太陽光エネルギー材料研究室 (Solar Energy Materials Laboratory)
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PAPERS :
  1. Pressure-dependent electronic structure of A-site ordered perovskite CaCu3Ti4O12 via X-ray Raman scattering
    Y. Tezuka, H. J. Im, T. Watanabe, H. Ishii, N. Hiraoka, Y. Ishiwata, and H. Yamaoka
    Phys. Rev. B 109, 035132 (2024).
  2. Capacitance characterization of Graphene/n-Si Schottky junction solar cell with MOS capacitor
    M. Teraoka, Y. Ono, H. J. Im
    Mater. Res. Express 10, 085602 (2023).
  3. Thermal annealing effects on graphene/n-Si Schottky junction solar cell: removal of PMMA residues
    Y. Ono and H. J. Im
    Jpn. J. Appl. Phys. 62, 045002 (2023).
  4. Variation of Strong Correlation Effects in A-site Ordered Perovskites CaCu3Ti4−xRuxO12: Photoemission and Inverse Photoemission Studies
    H. J. Im, Masataka Iwataki, Masanori Tsunekawa, Takao Watanabe, Hitoshi Sato, Masashi Nakatake, and Shin-ichi Kimura
    J. Phys. Soc. Jpn. 92, 044701 (2023).
  5. Temperature dependence of the electronic structure of A-site ordered perovskite CaCu3Ti4O12: Angle-integrated and -resolved photoemission studies
    H. J. Im, T. Sakurada, M. Tsunekawa, T. Watanabe, H. Miyazaki, S. Kimura
    Solid State Commun. 298, 113648 (2019).
  6. Growth and Raman spectroscopy of thickness-controlled rotationally faulted multilayer graphene
    H. Kato, N. Itagaki, H. J. Im
    Carbon 141, 76 (2019).
  7. Electronic structure study of CaCu3Ti4O12 by means of X-ray Raman scattering
    Y. Tezuka, Y. Yokouchi, S. Sasaki, S. Nakamoto, K. Nishiyama, M. Mikami, H. J. Im, T. Watanabe, S. Nozawa, N. Nakajima, T. Iwazumi
    J. Electron. Spectrosc. Relat. Phenom. 220, 114 (2017).
  8. Electronic structure of Mott-insulator CaCu3Ti4O12: Photoemission and inverse photoemission study
    H. J. Im, M. Iwataki, S. Yamazaki, T. Usui, S. Adachi, M. Tsunekawa, T. Watanabe, K. Takegahara, S. Kimura, M. Matsunami, H. Sato, H. Namatame, M. Taniguchi
    Solid State Commun. 217, 17 (2015). Fast-track Communication
  9. Fermi Surface Variation of Ce 4f-electrons in Hybridization Controlled Heavy-Fermion Systems
    H. J. Im, T. Ito, H. Miyazaki, S. Kimura, Y. S. Kwon, Y. Saitoh, S.-I. Fujimori, A. Yasui, H. Yamagami
    Solid State Commun. 209-210, 45 (2015).
  10. Strong correlation effects in the A-site ordered perovskite CaCu3Ti4O12 revealed by angle-resolved photoemission spectroscopy
    H. J. Im, M. Tsunekawa, T. Sakurada, M. Iwataki, K. Kawata, T. Watanabe, K. Takegahara, H. Miyazaki, M. Matsunami, T. Hajiri, S. Kimura
    Phys. Rev. B 88, 205133 (2013).
  11. Change of lattice constant due to the hybridization effect of a ferromagnetic semiconductor EuO
    H. Miyazaki, T. Ito, H. J. Im, K. Terashima, T. Iizuka, S. Yagi, M. Kato, K. Soda, S. Kimura
    J. Phys.: Conf. Series. 200, 012124 (2010).
  12. La-doped EuO: A Rare Earth Ferromagnetic Semiconductor with the Highest Curie Temperature
    H. Miyazaki, H. J. Im, K. Terashima, S. Yagi, M. Kato, K. Soda, T. Ito, S. Kimura
    Appl. Phys. Lett. 96, 232503 (2010).
