Electronic structure of CeCoIn5 from angle-resolved photoemission spectroscopy
Electronic structure of CeCoIn5 from angle-resolved photoemission spectroscopy
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DOI：
10.1103/physrevb.79.075104
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发表时间：
2009-02
影响因子：
3.7
通讯作者：
A. Koitzsch;I. Opahle;S. Elgazzar;S. Borisenko;J. Geck;V. Zabolotnyy;D. Inosov;H. Shiozawa;Manuel Richter;M. Knupfer;J. Fink;B. Buechner;Eric D. Bauer;J. Sarrao;R. Follath
中科院分区：
文献类型：
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作者：
A. Koitzsch;I. Opahle;S. Elgazzar;S. Borisenko;J. Geck;V. Zabolotnyy;D. Inosov;H. Shiozawa;Manuel Richter;M. Knupfer;J. Fink;B. Buechner;Eric D. Bauer;J. Sarrao;R. Follath
本文用角分辨光电子能谱和能带计算方法研究了重费米子超导体CeCoIn_{5}$的低能电子结构。我们测量了费米面和能量分布图沿着高对称性方向在$h\ensuremath{\nu}=100\text{ }\text{eV}$和$T=25\text{ }\text{K}$。该化合物具有准二维费米面片，中心位于布里渊区的$M\text{\ensuremath{-}}A$线。带结构的计算已经进行了本地密度近似的$4f$电子已被视为本地化或巡回。我们讨论了比较的实验数据和影响的性质的$4f$电子在给定的温度。
We have investigated the low-energy electronic structure of the heavy-fermion superconductor ${\text{CeCoIn}}_{5}$ by angle-resolved photoemission and band-structure calculations. We measured the Fermi surface and energy distribution maps along the high-symmetry directions at $h\ensuremath{\nu}=100\text{ }\text{eV}$ and $T=25\text{ }\text{K}$. The compound has quasi-two-dimensional Fermi-surface sheets centered at the $M\text{\ensuremath{-}}A$ line of the Brillouin zone. The band-structure calculations have been carried out within the local-density approximation where the $4f$ electrons have been treated either localized or itinerant. We discuss the comparison to the experimental data and the implications for the nature of the $4f$ electrons at the given temperature.