利用SlaveBoson平均场理论，我们研究了t-t＇-t-J模型的反铁磁下电子掺杂铜氧化物的化学势、熵和电子比热容．结论表明，在电子掺杂为δ=0．1时，电子比热容和熵有突变现象，即发生了相变．同时，我们也研究了熵随时间的演化关系，结果表明熵是受抑制的．
We have investigated the chemical potential, entropy and the electronic specific heat of electron-doped cuprates on the antiferromagnetism using Slave Boson Mean Field Approach (SBMFA)in thet-t'-t"-J model. It shows that electronic specific heat and entropy have abrupt change around electron doping concentration ( 8 = 0. 1 ), which means the quantum phase transition can occur. In addition, we also discuss entropy and discover that entropy is suppressed.
参考文献
| [1] | Tsuei CC.;Kirtley JR. .Pairing symmetry in cuprate superconductors [Review][J].Reviews of Modern Physics,2000(4):969-1016. |
| [2] | Ando Y.;Segawa K.;Kawata T.;Terasaki I.;Miyamoto N. .Specific-heat evidence for strong electron correlations in the thermoelectric material (Na,Ca) Co2O4[J].Physical Review.B.Condensed Matter,1999(15):10580-10583. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%