  13. Crystalline electric field effects in Ce 3d core-level spectra of heavy-fermion systems: Hard x-ray photoemission spectroscopy on CeNi1-xCoxGe2
    H. J. Im, T. Ito, S. Kimura, H.-D. Kim, J. B. Hong, Y. S. Kwon
    Phys. Rev. B 79, 193105 (2009).
  14. Direct Observation of Momentum-Dependent Exchange Interaction in a Heisenberg Ferromagnet
    H. Miyazaki, T. Ito, H. J. Im, S. Yagi, M. Kato, K. Soda, S. Kimura
    Phys. Rev. Lett. 102, 227203 (2009).
  15. Single Crystalline Growth and Magnetic, Optical and Photoelectrical Properties of EuO Thin Films
    H. Miyazaki, T. Ito, H. J. Im, K. Terashima, S. Yagi, M. Kato, K. Soda, S. Kimura
    Jpn. J. Appl. Phys. 48,055504 (2009).
  16. First-Principles Local-Density Approximation Study of Electronic Structure in CeCoSi2
    A. Yasui, H. Yamagami, H. J. Im
    J. Phys. Soc. Jpn. 78, 104705 (2009).
  17. Optical properties of the charge-density-wave compound CeTe2
    K. E. Lee, C. I. Lee, H. J. Oh, M. A. Jung, B. H. Min, H. J. Im, T. Iizuka, Y. S. Lee, S. Kimura, Y. S. Kwon
    Phys. Rev. B 78, 134408 (2008).
  18. Optical evidence for a change in the heavy electron Fermi surface at a magnetic quantum critical point of CeNi1-xCoxGe2
    K. E. Lee, C. I. Lee, H. J. Oh, H. J. Im, Tuson Park, S. Kimura, Y. S. Kwon
    J. Phys.: Condens. Matter 20, 285202 (2008).
  19. Direct observation of dispersive Kondo resonance peaks in a heavy-fermion system
    H. J. Im, T. Ito, H.-D. Kim, S. Kimura, K. E. Lee, J. B. Hong, Y. S. Kwon, A. Yasui, H. Yamagami
    Phys. Rev. Lett. 100, 176402 (2008).
  20. Dramatic Change of Optical Properties at a Quantum Critical Point in the Heavy Fermion System CeNi1-xCoxGe2
    Y. Y. Song, K. E. Lee, J. B. Hong, H. J. Im, S. Kimura, Y. S. Kwon
    Infrared Phys. Tech. 51, 485 (2008).
  21. Hybridization gap-open in CeIn3
    C. I. Lee, K. E. Lee, Y. Y. Song, H. J. Im, S. Kimura, Y. S. Kwon
    Infrared Phys. Tech. 51, 488 (2008).
  22. Angle-resolved photoemission study on EuO thin films
    H. Miyazaki, T. Ito, S. Ota, H. J. Im, S. Yagi, M. Kato, K. Soda, S. Kimura
    Physica B 403, 917 (2008).
  23. Magnetic ordering in frustrated Pr5Ni2Si3
    K. E. Lee, H. J. Im, M. H. Jung, Y. S. Kwon
    Physica B 403, 1423 (2008).
  24. Geometrically frustrated magnetic system Ce5-xLaxNi2Si3
    K. E. Lee, H. J. Im, M. H. Jung, Y. S. Kwon
    Physica B 403, 1450 (2008).
  25. Anomaly in Ce1-xGdxCoSi3
    J. B. Hong, N. A. Lee, H. J. Im, M. H. Jung, Y. S. Kwon
    Physica B 403, 911 (2008).
  26. Infrared study on the electronic structure of the alkaline-earth-filled skutterudites AM4Sb12 (A=Sr, Ba; M=Fe, Ru, Os)
    S. Kimura, H. J. Im, T. Mizuno, S. Narazu, E. Matsuoka, T. Takabatake
    Phys. Rev. B 75, 245106 (2007) .
