通过第一性原理计算，我们研究了LaOMnSe的结构、电子性质和磁性质．我们发现LaOMnSe在11点附近存在三个类空穴费米面，在M点附近有两个类电子费米面．如果将类空穴费米面平移（π，π，O），则类空穴费米面就会和类电子费米面在很大程度上重叠，这种费米面嵌套将会导致磁不稳定性和自旋密度波（SI）、V），和LaOFeAs的性质很相似，这主要是因为LaOMnSe的结构和LaOFeAs的很相似，LaOMnSe有望通过电子掺杂或空穴掺杂成为超导体．
By the first-principles calculations, we studied the structure, electronic and magnetic properties of LaOMnSe. there are three hole-like Fermi surfaces around P -point and two electron-like Fermi surfaces around M- point. The hole-like Fermi surfaces will strongly overlap with electron-like Fermi surfaces if they are shifted by the q vector （π,π,O）. Such Fermi surfaces nesting will induce magnetic instability and spin density wave （SDW）, which is similar toLaOFeAs. Because of so much similarity to LaOFeAs, LaOMnSe isexpected to become superconductor with electron or hole doping.
参考文献
| [1] | Kamihara Y;Watanabe T;Hirano M;Hosono H .Iron-based layered superconductor La[O1-xFx]FeAs (x=0.05-0.12) with T-c=26 K[J].Journal of the American Chemical Society,2008(11):3296-3297. |
| [2] | Ren ZA;Lu W;Yang J;Yi W;Shen XL;Li ZC;Che GC;Dong XL;Sun LL;Zhou F .Superconductivity at 55K in iron-based F-doped layered quaternary compound Sm[O1-xFx]FeAs[J].Chinese physics letters,2008(6):2215-2216. |
| [3] | Wang, XC;Liu, QQ;Lv, YX;Gao, WB;Yang, LX;Yu, RC;Li, FY;Jin, CQ .The superconductivity at 18 K in LiFeAs system[J].Solid State Communications,2008(11/12):538-540. |
| [4] | de-la-Cruz C;Huang Q;Lynn JW;Li J;Ratcliff-W 2nd;Zarestky JL;Mook HA;Chen GF;Luo JL;Wang NL;Dai P .Magnetic order close to superconductivity in the iron-based layered LaO1-xFxFeAs systems.[J].Nature,2008(7197):899-902. |
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