"I. Umegaki,H. Tanaka,N. Kurita,T. Ono,M. Laver,Ch. Niedermayer,Ch. R?egg,S. Ohira-Kawamura,Kenji Nakajima,‰Á‘qˆä ˜a‹v","Spinon, soliton and breather in the spin-1/2 antiferromagnetic chain compound KCuGaF6",,"Phys. Rev. B",," 92",," 174412 (1-8)",2015,Nov.
"I. Umegaki,H. Tanaka,T. Ono,M. Oshikawa,Kazumitsu Sakai","Thermodynamic properties of quantum sine-Gordon spin chain system KCuGaF6",,"Phys. Rev. B",," 85",," 144423 (1-9)",2012,Apr.
"T. Amemiya,I. Umegaki,H. Tanaka,T. Ono,A. Matsuo,K. Kindo","Ferromagnetism induced in the anisotropic stacked kagome lattice antiferromagnet Cs2Cu3CeF12",,"Phys. Rev. B",," 85",," 144409 (1-9)",2012,Apr.
"Sonia Sharmin,I. Umegaki,H. Tanaka,T. Ono,G. Tanaka,H. Nojiri,M. Fujisawa,N. Matsumi,M. Tomoo,S. Okubo,H. Ohta,T. Sakurai","Antiferromagnetic resonance modes for the S =1/2 kagome antiferromagnet Cs2Cu3SnF12",,"J. Phys: Conf. Ser.",," 302",," 012011 (1-4)",2011,July
"Y. Mori,T. Goto,I. Umegaki,H. Tanaka","19F-NMR Study on Antiferromagnetic Heisenberg Chain KCuGaF6",,"J. Phys: Conf. Ser.",," 302",," 012012 (1-4)",2011,July
"I. Umegaki,T. Ono,H. Tanaka,M. Oshikawa,H. Nojiri","Elementary excitations and specific heat in quantum sine-Gordon spin chain KCuGaF6",,"Physica E",," 43",," 741-747",2011,Jan.
"I. Umegaki,H. Tanaka,T. Ono,H. Nojiri","Observation of Elementary Excitations of Quantum Sine-Gordon Spin System KCuGaF6 Under High Magnetic Field",,"J. Low Temp. Phys.",," 159",," 60-63",2010,Jan.
"Izumi Umegaki,Hidekazu Tanaka,Toshio Ono,Hidehiro Uekusa,Hiroyuki Nojiri","Elementary excitations of the S=1/2 one-dimensional antiferromagnet KCuGaF6 in a magnetic field and quantum sine-Gordon model",,"Physical Review B","American Physical Society","Vol. 79",," 184401",2009,May
"T. Amemiya,M. Yano,K. Morita,I. Umegaki,T. Ono,H. Tanaka,K. Fujii,H. Uekusa","Partial ferromagnetic ordering and indirect exchange interaction in spatially anisotropic kagome antiferromagnet Cs2Cu3CeF12",,"Phys. Rev. B",,"Vol. 80",,"pp. 100406R (1-4)",2009,