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Journal Articles

Variable Focal Length Lenses Made of Gelatin

Yu Jin Ahn, Hee Ra Kim, Yu Chen, Ji Hyun Kim, Hyukjoon Choi, Jung Bog Kim
Journal: The Physics Teacher
Phys. Teach. 61, 470–472 (2023)
https://doi.org/10.1119/5.0084702
Published: September 2023
View article titled, Variable Focal Length Lenses Made of Gelatin
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Journal Articles

On the conduction mechanism in compositionally graded AlGaN

Editor’s Pick
Shashwat Rathkanthiwar, Pegah Bagheri, Dolar Khachariya, Ji Hyun Kim, Yasutomo Kajikawa, Pramod Reddy, Seiji Mita, Ronny Kirste, Baxter Moody, Ramon Collazo, Zlatko Sitar
Journal: Applied Physics Letters
Appl. Phys. Lett. 121, 072106 (2022)
https://doi.org/10.1063/5.0100756
Published: August 2022
View article titled, On the conduction mechanism in compositionally graded AlGaN
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Journal Articles

Doping and compensation in heavily Mg doped Al-rich AlGaN films

Editor’s Pick
Pegah Bagheri, Andrew Klump, Shun Washiyama, M. Hayden Breckenridge, Ji Hyun Kim, Yan Guan, Dolar Khachariya, Cristyan Quiñones-García, Biplab Sarkar, Shashwat Rathkanthiwar, Pramod Reddy, Seiji Mita, Ronny Kirste, Ramón Collazo, Zlatko Sitar
Journal: Applied Physics Letters
Appl. Phys. Lett. 120, 082102 (2022)
https://doi.org/10.1063/5.0082992
Published: February 2022
View article titled, Doping and compensation in heavily Mg doped Al-rich AlGaN films
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Journal Articles

A pathway to highly conducting Ge-doped AlGaN

Pegah Bagheri, Ji Hyun Kim, Shun Washiyama, Pramod Reddy, Andrew Klump, Ronny Kirste, Seiji Mita, Ramón Collazo, Zlatko Sitar
Journal: Journal of Applied Physics
J. Appl. Phys. 130, 205703 (2021)
https://doi.org/10.1063/5.0071791
Published: November 2021
View article titled, A pathway to highly conducting Ge-doped AlGaN
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Journal Articles

Study on avalanche breakdown and Poole–Frenkel emission in Al-rich AlGaN grown on single crystal AlN

Pramod Reddy, Dolar Khachariya, Will Mecouch, M. Hayden Breckenridge, Pegah Bagheri, Yan Guan, Ji Hyun Kim, Spyridon Pavlidis, Ronny Kirste, Seiji Mita, Erhard Kohn, Ramon Collazo, Zlatko Sitar
Journal: Applied Physics Letters
Appl. Phys. Lett. 119, 182104 (2021)
https://doi.org/10.1063/5.0062831
Published: November 2021
View article titled, Study on avalanche breakdown and Poole–Frenkel emission in Al-rich AlGaN grown on single crystal AlN
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Journal Articles

On the Ge shallow-to-deep level transition in Al-rich AlGaN

Pegah Bagheri, Pramod Reddy, Seiji Mita, Dennis Szymanski, Ji Hyun Kim, Yan Guan, Dolar Khachariya, Andrew Klump, Spyridon Pavlidis, Ronny Kirste, Ramón Collazo, Zlatko Sitar
Journal: Journal of Applied Physics
J. Appl. Phys. 130, 055702 (2021)
https://doi.org/10.1063/5.0059037
Published: August 2021
View article titled, On the Ge shallow-to-deep level transition in Al-rich AlGaN
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Journal Articles

Temperature dependence of electronic bands in Al/GaN by utilization of invariant deep defect transition energies

Ji Hyun Kim, Pegah Bagheri, Shun Washiyama, Andrew Klump, Ronny Kirste, Seiji Mita, Pramod Reddy, Ramón Collazo, Zlatko Sitar
Journal: Applied Physics Letters
Appl. Phys. Lett. 119, 022101 (2021)
https://doi.org/10.1063/5.0055409
Published: July 2021
View article titled, Temperature dependence of electronic bands in Al/GaN by utilization of invariant deep defect transition energies
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Journal Articles

