Electron Band Theory of Solids

[@alirezasadeghifar3815]

I love how carefully and correctly your words are selected and put in order to explain difficult concepts in an easy way!! Could you also please explain in a separate video what Brillouin zone is?

[@ilTuboDiRiki]

your way of speaking i so hypnotic and your lectures are so easy to understand! Thank you from Italy!

[@gaprilis]

Thanks for occupying my knowledge gaps. :)

[@mayankrawat14]

+gaprilis HAahhah

[@fawadmirza.]

MaYank Rawat veery nice

[@blahmonster1234]

Whoa, this guy is a great teacher. Make more videos, dude!

[@AKLECTURES]

blahmonster1234 thanks! will do :)

[@ManojKumar-el9bq]

awesome!!! i wish he could start a Q/A blog or something to clear doubts.

[@dhananjaysguitarcovers9296]

I seriously love this guy! keep up the good videos

[@slackbabo3858]

You have a great lecturing voice thank you for taking the time to make this

[@aimansaif2936]

Really a superb lecture 👍 nice presentation 👌 good accent 👏👏

[@GodzillaGoesGaga]

Thankyou for this lecture. This is the knowledge I was mising that's been ill explained by others.

[@taduong337]

Thank you for your very clear explanation

[@낮말새상현]

DANG!! Such a great lecture with great substance and depth!! thx! sincerely! from a physics major in South Korea

[@antoineg10]

I love this guy's accent.

[@AKLECTURES]

+Antoine Gremaud Thanks Antoine! :)

[@markomarrindudarin3950]

+Antoine Gremaud If anyone is interested in electronics the greatest results that ive had was by following the Gregs Electro Blog (just google it) definately the most useful course that I have ever tried.

[@dawn-of-newday]

couldn't agree more

[@dawn-of-newday]

i found him delightful

[@ayushjakhmola7881]

wow , it was marvelous , i was unable to find any good video on this topic, and i also love the way he taught in very short manner ,keep it up man , may god be with you

[@mayankrawat14]

Quantized explanation from the basics ....!! GOOD JOB ak

[@namanhtran53]

2020 and still helping me going through Basic of Materials II. Thank you Sir

[@SaeedKhan-jl7hy]

Mashallah Sir Very good video.. Respectfull u from Pakistan

[@mehdi9431]

thank you for your clear explanation

[@SLfromknifetown]

BIG thanks! I've been wanting to learn about band theory for a while, and never imagined to get such a thought out explanation as this one. This answers so many questions, and raises other - I love it! I'm certain this is gonna help me whenever we encounter band theory in class. So yeah, good job and thanks :)

[@i7love7football]

Just came across this great video! Awesome channel!

[@feiwang9892]

Awesome man!!! U explain so well!! And I like the loud and clear pronunciation so much! 👍

[@kanzaahmedchandio4348]

Smoothly and clearly explained! Thanks!

[@k.a9090]

Thanks!! your videos are AWESOME!!

[@aroz945]

I lost it when the electrons split ;-;

[@FilbertCort]

A masterful explanation. As always

[@andreeuricomorais]

Dude, you're a great teacher! Impossible to not understand what you're explaining. Thanks for the video.

[@SleepycoasterOrigamiUnicorn]

Nice work, that was a very clear review.

[@AKLECTURES]

AquariusCyclone thanks! :)

[@ashwinvenkat1239]

Question 1: You said something about Heisenberg uncertainty principle that it reduced energy and made the molecule stable..can u explain that how? Question 2:If the electrons in metal gain external energy,it overcome potential barrier & fermi level and take part in conduction.then why metal becomes superconductors at near absolute zero temp as there is no external energy given at low temp?? Pls clarify my doubts

[@saurabhsuman8522]

you are best guide.

[@8964373]

Hey this is really good!

[@francescoapg]

Great video

[@stnxxxr5370]

Thank you for the great lecture.

[@NabaaYousif0_1]

thank you I appreciate your videos

[@El-vl5ii]

Wow. This is damn good especially bc i can write it all down, then listen, then annotate.

[@delvairdiniz5961]

Excellent! Thanks for the class! 😃

[@yuriyfazylov5506]

Do a video on organic semiconductors. I'd love to see your take on this concept.

[@evasigala7391]

great lecture, just one question.. isn't the number of atomic orbitals supposed to be equal to the number of molecular orbitals? it seems as if for the case of the 1s and 2p the two orbitals you mentioned in your example you designed four.. or are those just the electrons? in that case shouldn't the energy of the lowest 1s electron and 2p electron be equal?

[@sahilgupta5420]

thanks for clearing my concept

[@mayankrawat14]

+SAHIL GUPTA Yhi to difference hai , !!!

[@prateekgurjar1651]

kya?

[@deepaknimbalkar1600]

nicely explained sir

[@patriqk0909]

Thanks! It very helped for the comprehension.

[@jamesoyim8207]

This is great 👍

[@ashishpausker5000]

Ty sir...it helped alot to undrstand

[@lisaregler7357]

I love your videos! Thanks a lot!

[@ramanbalasubramanian2494]

Sir but when the atoms approach each other I think would have a band of energy levels in 2p and 1s orbitals because at different positions of the orbital the electron would have different energies due to different distances from the atom.Pls clarify my doubt

[@nurfarhani4242]

Your lecture is very helpful! Thank you very much :D

[@farahbasaric317]

Why do these bands start splitting again if we reduce the distance between atoms even more?