  27. Electronic structure of CeNiGe2-xSix studied by resonant photoemission
    H. J. Im, T. Ito, H. D. Kim, S. Kimura, J. B. Hong, Y.S. Kwon
    J. Magn. Magn. Mater. 310, 411-413 (2007).
  28. Three-dimentional Fermi surface of CeTe2 studied by angle-resolved photoemission
    T. Ito, H. J. Im, S. Kimura, Y. S. Kwon
    J. Magn. Magn. Mater. 310, 431-433 (2007).
  29. Hybridization gap collapse at a quantum critical point of CeNi1-xCoxGe2
    Y. S. Kwon, K. E. Lee, M. A. Jung, E. Y. Song, H. J. Oh, H. J. Im, S. Kimura
    J. Magn. Magn. Mater. 310, 310-312 (2007).
  30. Magnetic-field-induced superconductor-insulator-metal transition in an organic conductor: An infrared magneto-optical imaging spectroscopic study
    T. Nishi, S. Kimura, T. Takahashi, H. J. Im, Y. S. Kwon, T. Ito, K. Miyagawa, H. Taniguchi, A. Kawamoto, K. Kanoda
    Phys. Rev. B 75, 014525 (2007).
  31. BL5U at UVSOR-II for three-dimensional angle-resolved photoemission spectroscopy
    T. Ito, S. Kimura, H. J. Im, E. Nakamura, M. Sakai, T. Horigome, K. Soda, T. Takeuchi
    AIP Conference Proceedings 879, 587-590 (2007).
  32. Iron-Based Heavy Quasiparticles in SrFe4Sb12: An Infrared Spectroscopic Study
    S. Kimura, T. Mizuno, H. J. Im, K. Hayashi, E. Matsuoka, T. Takabatake
    Phys. Rev. B 73, 214416 (2006).
  33. Infrared study on electronic structure of SrT4Sb12 (T = Fe, Ru)
    S. Kimura, H. J. Im, Y. Sakurai, T. Mizuno, K. Takegahara, H. Harima, K. Hayashi, E. Matsuoka, T. Takabatake
    Physica B 383, 137 (2006).
  34. High-resolution photoemission spectroscopy of CeNiGe2 and CeCoGe2
    H. J. Im, T. Ito, S. Kimura, J. B. Hong, Y. S. Kwon
    Physica B 378-380, 825 (2006).
  35. Angle-resolved photoemission study on CeTe2
    T. Ito, H. J. Im, S. Kimura, Y.S. Kwon
    Physica B 378-380, 767 (2006).
  36. Infrared absorption in heavy Fermion system CeNi1-xCoxGe2
    Y. S. Kwon, J. B. Hong, H. J. Im, T. Nishi, S. Kimura
    Physica B 378-380, 823 (2006).
  37. Optical Pseudogap from Iron States in Filled Skutterudites AFe4Sb12 (A = Yb and Ca, Ba)
    J. Sichelschmidt, V. Voevodin, H. J. Im, S. Kimura, H. Rosner, A. Leithe-Jasper, W. Schnelle, U. Burkhardt, J. A. Mydosh, Yu. Grin, F. Steglich
    Phys. Rev. Lett. 96, 037406 (2006).
  38. Continuity of Ce 4f electronic structure across the quantum critical point: A resonant photoemission study on CeNi1-xCoxGe2
    H. J. Im, T. Ito, J. B. Hong, S. Kimura, Y. S. Kwon
    Phys. Rev. B 72, 220405(R) (2005).
  39. Infrared spectroscopy under multi-extreme conditions: Direct observation of pseudo gap formation and collapse in CeSb
    T. Nishi, S. Kimura, T. Takahashi, Y. Mori, Y. S. Kwon, H. J. Im, H. Kitazawa
    Phys. Rev. B 71, 220401(R) (2005).
  40. The origin of the phase separation in partially deuterated k-(ET)2Cu[N(CN)2]Br Studied by infrared magneto-microspectroscopy
    T. Nishi, S. Kimura, T. Takahashi, T. Ito, H. J. Im, Y. S. Kwon, K. Miyagawa, H. Taniguchi, A. Kawamoto, K. Kanoda
    Solid State Commun. 134, 189-193 (2005).
  41. Infrared study on CeSb under high pressures
    S. Kimura, T. Nishi, Y. Mori, Y. Sumida, T. Takahashi, Y.S. Kwon, H. J. Im, H. Kitazawa
    Physica B 359-361, 190-192 (2005).
  42. Electrical and magnetic properties of the new Kondo-lattice compound Ce3Pd4Ge4
    H. J. Im, Y. S. Kwon and M. H. Jung
    Solid State Commun. 124, 181 (2002).