Self-compensation in heavily Ge doped AlGaN: A comparison to Si doping

Shun Washiyama, Kelsey J. Mirrielees, Pegah Bagheri, Jonathon N. Baker, Ji-Hyun Kim, Qiang Guo, Ronny Kirste, Yan Guan, M. Hayden Breckenridge, Andrew J. Klump, Pramod Reddy, Seiji Mita, Douglas L. Irving, Ramón Collazo, Zlatko Sitar
Journal: Applied Physics Letters
Appl. Phys. Lett. 118, 042102 (2021)
https://doi.org/10.1063/5.0035957
Published: January 2021
View article titled, Self-compensation in heavily Ge doped AlGaN: A comparison to Si doping
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Includes: Supplementary data
Journal Articles

Impact of impurity-based phonon resonant scattering on thermal conductivity of single crystalline GaN

Featured
Pegah Bagheri, Pramod Reddy, Ji Hyun Kim, Robert Rounds, Tomasz Sochacki, Ronny Kirste, Michał Bockowski, Ramón Collazo, Zlatko Sitar
Journal: Applied Physics Letters
Appl. Phys. Lett. 117, 082101 (2020)
https://doi.org/10.1063/5.0018824
Published: August 2020
View article titled, Impact of impurity-based phonon resonant scattering on thermal conductivity of single crystalline GaN
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Journal Articles

Pinning of energy transitions of defects, complexes, and surface states in AlGaN alloys

Pramod Reddy, Zachary Bryan, Isaac Bryan, Ji Hyun Kim, Shun Washiyama, Ronny Kirste, Seiji Mita, James Tweedie, Douglas L. Irving, Zlatko Sitar, Ramón Collazo
Journal: Applied Physics Letters
Appl. Phys. Lett. 116, 032102 (2020)
https://doi.org/10.1063/1.5140995
Published: January 2020
View article titled, Pinning of energy transitions of defects, complexes, and surface states in AlGaN alloys
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Journal Articles

Oxygen desorption kinetics of ZnO nanorod–gated AlGaN/GaN HEMT-based UV photodetectors

Fasihullah Khan, Waqar Khan, Ji Hyun Kim, Noor ul Huda, Hafiz Muhammad Salman Ajmal, Sam-Dong Kim
Journal: AIP Advances
AIP Advances 8, 075225 (2018)
https://doi.org/10.1063/1.5040295
Published: July 2018
View article titled, Oxygen desorption kinetics of ZnO nanorod–gated AlGaN/GaN HEMT-based UV photodetectors
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Journal Articles

Concentration effects on the rates of irreversible diffusion-influenced reactions

Minjung Kim, Sangyoub Lee, Ji-Hyun Kim
Journal: The Journal of Chemical Physics
J. Chem. Phys. 141, 084101 (2014)
https://doi.org/10.1063/1.4893340
Published: August 2014
View article titled, Concentration effects on the rates of irreversible diffusion-influenced reactions
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Journal Articles

An accurate expression for the rates of diffusion-influenced bimolecular reactions with long-range reactivity

Chang Yun Son, Jaehoon Kim, Ji-Hyun Kim, Jun Soo Kim, Sangyoub Lee
Journal: The Journal of Chemical Physics
J. Chem. Phys. 138, 164123 (2013)
https://doi.org/10.1063/1.4802584
Published: April 2013
View article titled, An accurate expression for the rates of diffusion-influenced bimolecular reactions with long-range reactivity
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Journal Articles

Anisotropic optical absorption of organic rubrene single nanoplates and thin films studied by μ-mapping absorption spectroscopy

Hyunsoo Lee, Ji Hyun Kim, Krishna P. Dhakal, Jin Woo Lee, Jin Sun Jung, Jinsoo Joo, Jeongyong Kim
Journal: Applied Physics Letters
Appl. Phys. Lett. 101, 113103 (2012)
https://doi.org/10.1063/1.4751981
Published: September 2012
View article titled, Anisotropic optical absorption of organic rubrene single nanoplates and thin films studied by μ-mapping absorption spectroscopy
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Includes: Supplementary data
Journal Articles

First-principles study of interstitial diffusion of oxygen in nickel chromium binary alloy

