Fermi surface studies in the magnetic-field-induced superconductor λ − ( BETS ) 2 FeCl 4
Fermi surface studies in the magnetic-field-induced superconductor λ − ( BETS ) 2 FeCl 4
复制标题
磁场感应超导体中的费米表面研究 λ − (BETS) 2 FeCl 4
DOI：
10.1103/physrevb.64.024531
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发表时间：
2001
影响因子：
3.7
通讯作者：
H. Kobayashi
中科院分区：
文献类型：
--
作者：
S. Uji;H. Shinagawa;C. Terakura;T. Terashima;T. Yakabe;Y. Terai;M. Tokumoto;A. Kobayashi;Hisashi Tanaka;H. Kobayashi
Measurements of the Shubnikov\char21{}de Haas (SdH) and angular-dependent magnetoresistance oscillations were performed to study the Fermi surface for a magnetic-field-induced superconductor $\ensuremath{\lambda}\ensuremath{-}(\mathrm{BETS}{)}_{2}{\mathrm{FeCl}}_{4}.$ We found two SdH oscillations ascribed to the minimum and maximum cross-sectional areas of corrugated cylindrical Fermi surface, which are estimated to be $14%$ and $17%$ of the first Brillouin zone, respectively. The mass of the conduction electrons is $4.1 {m}_{0},$ suggesting the enhancement due to many-body effects. Assuming a parabolic energy band, we obtain a Fermi energy of $\ensuremath{\sim}20 \mathrm{meV}$ and an interlayer transfer integral of $\ensuremath{\sim}1 \mathrm{meV}.$
Measurements of the Shubnikov\char21{}de Haas (SdH) and angular-dependent magnetoresistance oscillations were performed to study the Fermi surface for a magnetic-field-induced superconductor $\ensuremath{\lambda}\ensuremath{-}(\mathrm{BETS}{)}_{2}{\mathrm{FeCl}}_{4}.$ We found two SdH oscillations ascribed to the minimum and maximum cross-sectional areas of corrugated cylindrical Fermi surface, which are estimated to be $14%$ and $17%$ of the first Brillouin zone, respectively. The mass of the conduction electrons is $4.1 {m}_{0},$ suggesting the enhancement due to many-body effects. Assuming a parabolic energy band, we obtain a Fermi energy of $\ensuremath{\sim}20 \mathrm{meV}$ and an interlayer transfer integral of $\ensuremath{\sim}1 \mathrm{meV}.$