E-K Diagram

Semiconductor Optoelectronics by Prof. M. R. Shenoy, Department of Physics, IIT Delhi. For more details on NPTEL visit nptel.iitm.ac.in

[@PauloConstantino167]

I am astounded by the greatness of the explanation and the attention to detail. No skipping concepts here. All the best to India!

[@oyepuru]

Thanks 🤘🤞

[@drprabhatkumardubey1809]

Sir you are a great teacher. You explain the toughest part in simple way. It's great!!. It's happened only in india. Greetings to all teachers, researchers and students.

[@WeiCaoAzure]

So helpful! Almost every other devices courses I've attended didn't cover these seemingly basic topics.

[@nilbhd5096]

You are a great teacher! You explained these difficult concepts deeply in simple words. I appreciate your work!

[@francisokello]

I'm so touched by the explanation I jut felt like an E-k diagram

[@uncleroq]

hahahaha bro this is crazy. Man this dude jus saved my life.

[@t_a7923]

😅😂

[@subhajitsarkar3940]

you could link each and every topic so well, it seems like every concept is interrelated. Simply Great!

[@user-kp5gm9jp5v]

This guy is just the best at explaining things!

[@ballerpokez2837]

Despite the accents, he was explaining more clearly than any other lecturers I've seen. Thank you so much!!

[@shinchan-sp5ii]

I was not able to understand this topic from anywhere but this video and way of explaining is so good that made the concept very easy to understand. Thanks sir for your efforts 😊

[@IfteKhairulAlamBhuiyan]

See how a 45mins lecture can accommodate a good range of interesting things!

[@dhrubajyotimandal]

I'm very grateful to you sir. I always come to your lectures whenever the topic is semiconductor physics.

[@deepubhardwaj965]

I am amazed to see the detailed explanation which made it so much easier to understand this troublesome topic😊

[@untold_cambridge]

Such a good mesmerizing methodology professor. Thank you.

[@gauthambekal235]

Sir your lecture was tremendous, respect!

[@baranderya]

this guy is simply awesome!!im listening for my phd defense,just amazing!! thanksss

Same thing here. :) His explanations are just great!

[@freeflyk4511]

really appreciate this lecture , so helpful , love this channel

[@techstuffs267]

very elaborative video sir you have very good skills to make the students understand the concept. Keep it up sir

[@muttarameshchandraprem1478]

Thank You for this video. There is very less material available on the internet with whole information at one place and such a good explanation.

[@samratghosh6667]

Dear Sir, Thank you so much for such a wonderful class. I am truly benefited from this class.

[@ruwanjayakantha7310]

your teaching ability is excellent sir. thank you very much.

[@ThuyPham-gf3ez]

great lecture. Thank you so much!

[@anilpadmanabhan9557]

Fascinating!!...Wow!...thankyou dear Sir!!...:)

[@NaveedAhmadVlogs]

awsome sir thanks alott MAY ALLAH ALWAYS OPEN YOUR WAYS

[@llpqazz]

Great lecture, thanks

[@emilianoalaimo1]

Bravo Proffessor!!, great great. Im doing optoelectronics at buenosaires univ. You helping from India!

[@simonsanchis33]

Amazing! Best teacher ever!!

[@ReinventingEducation]

Thank you Prof. 🏆

[@mohema7083]

Great explanation. Perfect in teaching. Many thanks

[@tanmaydas2799]

Thank you very much, Sir. Really It was a great video.

[@b_107_satyakisaha6]

It's crystal clear in my brain now

[@charankumar5067]

Thanks for your explanation about effective mass sir

[@tales_of_BTS-fan_fics]

What a great explanation 👏👏👏👏. Thankyou sir 😊

[@chuckie5358]

love the intro music

[@yarcas4928]

I was dancing when I listened the intro

[@ShailendraKumar-wf6hi]

Darly Yaritza Castro Cárdenas 😂

[@spideyjuano]

d.. d.. d.. drop the bass

[@tanyajaiswal08]

Such an amazing explanation

[@palanivelun4148]

What a clarity. Great

[@rajatshukla1614]

simply amazing

[@ekalavyain1131]

Excellent lecture.For me this topic was foggy.But now I got some clarity.

[@rinucris9562]

Awesome explanation..

[@rohitshuklasirlearnphysics8589]

Behtareen... Lecture

[@rasikamohottige7364]

Nice Work sir..............

[@AnkitYadav-ts9tt]

great work....thnks

[@astha475]

It was very nice…thank you so much sir

[@kazimd.shahan495]

Thank you Sir, Thank you IIT Delhi

[@eegavamsi9954]

excellent explanation sir

[@vishalkumarmeena5322]

Which book do you prefer Sir?

[@manas0510]

9:08 it is due to tunneling effect shown by electron !

[@ashugoyal2231]

These lectures for bsc msc or what??

[@maheshgauravyadav785]

nice lecture sir thanks!!!

[@yongchaojia4610]

great lecture!

[@wahidurrahman7392]

excellent explanation..