[@juhokaskisola]

dude you are interesting teacher! students learn faster and they want to learn electron theory! this is what i want from my teacher i mean the way how you teach :)

[@AKLECTURES]

juho kaskisola thanks!! glad to hear that :)

[@JonnhyW]

Thanks for the explanation! very helpful.

[@divyaanshupanwar384]

thanks a lot buddy. Got a lot of my concepts clear. Cheers!

[@পদার্থবিজ্ঞান-চ৯হ]

Very Nice...

[@unnikrishnanms3431]

Can u give an explanation about brillouin zones and reason for bragg diffraction

[@srimusic5316]

Thank you

[@BongboBongbong]

I don't understand where these "splits" (4:26) come from or what it means for orbitals to "split energies" (2:03). Same thing with: "When the 1s and 2p orbitals overlap, they both separate into two energy quantum states". Anyone? Thanks in advance.

[@ipv2000]

Jelto Poté check MO theory.

[@anitachen-fq3eo]

Are the electrons with energies close to the Fermi energy (and therefore able to escape) the valence electrons? Thanks for the video

[@dawn-of-newday]

1s it could be hydrogen or helium . and 2s boron to neon right

[@finite2500]

Nice vid and effort! It seems you have been thinking a bit about how to present, and put a lot of effort into clear speech. If I may be so bold, I would suggest putting in a few pauses to underline specific points you make in the presentation, just to let the audience take in the material. This is usually why students prefer a lecturer to write on the blackboard, otherwise it is simply going too fast for most people. In a video presentation this is not really a problem of course, as you can pause. Also adding a few physical elements might make your presentations a bit more lively. For example, Professor Walter Lewin is an expert at this kind of "entertainment" for his audience, and his video's hits on-line reflects this. It makes the presentation and topic more memorable. I only give you my feedback on this because you seem to want to go somewhere with presenting/teaching. So anyway, great video, and thank you!

[@AKLECTURES]

finite :-)

[@sivonparansun]

OH my contrast! the video feed is so bright

[@sivonparansun]

+chris s BTW awesome explanation. Really cleared it up for me Question though: in the graphs what type of energy is on the y axis (potential or kinetic)?

[@mattbartlett3049]

Where can I find more information on why the 1s and 2p orbitals split when in close proximity? Cheers

[@basudebbarikbarik9813]

Thanks sir

[@cemisgezeksakini406]

great video !

[@Sujith_Kunnini]

why are the bands deeper in the well more wider in energy?

[@sacripantee]

well actually it should be the other way around [the width is set by the overlap between nearby orbitals and orbitals deep in the well are more localized]

[@ayushanand6237]

sir thank you for the video but can you please descride how this band theory explains the electrical conductivity , thermal conductivity and lustre of a metal

[@gouthamuttarkar5177]

Thanks sir I teach awesome

[@hashemsaaed4929]

thank you bro

[@kabandajamir9844]

Thanks so nice

[@Ishuraza1]

Keep going on

[@sugarlaura22]

great vid, thanks

[@namankhullar2400]

the graph on the left side is wrong instead it should be drawn as a mirror image as distance increases then overlapping decreases

[@musclelovers2761]

is this aplicable to compound semiconductors

[@abdulazeem1928]

Hello AK, for a college class 12 project i used your set of videos on electron band theory for a portion of my research into the science behind semiconductors i made chemically. How would I reference your videos? Thanks

[@yiiyatschan1395]

Thanks for the vid!

[@marchans-christianpiech3297]

Great explanation, thanks a lot :)

[@MCRROCKS092]

Thank you!

[@AKLECTURES]

Allison Arabelo You're welcome Alison!

[@scooprussell930]

If my interpretation is correct in a metal crystal an xray should start to bend around the deeper wells of the individual atom.

[@scooprussell930]

In addition there should be additional banding as the xrays are refracted off the deeper wells up too the fermi level. Is this a correct assumption? Just curious.

[@syw0112]

nice video !!!

[@rav2n]

why does this split occur?

[@NishantjonyJaiswal]

very nice.

[@AKLECTURES]

Nishant Jaiswal thanks!

[@karbzblaire8724]

SOME HELP PLIZZ.....what is the 2p and 1s he is talking about

[@marijatkalcevic2731]

thanks!

[@youssefrefaat1594]

Hey sir, is this related to the molecular orbital theory in chemistry?

[@ipv2000]

youssef refaat yes i do believe so

[@youssefrefaat1594]

Hey, I did some research on this topic recently. I found that MO theory is related to the EB theory. When an orbital splits into two orbitals (according to the EB theory) , one of them is called bonding orbital and another one is called non-bonding orbital (according to the MO theory)

[@mrmadmaxalot]

Thanks for coming back to explain that. :)

[@31y7e1my97]

Wow thanks man

[@mohammadhosseinsobhani2929]

Hii , Nice and Accurate lecture :)

[@alejandroalvarez6245]

Excellent ... Thanks :-)

[@hussainvlog3354]

from iraq salam alekm

[@dawn-of-newday]

didn't the p orbital should be bow tie shaped huh ?

[@umayrpkhassan]

Figure 1 and 2 ...

[@alexuntitled9235]

+1\2 at p and -1\2 at s???? A MOLECULE? WHAT???

[@valliravisankar5354]

7:16 Arrival of the cops at his place !! xD

[@frederickshyu8819]

That's is not what I've seen on book

[@HarshSingh-eg6rv]

U pronounce every word so clearly😅

[@AudiOoOoable]

wut..

[@EdyIggs9790]

Mmm...stick teaching just biochemisty

[@1091Floyd21]

Why is he shouting?