  43. Transport properties in low carrier system CeTe2
    B. H. Min, E. D. Moon, H. J. Im, S. O. Hong, Y. S. Kwon, D. L. Kim and H.-C. Ri
    Physica B 312-313, 205 (2002).
  44. Magnetic and transport properties of the antiferromagnetic dense Kondo lattice system Ce2CuxNi1−xGe6
    H. J. Im, B. H. Min, Y. S. Kwon, D. L. Kim and H.-C. Ri
    Physica B 312-313, 197 (2002).

 

REPORTS :
  1. Temperature Dependent O K Resonant X-ray Emission Spectra of CaCu3Ti4O12
    Y. Tezuka, H. Kamide, H.J. Im, T. Watanabe, N. Nakajima
    Photon Factory Activity Report 2017 #35, 283 (2018).
  2. Temperature Dependent Electronic Structure Study of CaCu3Ti4O12 by Means of X-Ray Raman Scattering
    K. Nishiyama, S. Nakamoto, H. Im, T. Watanabe, S. Nozawa, N. Nakajima, T. Iwazumi, Y. Tezuka
    Photon Factory Activity Report 2016 #34-B, 286 (2017).
  3. Electronic Structure Study of CaCu3Ti4O12 by means of Soft X-ray Raman Scattering
    S. Nakamoto, K Nishiyama, H. Im, T. Watanabe, N. Nakajima, Y. Tezuka
    Photon Factory Activity Report 2015 #33-B, 378 (2016).
  4. Electronic Structure Study of CaCu3Ti4O12 by means of X-ray Raman Scattering
    Y. Yokouchi, M. Mikami, H. Im, T. Watanabe, S. Nozawa, N. Nakajima, T. Iwazumi, Y. Tezuka
    Photon Factory Activity Report 2014 #32-B, 195 (2015).
  5. Electronic Structure Study of CaCu3Ti4O12 by means of X-ray Raman Scattering
    Y. Tezuka, M. Mikami, Y. Yokouchi, H. Im, T. Watanabe, S. Nozawa, N. Nakajima, T. Iwazumi
    Photon Factory Activity Report 2013 #31-B, 323 (2014).
  6. Photoemission study of CaCu3Ru4O12
    H. J. Im, M. Iwataki, M. Tsunekawa, T. Watanabe, M. Matsunami, S. Kimura
    UVSOR Activity Report, 136 (2014).
  7. Angle-resolved photoemission study of CaCu3Ti4O12
    H. J. Im, M. Tsunekawa, T. Sakurada, M. Iwataki, K. Kawata, T. Watanabe, K. Takegahara, H. Miyazaki, M. Matsunami, T. Hajiri, S. Kimura
    UVSOR Activity Report, 100 (2013).
  8. Temperature Dependent Photoemission Spectra of CaCu3Ti4O12
    H. J. Im, T. Sakurada, M. Tsunekawa, K. Kawata, T. Watanabe, H. Miyazaki, S. Kimura
    UVSOR activity report 2011, 90 (2012).
  9. A Photon Energy-Dependent Angle-Resolved Photoemission Study of CaCu3Ti4O12
    H. J. Im, T. Sakurada, M. Tsunekawa, M. Toita, T. Watanabe, K, Takegahara, H. Miyazaki, S. Kimura
    UVSOR activity report 2010, 87 (2011).
  10. Ce 4d-4f resonant angle resolved photoemission studies on quantum criticality in heavy-fermion Ce112 systems
    H. J. Im, H. Miyazaki, T. Ito, S. Kimura, K. E. Lee, Y. S. Kwon
    UVSOR activity report 2009, 96 (2010).
  11. Temperature Depedent Angle-Resolved Photoemission Spectra of La-Doped EuO
    H. Miyazaki, T. Ito, K. Terashima, H. J. Im, S. Yagi, M. Kato, K. Soda, S. Kimura
    UVSOR Activity Report 2008, 91 (2009).
  12. Ce 4d-4f Resonant Photoemission Studies in Ce Dilute Kondo System
    H. J. Im, M. Tsunekawa, H. Miyazaki, T. Ito, S. Kimura, K. E. Lee, J. B. Hong, Y. S. Kwon
    UVSOR Activity Report 2008, 87 (2009).
