Effective carrier doping by magnetic field into a pseudogapped state in CeNiSn: A Sn NMR study.
Effective carrier doping by magnetic field into a pseudogapped state in CeNiSn: A Sn NMR study.
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通过磁场将载流子有效掺杂到 CeNiSn 中的赝能隙状态：Sn NMR 研究。
DOI：
10.1103/physrevb.54.6062
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Fujii
中科院分区：
文献类型：
--
作者：
Nakamura;Kitaoka;Asayama;Takabatake;Nakamoto;Fujii
The magnetic field dependence of the spin-lattice relaxation rate 1/{ital T}{sub 1} of {sup 119}Sn in CeNiSn has been measured down to 20 mK in a field range of 0.2{endash}8 T. ({ital T}{sub 1}{ital T}){sup {minus}1} is constant below 1 K, which depends on the external field in such a manner that its value stays constant to 2 T, while it increases linearly with the field up to 8 T. It is shown that this magnetic field dependence of ({ital T}{sub 1}{ital T}){sup {minus}1} is well explained by the simple scenario that the quasiparticle density of states at the Fermi level is produced by the Zeeman splitting of the up- and down-spin bands, keeping its V-shaped gapped structure unchanged for fields less than 8 T. The present experiment has elucidated that CeNiSn is in a semimetallic ground state with a low carrier density and the application of a magnetic field exceeding 2 T turns out to supply effective carriers. {copyright} {ital 1996 The American Physical Society.}
The magnetic field dependence of the spin-lattice relaxation rate 1/{ital T}{sub 1} of {sup 119}Sn in CeNiSn has been measured down to 20 mK in a field range of 0.2{endash}8 T. ({ital T}{sub 1}{ital T}){sup {minus}1} is constant below 1 K, which depends on the external field in such a manner that its value stays constant to 2 T, while it increases linearly with the field up to 8 T. It is shown that this magnetic field dependence of ({ital T}{sub 1}{ital T}){sup {minus}1} is well explained by the simple scenario that the quasiparticle density of states at the Fermi level is produced by the Zeeman splitting of the up- and down-spin bands, keeping its V-shaped gapped structure unchanged for fields less than 8 T. The present experiment has elucidated that CeNiSn is in a semimetallic ground state with a low carrier density and the application of a magnetic field exceeding 2 T turns out to supply effective carriers. {copyright} {ital 1996 The American Physical Society.}