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zhangliping_77

木虫 (初入文坛)

[求助] 请大家帮我看一下我能带计算结果是否合理

请大家帮我看一下我能带计算结果是否合理?

请大家帮我看一下我能带计算结果是否合理
我的计算结果.jpg


请大家帮我看一下我能带计算结果是否合理-1
文献结果.jpg
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孙远慧

木虫 (小有名气)

引用回帖:
5楼: Originally posted by 孙远慧 at 2015-01-17 14:44:55
你算的带隙不一致,但是相当于这里的形状基本上差不多。 因为你把横坐标变成比较大的就行

额给这么多金币都不好意思了,你的结果基本上能吻合的差不多了  ,只是gap的值相差了一些,但是截断能确实相差的有点大,你的软件我不太清楚 ,但是试着提高一下截断能,并且增加一下k点你的能带图能更平滑点。如果想和文献里一样的宽度的话 你双击originband图的空白处 弹出来的对话框里面有调的

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8楼2015-01-17 21:57:46
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y1ding

铁杆木虫 (著名写手)

至少你得说明你是什么软件,设置什么,
文献又是如何(说不清的,直接给出文献名称)
才能判断合不合理.
2楼2015-01-16 13:48:41
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zhangliping_77

木虫 (初入文坛)

文献中
The structural and electronic properties  are investigated using the first-principles pseudopotential method as implemented in the ABINIT code. The Brillouin zones are sampled with a 10 × 1 × 8 Monkhorst-Pack k mesh. The cutoff energy for the plane-wave expansion is set to be 800 eV. For the structural relaxation, the exchange-correlation energy is in the form of Perdew-Burke-Ernzerhof (PBE) with generalized gradient approximation (GGA). Both the geometries and atomic positions are fully relaxed until the force acting on each atom is less than 0 .5 × 10−3eV/˚A. In the calculations of the electronic structures, the Tran-Blaha modified Becke-Johnson (TB-mBJ) potential [25 ]isused, which can reproduce accurate band gaps for many semi-conductors.
我的计算:
用castep
The Brillouin zones are sampled with a 8 × 2× 5 Monkhorst-Pack k mesh. The cutoff energy for the plane-wave expansion is set to be 180 eV. For the structural relaxation, the exchange-correlation energy is in the form of Perdew-Burke-Ernzerhof (PBE) with generalized gradient approximation (GGA). Both the geometries and atomic positions are fully relaxed until the force acting on each atom is less than 0.03eV/˚A.
3楼2015-01-16 14:43:53
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jpchou

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4楼2015-01-16 17:19:58
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