  13. In Situ Magnetic Circular Dichroism Experiment on Ferromagnetic Semiconductor EuO Thin Films
    H. Miyazaki, T. Ito, K. Terashima, H. J. Im, Y, Takagi, T. Nakagawa, Y. Yamamoto, S. Kimura, S. Yagi, M. Kato, K. Soda, T. Yokoyama
    UVSOR Activity Report 2008, 86 (2009).
  14. Pressure-Dependent Far-Infrared Reflectivity Spectra of CeIn3 at 9K
    T. Iizuka, T. Mizuno, C. I. Lee, K. E. Lee, H. J. Im, Y. S. Kwon, S. Kimura
    UVSOR Activity Report 2008, 94 (2009).
  15. Temperature Dependent Angle-Resolved Photoemission Spectra on Ferromagnetic EuO Thin Films, H. Miyazaki
    T. Ito, S. Ota, H. J. Im, S. Yagi, M. Kato, K. Soda, S. Kimura
    UVSOR Activity Report 2007, 121 (2008).
  16. Evidence of Three-Dimensional CDW Formation on CeTe2
    T. Ito, H. J. Im, S. Kimura, Y. S. Kwon
    UVSOR Activity Report 2007, 125 (2008).
  17. Ce and Gd 4d-4f Resonant Photoemission Studies of Ce1-xGdxCoSi3
    H. J. Im, H. Miyazaki, T. Ito, S. Kimura, J. B. Hong, Y. S. Kwon
    UVSOR Activity Report 2007, 119 (2008).
  18. Momentum-Dependent Kondo Resonance Peaks in a Low-Energy Angle-Resolved Photoemission Spectroscopy
    H. J. Im, T. Ito, H. Miyazaki, S. Kimura, C. I. Lee, K. E. Lee, Y. S. Kwon
    UVSOR Activity Report 2007, 124 (2008).
  19. Infrared Spectroscopy of CeIn3 under a pressure
    T. Iizuka, T. Mizuno, K. E. Lee, H. J. Im, Y. S. Kwon, S. Kimura
    UVSOR Activity Report 2007, 91 (2008).
  20. Construction of a VUV Angle-resolved Photoemission Beamline BL7U, S. Kimura
    T. Ito, M. Sakai, E. Nakamura, N. Kondo, T. Horigome, M. Hosaka, A. Mochihashi, M. Katoh, T. Ejima, H. J. Im, H. Miyazaki, K. Soda
    UVSOR Activity Report 2006, 50 (2007).
  21. Three-Dimensional Angle-Resolved Photoemission Study on EuO thin films
    H. Miyazaki, T. Ito, S. Ota, H. J. Im, S. Yagi, M. Kato, K. Soda, S. Kimura
    UVSOR Activity Report 2006, 111 (2007).
  22. Angle-resolved Photoemission Study of CeCoGe1.2Si0.8 in the Three-dimensional Momentum space
    H. J. Im, T. Ito, S. Kimura, J. B. Hong, Y. S. Kwon
    UVSOR Activity Report 2006, 94 (2007).
  23. Performance of the Three-dimensional VUV Angle-resolved Photoemission Apparatus at BL7U
    T. Ito, S. Kimura, M. Sakai, N. Kondo, T. Horigome, H. Im, H. Miyazaki, K. Soda
    UVSOR Activity Report 2006, 52 (2007).
  24. Three-dimensional angle-resolved photoemission study on SmS
    T. Ito, H. J. Im, A. Chainani, K. Matsubayashi, S. Kimura, H.-D. Kim, K. Imura, H. Suzuki, N. K. Sato
    UVSOR activity report 2005, 99 (2006).
  25. Optical pseudogap from iron states in AFe4Sb12 (A = Yb, Ca, Ba)
    J. Sichelschmidt, H. J. Im, S. Kimura, V. Voevodin, H. Rosner, W. Schnelle, A. Leithe-Jasper, J. A. Mydosh, Yu. Grin, F. Steglich
    UVSOR activity report 2005, 63 (2006).
