Evidence for the existence of Kondo coupled resonant modes in heavy fermions
Evidence for the existence of Kondo coupled resonant modes in heavy fermions
复制标题
重费米子中近藤耦合谐振模式存在的证据
DOI:
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复制
发表时间:
2009
期刊:
影响因子:
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通讯作者:
P. Pagliuso
中科院分区:
文献类型:
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作者:
L. Holanda;J. M. Vargas;C. Rettori;S. Nakatsuji;K. Kuga;Z. Fisk;S. Oseroff;P. Pagliuso
Electron Spin Resonance (ESR) can microscopically probe both conduction electrons (ce) and local moment (LM) spin systems in different materials. A ce spin resonance (CESR) is observed in metallic systems based on light elements or with enhanced Pauli susceptibility. LM ESR is frequently seen in compounds with paramagnetic ions and localized d or f electrons. Here we report a remarkable and unprecedented ESR signal in the heavy fermion (HF) superconductor beta-YbAlB4[1] which behaves as a CESR at high temperatures and acquires characteristics of the Yb3+ LM ESR at low temperature. This dual behavior in same ESR spectra strikes as an in situ unique observation of the Kondo quasiparticles giving rise to a new ESR response called Kondo coupled resonant mode (KCRM). The proximity to a quantum critical point (QCP) may favor the observation of a KCRM and its dual character in beta-YbAlB4 may unveil the 4f-electrons nature at the QCP.
DOI:
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发表时间:
2009
期刊:
影响因子:
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作者:
Ando M;et.al.;E. Saitoh;Tatsuya Higashi;Satoru Nakatsuji
通讯作者:
Satoru Nakatsuji
DOI:
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发表时间:
2006
期刊:
J. Phys. Soc. Jpn. 75
影响因子:
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作者:
Takahiro Maehira;Takashi Hotta;藤井敏之;福井隆裕・初貝安弘;Takashi Hotta;N. Hatakenaka;福井隆裕・初貝安弘;Takashi Hotta and Hisatomo Harima;S. Matsuo;Katsunori Kubo and Takashi Hotta
通讯作者:
Katsunori Kubo and Takashi Hotta