I want to calculate the cross-plane and in-plane transport properties of layered materials using quantum espresso and boltztrap codes. I don't understand how to choose between in-plane and cross-plane transport.
You can extract them from case.condtens, after proper conversion.
In case.condtens there are nine columns are the σ/τ components (3x3 tensor). These are followed by the nine Seebeck components and finally the nine κ0 components.
See user guide : http://blog.sciencenet.cn/home.php?mod=attachment&filename=UserGuide.pdf&id=50364