STUDY ON SCATTERING OF CONDUCTION ELECTRONS FOR SPIN-FLUCTUATION MEDIATED SUPERCONDUCTOR VIA dHvA EFFECT
基于dHvA效应的自旋涨落介导超导体传导电子散射研究
基本信息
- 批准号:15540327
- 负责人:
- 金额:$ 2.37万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2003
- 资助国家:日本
- 起止时间:2003 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Scattering lifetime and effective mass of the conduction electrons for the spin-fluctuation mediated superconductor have been investigated by the de Haas-van Alphen (dHvA) effect. We selected typical compounds ZrZn_2 and CeIn_3 for the itinerant ferromagnet and magnetically ordering heavy Fermion system, respectively, both showing the unconventional superconductivity.Pressure study of dHvA effect on ZrZn_2 revealed"nested"ferromagnetic pressure-magnetic field phase diagram being similar to that of UGe_2. However, no significant changing of the scattering lifetime and the effective mass across the phase boundary was observed in ZrZn_2. Such a feature is different from that of UGe_2 in which drastic changing of the effective mass is observed. These results suggest that the conduction electron is more sensitive for the spin fluctuation through the felectron than the d-electron.vThe dHvA frequency and the effective mass of CeIn_3 change in behavior at distinct four pressures. These successive evolutions of the conduction electron properties are quite different from the sudden changes of them observed in sister compound CeRh_2Si_2. Although most of unconventional superconductors mediated by spin-fluctuation seem to possess a similar phase diagram, precise properties of conduction electrons are characteristic for each compound.
利用de Haas-van Alphen(dHvA)效应研究了自旋涨落介导超导体的散射寿命和传导电子的有效质量。我们选取了具有非常规超导性的典型化合物ZrZn_2和CeIn_3分别作为巡游铁磁体和磁有序重费米子系统的材料,通过对ZrZn_2的dHvA效应的压力研究,发现了类似于UGe_2的“嵌套“铁磁压-磁场相图。而ZrZn_2的散射寿命和有效质量没有明显的变化。这一特征与UGe_2的有效质量剧烈变化的特征不同。这些结果表明,传导电子对通过f电子的自旋涨落比d电子的自旋涨落更敏感。CeIn_3的dHvA频率和有效质量在不同的四种压力下有不同的变化。这些连续的传导电子性质的演变与在姊妹化合物CeRh_2Si_2中观察到的传导电子性质的突然变化是完全不同的。虽然大多数由自旋涨落介导的非常规超导体似乎具有相似的相图,但传导电子的精确性质是每个化合物的特征。
项目成果
期刊论文数量(56)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
de Haas-van Alphen effect in ZrZn_2 under pressure : Crossover between two magnetic states
压力下 ZrZn_2 中的德哈斯-范阿尔芬效应:两种磁态之间的交叉
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:T.Isshiki et al.;K.Umeo et al.;T.Matsumura et al.;T.Yamamizu et al.;M.Nakayama et al.;N.Kimura et al.
- 通讯作者:N.Kimura et al.
dHvA effect and superconductivity of MgB_2 detected by AC torque method down to the fields below H_<c2>
交流扭矩法检测到H_<c2>以下场的MgB_2的dHvA效应和超导性
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:T.Isshiki et al.;K.Umeo et al.;T.Matsumura et al.;T.Yamamizu et al.;M.Nakayama et al.;N.Kimura et al.;M.Endo et al.;T.Isshiki et al.
- 通讯作者:T.Isshiki et al.
Fermi surface studies of the ferromagnetic superconductor UGe_2 under high pressure
高压铁磁超导体UGe_2的费米面研究
- DOI:
- 发表时间:2003
- 期刊:
- 影响因子:0
- 作者:T.Yamamizu;et al.;T.Terashima et al.
- 通讯作者:T.Terashima et al.
Electronic structures of PrPb_3 in the para-and antiferroquadrupolar phases
PrPb_3 对位和反铁四极相的电子结构
- DOI:
- 发表时间:2003
- 期刊:
- 影响因子:0
- 作者:T.Yamamizu;et al.;T.Terashima et al.;M.Endo et al.;M.Endo et al.;S.Nakamura et al.;S.Nakamura et al.;J.Nakamura et al.;S.Nakamura et al.;M.Endo et al.
- 通讯作者:M.Endo et al.
Evolution of spin and field dependences of the effective mass with pressure in CeIn_3
CeIn_3 中有效质量的自旋和场依赖性随压力的演变
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:T.Isshiki et al.;K.Umeo et al.;T.Matsumura et al.;T.Yamamizu et al.;M.Nakayama et al.;N.Kimura et al.;M.Endo et al.;T.Isshiki et al.;M.Nakayama et al.;M.Endo et al.
- 通讯作者:M.Endo et al.
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OCHIAI Akira其他文献
OCHIAI Akira的其他文献
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{{ truncateString('OCHIAI Akira', 18)}}的其他基金
Research on Ground State and Phase Transition of Quantum Spin System in Rare Earth Compound
稀土化合物中量子自旋体系的基态和相变研究
- 批准号:
20340083 - 财政年份:2008
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Effects of anti TNF α antibody (infliximab) plus MTX on SCID-HuRAg-pit model
抗TNFα抗体(英夫利昔单抗)联合MTX对SCID-HuRAg-pit模型的影响
- 批准号:
17591600 - 财政年份:2005
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Research on Degree of Localization off-electrons in Uranium Monopnictides and Moncharcogenides
铀一元化合物和二元化合物离电子局域化程度的研究
- 批准号:
06640464 - 财政年份:1994
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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