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Unified Description on Behavior of Lyapunov Exponent for 1-D Anderson Model Near Band Center
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作者 De-Long Feng Kai Kang +1 位作者 Shao-Jing Qin chui-lin wang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2019年第4期463-467,共5页
We investigate the behavior for the Lyapunov exponent around the band center in one-dimensional Anderson model with weak disorder. Using a parametrization method we derive the corresponding differential equation and s... We investigate the behavior for the Lyapunov exponent around the band center in one-dimensional Anderson model with weak disorder. Using a parametrization method we derive the corresponding differential equation and solve the associated invariant distribution. We obtain the coeffcient for the leading correction term for small energy in band center anomaly. A high precision Pade′ approximation formula is applied to fully amend the anomalous behavior of Lyapunov exponent near band center. 展开更多
关键词 ANDERSON model DISORDER system BAND CENTER ANOMALY
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Properties of Single-Layer Boron Sheets: First-Principle Study through MatCloud Platform
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作者 Zong-Guo wang Xiao-Yu Yang +1 位作者 Shao-Jing Qin chui-lin wang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2017年第7期125-130,共6页
Electronic structures in two kinds of boron structures are investigated by the first-principle density func- tional theory (DFT) calculations. One structure is from theoretical prediction, and the other is from expe... Electronic structures in two kinds of boron structures are investigated by the first-principle density func- tional theory (DFT) calculations. One structure is from theoretical prediction, and the other is from experimental in- vestigation. Binding energy calculations suggest that the boron structure designed from theory is more stable than that made by experiment. Elastic constants calculations show that both structures are mechanically stable. The electronic structure results show that the theoretical designed structure exhibits semi-metal behavior, while the other structure exhibits metMlic character. No magnetic phenomenal is discovered from them. All the calculations are carried out by the first principles calculation through the MatC1oud platform, which is developed by our research group. 展开更多
关键词 first principles Boron monolayer structure electronic properties MatCloud
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