Jong Jin Kim, Sang Hun Shin, Ju Ang Jung, Kyung Joon Choi, Ji Hyun Kim
Journal: Applied Physics Letters
Appl. Phys. Lett. 100, 131904 (2012)
https://doi.org/10.1063/1.3696079
Published: March 2012
View article titled, First-principles study of interstitial diffusion of oxygen in nickel chromium binary alloy
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Journal Articles

Effects of nanofluids containing graphene/graphene-oxide nanosheets on critical heat flux

Sung Dae Park, Seung Won Lee, Sarah Kang, In Cheol Bang, Ji Hyun Kim, Hyeon Suk Shin, Dong Wook Lee, Dong Won Lee
Journal: Applied Physics Letters
Appl. Phys. Lett. 97, 023103 (2010)
https://doi.org/10.1063/1.3459971
Published: July 2010
View article titled, Effects of nanofluids containing graphene/graphene-oxide nanosheets on critical heat flux
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Journal Articles

A benchmark study on the thermal conductivity of nanofluids

Jacopo Buongiorno, David C. Venerus, Naveen Prabhat, Thomas McKrell, Jessica Townsend, Rebecca Christianson, Yuriy V. Tolmachev, Pawel Keblinski, Lin-wen Hu, Jorge L. Alvarado, In Cheol Bang, Sandra W. Bishnoi, Marco Bonetti, Frank Botz, Anselmo Cecere, Yun Chang, Gang Chen, Haisheng Chen, Sung Jae Chung, Minking K. Chyu, Sarit K. Das, Roberto Di Paola, Yulong Ding, Frank Dubois, Grzegorz Dzido, Jacob Eapen, Werner Escher, Denis Funfschilling, Quentin Galand, Jinwei Gao, Patricia E. Gharagozloo, Kenneth E. Goodson, Jorge Gustavo Gutierrez, Haiping Hong, Mark Horton, Kyo Sik Hwang, Carlo S. Iorio, Seok Pil Jang, Andrzej B. Jarzebski, Yiran Jiang, Liwen Jin, Stephan Kabelac, Aravind Kamath, Mark A. Kedzierski, Lim Geok Kieng, Chongyoup Kim, Ji-Hyun Kim, Seokwon Kim, Seung Hyun Lee, Kai Choong Leong, Indranil Manna, Bruno Michel, Rui Ni, Hrishikesh E. Patel, John Philip, Dimos Poulikakos, Cecile Reynaud, Raffaele Savino, Pawan K. Singh, Pengxiang Song, Thirumalachari Sundararajan, Elena Timofeeva, Todd Tritcak, Aleksandr N. Turanov, Stefan Van Vaerenbergh, Dongsheng Wen, Sanjeeva Witharana, Chun Yang, Wei-Hsun Yeh, Xiao-Zheng Zhao, Sheng-Qi Zhou
Journal: Journal of Applied Physics
J. Appl. Phys. 106, 094312 (2009)
https://doi.org/10.1063/1.3245330
Published: November 2009
View article titled, A benchmark study on the thermal conductivity of nanofluids
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Journal Articles

Kinetics of collision-induced reactions between hard-sphere reactants

Ji-Hyun Kim, Sangyun Lee, Jinuk Lee, Sangyoub Lee
Journal: The Journal of Chemical Physics
J. Chem. Phys. 131, 164503 (2009)
https://doi.org/10.1063/1.3251144
Published: October 2009
View article titled, Kinetics of collision-induced reactions between hard-sphere reactants
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Journal Articles

A rigorous foundation of the diffusion-influenced bimolecular reaction kinetics

Ji-Hyun Kim, Sangyoub Lee
Journal: The Journal of Chemical Physics
J. Chem. Phys. 131, 014503 (2009)
https://doi.org/10.1063/1.3158469
Published: July 2009
View article titled, A rigorous foundation of the diffusion-influenced bimolecular reaction kinetics
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Journal Articles

Fabrication of Novel Nanostructures by Sequential Ion Beam Sputtering (abstract)

Ji‐Hyun Kim, Neul‐Bit Ha, J.‐S. Kim
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1119, 224 (2009)
https://doi.org/10.1063/1.3137837
Published: April 2009
View article titled, Fabrication of Novel Nanostructures by Sequential Ion Beam Sputtering (abstract)
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