<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta content="text/html;charset=UTF-8" http-equiv="Content-Type"></head><body ><div style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10pt;"><div><br></div><div><span class="size" style="font-size: 16px">Thank you Pietro. I guess you mean one there is one more Kleinman-Bylander (KB) projector in the -n- pseudopotential.</span><br></div><div><span class="size" style="font-size: 16px">Can you kindly give a little more description, so that it will be helpful for me as I am not having a Quantum Mechanics background..</span><br></div><div><br></div><div><span class="size" style="font-size: 16px">Regards,</span><br></div><div><span class="size" style="font-size: 16px">Krishnendu</span><br></div><div><br></div><div><span class="size" style="font-size: 16px">-------------------------------------------------------------------------</span><br></div><div><br></div><pre style="white-space: pre-wrap; color: rgb(0, 0, 0); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">... plus one more KB projector for the 3D channel.
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From: users <<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" target="_blank">users-bounces at lists.quantum-espresso.org</a>> on behalf of Pietro Davide Delugas <<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" target="_blank">pdelugas at sissa.it</a>>
Sent: Thursday, July 2, 2026 14:23
To: Quantum ESPRESSO users Forum <<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" target="_blank">users at lists.quantum-espresso.org</a>>
Subject: Re: [QE-users] Pseudopotential nomenclature: n vs nl
Hello
I don't know exactly; I guess the l stands for low (slightly lower accuracy but more efficient). In any case, in the ps library, all pseudos with the nl label belong to the low collection. The difference is in the inside 🙂 , one uses shorter cutoff radii and can use a smaller ecutrho.
Hope this helps
Pietro
[cid:331543f4-1ab2-424f-ae00-12e174c78926]
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From: users <<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" target="_blank">users-bounces at lists.quantum-espresso.org</a>> on behalf of KRISHNENDU MUKHERJEE <<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" target="_blank">krishnendu.nml at csir.res.in</a>>
Sent: Thursday, July 2, 2026 13:39
To: users <<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" target="_blank">users at lists.quantum-espresso.org</a>>
Subject: [QE-users] Pseudopotential nomenclature: n vs nl
Hello,
Can you kindly let me know the diffternce between the pseudopotentials,
Al.pbe-n-rrkjus_psl.1.0.0.UPF<<a href="https://pseudopotentials.quantum-espresso.org/upf_files/Al.pbe-n-rrkjus_psl.1.0.0.UPF" target="_blank">https://pseudopotentials.quantum-espresso.org/upf_files/Al.pbe-n-rrkjus_psl.1.0.0.UPF</a>> vs. Al.pbe-nl-rrkjus_psl.1.0.0.UPF<<a href="https://pseudopotentials.quantum-espresso.org/upf_files/Al.pbe-nl-rrkjus_psl.1.0.0.UPF" target="_blank">https://pseudopotentials.quantum-espresso.org/upf_files/Al.pbe-nl-rrkjus_psl.1.0.0.UPF</a>>
that is one has nl vs. the other one has n
Thank you,
Regards,
Krishnendu
--
Dr. Krishnendu Mukherjee,
Senior Principal Scientist,
CSIR-NML,
Jamshedpur.
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