 18, 2024Publications

We present the design and implementation of an advanced manipulator system for use in low-temperature scanning tunneling microscope (STM) setups, specifically in an ultrahigh vacuum (UHV) chamber equipped with a bottom-loading cryostat and a superconducting ...

Read more ⟶
An Approach to Breaking the 100-mK Barrier in Electron Temperature with a Dilution-Refrigerator Ultrahigh Vacuum STM

An Approach to Breaking the 100-mK Barrier in Electron Temperature with a Dilution-Refrigerator Ultrahigh Vacuum STM

Posted on November 26, 2024December 18, 2024Publications

This study presents a newly constructed dilution-refrigerator ultrahigh vacuum (UHV) scanning tunneling microscope (STM) with a 9/2/2 T superconducting vector magnet capable of achieving electron temperatures as low as 76 mK. Our design emphasizes robust ...

Read more ⟶
Comment on “Tunneling-tip-induced collapse of the charge gap in the excitonic insulator Ta2NiSe5”

Comment on “Tunneling-tip-induced collapse of the charge gap in the excitonic insulator Ta2NiSe5”

Posted on September 16, 2024September 20, 2024Publications

In this study, we investigate the discrepancy between the estimate of Q. He et al. [Phys. Rev. Res. 3, L032074 (2021)], who observed a remarkable collapse of the exciton gap in Ta2⁢NiSe5 due to the electrostatic field between the scanning ...

Read more ⟶
Revealing inverted chirality of hidden domain wall states in multiband systems without topological transition

Revealing inverted chirality of hidden domain wall states in multiband systems without topological transition

Posted on September 20, 2023September 21, 2023Publications

Chirality, a fundamental concept from biological molecules to advanced materials, is prevalent in nature. Yet, its intricate behavior in specific topological systems remains poorly understood. Here, we investigate the emergence of hidden chiral domain wall ...

Read more ⟶
Microscopic conductivity of passive films on ferritic stainless steel for hydrogen fuel cells

Microscopic conductivity of passive films on ferritic stainless steel for hydrogen fuel cells

Posted on July 18, 2023August 29, 2023Publications

Hydrogen fuel cells offer a clean and sustainable energy conversion solution. The bipolar separator plate, a critical component in fuel cells, plays a vital role in preventing reactant gas cross-contamination and facilitating efficient ion transport ...

Read more ⟶
Atomic-scale tailoring of chemisorbed atomic oxygen on epitaxial graphene for graphene-based electronic devices

Atomic-scale tailoring of chemisorbed atomic oxygen on epitaxial graphene for graphene-based electronic devices

Posted on July 11, 2023July 12, 2023Publications

Graphene, with its unique band structure, mechanical stability, and high charge mobility, holds great promise for next-generation electronics. Nevertheless, its zero bandgap challenges the control of current flow through electrical gating, consequently limiting its practical ...

Read more ⟶
Systematic investigation of wear-induced cold welding in ultrahigh vacuum piezoelectric motors with non-metallic coatings

Systematic investigation of wear-induced cold welding in ultrahigh vacuum piezoelectric motors with non-metallic coatings

Posted on June 7, 2023June 7, 2023Publications

Piezoelectric motors are widely used in various applications where both precision positioning and miniaturization are required. Inertial or quasi-static motors are commonly employed because of their high accuracy, which demands consistent sliding friction between moving ...

Read more ⟶
Dimensional crossover of charge order in IrTe2 with strong interlayer coupling

Dimensional crossover of charge order in IrTe2 with strong interlayer coupling

Posted on January 10, 2023January 11, 2023Publications

Tuning dimensionality in van der Waals materials with finite interlayer coupling has introduced various electronic phase transitions by conventional mechanical exfoliation. Particularly when the electronic order is tied to the modulation of the interlayer coupling, ...

Read more ⟶

Posts navigation

Older posts
Proudly powered by WordPress - Copyright © 2003-2025 | Theme: MiNNaK by Tamer Mancar