[@PreetiKashyap-bl7om]

Sir plz Electrons in periodic lattice ka vedio download kr do Urgent need h g iss topic ki

[@randomizer1493]

Thank you for the video sir. I wonder how the band lines were drawn on 45:47 ? I am assuming we first draw the repeated zone E-K diagram for the periodic dispersion relation and then we only consider the area of first Brillouin zone? Another way I could think is just plotting the E-K relation and then performing zone folding over "2pi/a" translation? if anyone knows, I would be happy to hear your response. I am new to this, please excuse my brevity and any typos!

[@bhatmusaib8233]

Cause of discontinuties?

[@PoojaGupta-mn8qe]

Extraordinary

[@nisha3632]

well explained

[@shahfahad1854]

Dear sir, How to calculate the effective mass from ek bandstructure

[@pavankumarp4020]

at 38.30, where Prof is clearly mentions that once you know the E vs k relationship, take the second derivative i.e d2E/dk2 and this multiply by 1/h2 and finally take whole inverse.

[@dr.roshanmathew9202]

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[@sneakyarjun9923]

Helo sir i am from Tamil Nadu your teaching are so clear 🙏 But I can't enable to memory for all concept sir you say any tips for me and my friend

[@sahebpal1338]

Sir, how do we choose the bands for semiconductor? I mean, if I say clearly, you have taken valence band is 1st band from bottom and 2nd band from bottom in 20:55. But why not you have taken 2nd band from bottom as valance band and 3rd band as conduction band???

[@anshuldadwal9235]

Valence band is last energy band filled with electrons.... there are bands available below valence band, but they do no participate in conduction as they are deeply seeded, require very high energy to excite....hence last filled level...fermi level ...is taken as valence band ...next band to it will be conduction band...

[@mousumiparvin8674]

can anyone tell why in room temperature for intrinsic Ge (Eg=0.67 ev) Ge has Electronics in CB whereas thermal energy at room temperature=0.025ev.?

[@anamikasrivastava8714]

Thank u sir 👏

[@farizasiddiqua3446]

Thank you !

[@filipebemba1694]

IT HELP ME TO UNDERSTAND ABOUT THIS CLASS

[@vishalkumarmeena5322]

Yo man.

[@vishalkumarmeena5322]

muito boa palestra

[@MN-mj9ok]

Thank you excellent.

[@dhirsingnaik5888]

d.v.naik excellent potential used in teaching and profe ...... work sir

[@souravpan8365]

Excellent

[@videoviewerviewer4107]

Thank you Sir

[@az-5378]

excellent

[@cuteshonuable]

Potential is Periodic, what does that mean?

[@karthikvijayasarathi89]

sonali Garg Always any charge Q present at a particular location will have its influence around a certain area around it in terms of potential Vo. so whenever a electron comes at this point where the potential due to the charge Q is Vo .it experience potential energy . so it varies from point to point based on the distance of the consideration from the charge Q. so potential is periodic means. The electron experiences same potential energy after moving every x distance. where x is the equilibrium distance if atoms in the crystal.

[@alison1183]

I think it means that the potential varies from zero to infinity at the nucleaues. The same for every atom.

[@Gruemoth]

a dead physicist is kept frozen at -273°C he's 0K now

[@notconfirm4492]

What is the physical meaning of k please anyone explain it

[@yashdggjs]

he is starting to tell '' what is the secret of life'' at 39:11

[@mindyourbusiness4440]

isn't k and E related by a fixed relation !! E=(k.h`)^2/2me in fact that's how we calculate the possible electron energies(eigen values) by calculating the possible wave number of the shrodinger equation ! so how come the relation between them is periodic ?!

[@raphaelkharkukhi1780]

Maybe that "k" in your expression is the boltzmann constant and the "k" that he's explaining is the wavenumber. they're two completely different things

[@PhysicsMath]

Here k=n(pi) Or you get the value of berluion zone

[@yadavshivam8155]

Watching after 8 years

[@Angela_Skysub]

22:15 Kittel never told me what is that weird picture in chapter 7...

[@RiantDadra]

best!!

[@prabhakarolichannel9747]

one lecture about psudopotetials and DFT

[@areeshahmad4424]

Thanks from Pakistan

[@yingqiuzhou133]

why E is periodic in K? I cannot understand.

[@karthikvijayasarathi89]

周应秋 wave function is periodic . it's a solution of Schrodinger's equation

[@untold_cambridge]

Schrodinger equation for electrons in bands with E gives discrete solutions and which are so many that it seems like a periodic wave.

[@prabhakarolichannel9747]

im very happy

[@shivjikhanath3586]

sir khu aap mara collage mha nahi tha , I'm not stupid any teachers are , thank you sir

[@pragyakushwaha1286]

very nice sir

[@tuyethuynh9754]

the video image is too poor, you need to fix it more

[@itskb5956]

i skip the adds he skips the physics... you all can surely understand it

[@bidhyasagarpatel294]

Hindi me chahiye

[@theoneandtheonlyjb331]

Crap