  26. Electronic structure of CeNiGe2-xSix: Ce 4d-4f resonant photoemission spectroscopy
    H. J. Im, T. Ito, S Kimura, H.-D. Kim, J. B. Hong, Y. S. Kwon
    UVSOR activity report 2005, 98 (2006).
  27. Three-dimensional angle-resolved photoemission study on CeTe2
    T. Ito, H. J. Im, S. Kimura, Y. S. Kwon
    UVSOR activity report 2005, 100 (2006).
  28. Improvement of the SGM-TRAIN Monochromator at UVSOR-II BL5U for Low Excitation Energy Photoemission
    T. Ito, H. J. Im, S. Kimura, E. Nakamura, T. Horigome
    UVSOR activity report 2004, 41 (2005).
  29. Three-Dimensional Band Dispersion of CeTe2
    T. Ito, H. J. Im, S. Kimura, Y. S. Kwon
    UVSOR activity report 2004, 99 (2005).
  30. Ce 4d-4f resonant photoemission spectroscopy on CeNi1-xCoxGe2
    H. J. Im, T. Ito, B. K. Lee, S. Kimura, Y. S. Kwon
    UVSOR activity report 2004, 100 (2005).

 

PRESENTATIONS (International conference) :
  1. H. J. Im, M. Tsunekawa, T. Sakurada, K. Kawata, T. Watanabe, K. Takegahara, H. Miyazaki and S. Kimura
    Electronic structure of A-site ordered perovskite CaCu3Ti4O12 studied by angle-resolved photoemission spectroscopy
    The 19th International Conference on Magnetism with Stronlgy Correlated Electron Systems (SCES), July 8-13, 2012, Busan, Korea.
  2. H. J. Im, Ce 4f electronic structure of heavy-fermion systems across quantum critical point: a resonant angle-resolved photoemission study
    The 2nd GCOE International Symposium, 2010, Sendai.
  3. H. J. Im, Systematic angle-resolved photoemission study of heavy-fermion materials
    11-th International Conference on Electronic Spectroscopy and Structure, 2009, Nara.
  4. H. J. Im, Systematic angle-resolved photoemission study of Ce-based heavy-fermion systems
    2nd International UVSOR Workshop on Low-Energy Photoemission of Solids using Synchrotron Radiation, 2009, Okazaki.
  5. H.J. Im, T. Ito, H.-D. Kim, S. Kimura, K.E. Lee, J.B. Hong, Y.S. Kwon, A. Yasui, H. Yamagami
    Dispersion of Kondo resonance peaks in CeCoGe1.2Si0.8: Ce 4d-4f resonant angle-resolved photoemission
    The International Conference on Strongly Correlated Electron Systems 2008, August 17-22, 2008, Buzios/Rio, Brazil.
  6. H. J. Im, T. Ito, H.-D. Kim, S. Kimura, K. E. Lee, J. B. Hong, Y. S. Kwon, A. Yasui, H. Yamagami
    Direct observation of dispersive Kondo resonance peaks in a heavy-fermion system
    The International Conference on Low-Energy Electrodynamics in Solids 2008, June 30 - July 4, 2008, Vancouver – Whistler, Canada.
  7. H. J. Im, T. Ito, S Kimura, H.-D. Kim, J. B. Hong, Y. S. Kwon
    Electronic structure of CeNiGe2-xSix studied by Ce 4d-4f resonant photoemission
    The 17th International Conference on Magnetism, August 20-25, 2006, Kyoto, Japan.
  8. H. J. Im, T. Ito, S. Kimura, J. B. Hong, Y. S. Kwon
    High-resolution photoemission study of the Ce 4f electron characters in CeNi1-xCoxGe2
    The International Conference on Strongly Correlated Electron Systems 2005, July 26-30, 2005, Vienna, Austria.
  9. H. J. Im, B. H. Min, Y. S. Kwon, D. L. Kim and H.-C. Ri
    Physical properties of the antiferromagnetic dense Kondo system Ce2CuxNi1−xGe6
    The International Conference on Strongly Correlated Electron Systems 2001, July 2001, Michigan, USA.

 弘前大学 理工学部自然エネルギー学科/大学院理工学研究科 任研究室
IM Lab., Department of Sustainable Energy, Faculty of Science and Technology / Graduate School of Science and Technology, Hirosaki University