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Journal Articles

Effect of hydrogenation conditions on the microstructure and mechanical properties of zirconium hydride

Muta, Hiroaki*; Nishikane, Ryoji*; Ando, Yusuke*; Matsunaga, Junji*; Sakamoto, Kan*; Harjo, S.; Kawasaki, Takuro; Oishi, Yuji*; Kurosaki, Ken*; Yamanaka, Shinsuke*

Journal of Nuclear Materials, 500, p.145 - 152, 2018/03

 Times Cited Count:11 Percentile:77.59(Materials Science, Multidisciplinary)

Journal Articles

Conditions on existence of the complex modes in a Bose-Einstein condensate -analytical derivation-

Nakamura, Yusuke*; Mine, Makoto*; Okumura, Masahiko; Yamanaka, Yoshiya*

Soryushiron Kenkyu, 116(2), p.B67 - B69, 2008/06

no abstracts in English

Journal Articles

Condition for emergence of complex eigenvalues in the Bogoliubov-de Gennes equations

Nakamura, Yusuke*; Mine, Makoto*; Okumura, Masahiko; Yamanaka, Yoshiya*

Physical Review A, 77(4), p.043601_1 - 043601_6, 2008/04

 Times Cited Count:18 Percentile:64.33(Optics)

The condition for the appearance of dynamical instability of the Bose- condensed system, characterized by the emergence of complex eigenvalues in the Bogoliubov-de Gennes equations, is studied analytically. It is concluded that the degeneracy between a positive- norm eigenmode and a negative-norm one is essential for the emergence of complex modes. Based on the conclusion, we justify the two-mode approximation applied in our previous work, in which we analytically studied the condition for the existence of complex modes when the condensate has a highly quantized vortex.

Oral presentation

Analysis of the condition of existence of complex modes in the Bogoliubov-de Gennes equations

Nakamura, Yusuke*; Mine, Makoto*; Okumura, Masahiko; Yamanaka, Yoshiya*

no journal, , 

no abstracts in English

Oral presentation

Homoepitaxial growth of $$beta$$-FeSi$$_2$$ single crystal with sputter-etch treatment

Yamaguchi, Kenji; Matsumura, Seidai*; Yamanaka, Yusuke*; Hojo, Kiichi; Udono, Haruhiko*

no journal, , 

no abstracts in English

Oral presentation

Heat-treatment of $$beta$$-FeSi$$_2$$ substrate under Si vapor and homoepitaxy

Matsumura, Seidai*; Yamanaka, Yusuke*; Udono, Haruhiko*; Yamaguchi, Kenji; Esaka, Fumitaka; Hojo, Kiichi

no journal, , 

no abstracts in English

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