Choi Yong Kwang (Yong Kwang Choi) - マイポータル

基本情報

所属: 旧所属東北大学金属材料研究所磁気物理学研究部門助手

J-GLOBAL ID: 200901024418322041
researchmap会員ID: 5000072011

MISC

Existence of orbital polarons in ferromagnetic insulating La1-xSrMnO3 (0.11 <= x <= 0.14) revealed by giant phonon softening

KY Choi, P Lemmens, T Sahaoui, G Guntherodt, YG Pashkevich, VP Gnezdilov, P Reutler, L Pinsard-Gaudart, B Buchner, A Revcolevschi

PHYSICAL REVIEW B 71(17) 1774402-1774408 2005年5月
Spin gap formation in the quantum spin systems TiOX, X = Cl and Br

P Lemmens, KY Choi, R Valenti, T Saha-Dasgupta, E Abel, YS Lee, FC Chou

NEW JOURNAL OF PHYSICS 7 74 2005年3月
Phonons and magnons in stripe-ordered nickelates. A Raman scattering study

Gnezdilov, V, Kurnosov, V, A Yeremenko, Y Pashkevich, P Lemmens, J Tranquada, KY Choi, G Guntherodt, K Nakajima

LOW TEMPERATURE PHYSICS 31(2) 154-160 2005年2月
Scattering: Inelastic Scattering Technique - Raman

Elsevier Publishers, Amsterdam 2005年
Scattering: Inelastic Scattering Technique - Raman

Elsevier Publishers, Amsterdam 2005年
Random magnetism in the frustrated triangular spin ladder KCu5V3O13

KY Choi, P Lemmens, J Pommer, A Ionescu, G Guntherodt, S Hiroya, H Sakurai, K Yoshimura, A Matsuo, K Kindo

PHYSICAL REVIEW B 70(17) 174417-174422 2004年11月
Giant phonon softening in the pseudogap phase of the quantum spin system TiOCl

P Lemmens, KY Choi, G Caimi, L Degiorgi, NN Kovaleva, A Seidel, FC Chou

PHYSICAL REVIEW B 70(13) 134429-134433 2004年10月
Phonon anomalies in lightly doped manganites La1-xSrxMnO3 (x=0.09 and 0.11) near the CAF/FI phase boundary

K. -Y. Choi, P. Lemmens, G. Guentherodt, Yu. G. Pashkevich, V. P. Gnezdilov, P. Reutler, B. Buechner, A. Revcolevschi

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 272 E305-E306 2004年5月
Magnetic exchange in a low-dimensional complex oxide ((Cu)under-bar, Zn)(2)V2O7

Kataev, V, J Pommer, KY Choi, P Lemmens, A Ionescu, Y Pashkevich, K Lamonova, A Moller, A Freimuth, G Guntherodt

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 272 933-934 2004年5月
Effect of Na content and hydration on the excitation spectrum of the cobaltite NaxCoO2 center dot yH2O

P Lemmens, Gnezdilov, V, NN Kovaleva, KY Choi, H Sakurai, E Takayama-Muromachi, K Takada, T Sasaki, FC Chou, DP Chen …

JOURNAL OF PHYSICS-CONDENSED MATTER 16(11) S857-S865 2004年3月
Coexistence of dimerization and long-range magnetic order in the frustrated spin-chain system LiCu2O2:Inelastic light scattering study

Physical Review B 69 104421-104425 2004年
Coexistence of dimerization and long-range magnetic order in the frustrated spin-chain system LiCu2O2:Inelastic light scattering study

Physical Review B 69 104421-104425 2004年
Interplay between structure and magnetism in the spin-chain compound (Cu,Zn)(2)V2O7

J Pommer, Kataev, V, KY Choi, P Lemmens, A Ionescu, Y Pashkevich, A Freimuth, G Guntherodt

PHYSICAL REVIEW B 67(21) 214410-214420 2003年6月
Raman scattering study of Nd1-xSrxMnO3 (x = 0.3, 0.5)

KY Choi, P Lemmens, G Guntherodt, M Pattabiraman, G Rangarajan, VP Gnezdilov, G Balakrishnan, DM Paul, MR Lees

JOURNAL OF PHYSICS-CONDENSED MATTER 15(19) 3333-3342 2003年5月
Search for quantum criticality in the spin tetrahedra system Cu2Te2O5(BrxCl1-x)(2)

P Lemmens, KY Choi, G Guntherodt, M Johnsson, P Millet, F Mila, R Valenti, C Gros, W Brenig

PHYSICA B-CONDENSED MATTER 329 1049-1050 2003年5月
Spin dynamics in the quantum spin system KCu5V3O13

HH Klauss, P Lemmens, M Birke, D Baabe, D Mienert, FJ Litterst, A Amato, J Pommer, A Ionescu, KY Choi …

PHYSICA B-CONDENSED MATTER 326(1-4) 436-439 2003年2月
Longitudinal magnon in the tetrahedral quantum spin system Cu2Te2O5Br2 near quantum criticality

Physical Review B 67 174405-174409 2003年
Strong anharmonicity and spin-phonon coupling in the quasi-two-dimensional quantum spin system SrBaxCu2(BO3)2

Physical Review B 68 104418-104426 2003年
Spin dynamics of the spin dimer system TlCuCl3 probed by Raman spectroscopy

Physical Review B 68 174412-174417 2003年
Longitudinal magnon in the tetrahedral quantum spin system Cu2Te2O5Br2 near quantum criticality

Physical Review B 67 174405-174409 2003年

もっとみる

書籍等出版物

Phonons and Magnons in La5/3Sr1/3NiO4 single crystal

Kluwer Academic Publishers 2004年
Raman studies of single and polycrystalline cobalities GdBaCo2O5+d with d close to 0.5

Kluwer Academic Publishers 2004年
Giant phonon softening in ferromagnetic LaMnO3+d

Kluwer Academic Publishers 2004年
Phonons and Magnons in La5/3Sr1/3NiO4 single crystal

Kluwer Academic Publishers 2004年
Raman studies of single and polycrystalline cobalities GdBaCo2O5+d with d close to 0.5

Kluwer Academic Publishers 2004年
Giant phonon softening in ferromagnetic LaMnO3+d

Kluwer Academic Publishers 2004年

共同研究・競争的資金等の研究課題

強磁場ラマン分光を用いたオ―ビトンの研究

科学研究費補助金 2005年 - 2006年
Investigation of orbitons using high-field Raman spectroscopy

Grant-in-Aid for Scientific Research 2005年 - 2006年