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.
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 😊
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!
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.
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???
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...
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.
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 ?!
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
I am astounded by the greatness of the explanation and the attention to detail. No skipping concepts here. All the best to India!
Thanks 🤘🤞
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.
So helpful! Almost every other devices courses I've attended didn't cover these seemingly basic topics.
You are a great teacher! You explained these difficult concepts deeply in simple words. I appreciate your work!
you could link each and every topic so well, it seems like every concept is interrelated. Simply Great!
This guy is just the best at explaining things!
9:08 it is due to tunneling effect shown by electron !
I'm so touched by the explanation I jut felt like an E-k diagram
hahahaha bro this is crazy. Man this dude jus saved my life.
😅😂
I'm very grateful to you sir. I always come to your lectures whenever the topic is semiconductor physics.
See how a 45mins lecture can accommodate a good range of interesting things!
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 😊
this guy is simply awesome!!im listening for my phd defense,just amazing!! thanksss
Same thing here. :) His explanations are just great!
I am amazed to see the detailed explanation which made it so much easier to understand this troublesome topic😊
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.
very elaborative video sir you have very good skills to make the students understand the concept.
Keep it up sir
Bravo Proffessor!!, great great. Im doing optoelectronics at buenosaires univ. You helping from India!
It's crystal clear in my brain now
Sir your lecture was tremendous, respect!
Thank you Prof. 🏆
Such a good mesmerizing methodology professor. Thank you.
love the intro music
I was dancing when I listened the intro
Darly Yaritza Castro Cárdenas 😂
d.. d.. d.. drop the bass
Great lecture, thanks
What a great explanation 👏👏👏👏. Thankyou sir 😊
What a clarity. Great
your teaching ability is excellent sir. thank you very much.
really appreciate this lecture , so helpful , love this channel
Dear Sir, Thank you so much for such a wonderful class. I am truly benefited from this class.
awsome sir thanks alott MAY ALLAH ALWAYS OPEN YOUR WAYS
Amazing! Best teacher ever!!
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
Thank you Sir, Thank you IIT Delhi
simply amazing
Great explanation. Perfect in teaching.
Many thanks
great lecture. Thank you so much!
Watching after 8 years
Thank you very much, Sir. Really It was a great video.
Fascinating!!...Wow!...thankyou dear Sir!!...:)
Excellent lecture.For me this topic was foggy.But now I got some clarity.
best!!
he is starting to tell '' what is the secret of life'' at 39:11
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!
Behtareen... Lecture
Such an amazing explanation
Thanks for your explanation about effective mass sir
Nice Work sir..............
excellent explanation..
Metals have band gap?
Dear sir,
How to calculate the effective mass from ek bandstructure
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.
ua-cam.com/video/_SuQYMgdS3I/v-deo.html
great work....thnks
Thank u sir 👏
a dead physicist is kept frozen at -273°C he's 0K now
Excellent
Cause of discontinuties?
Awesome explanation..
It was very nice…thank you so much sir
22:15 Kittel never told me what is that weird picture in chapter 7...
great lecture!
Which book do you prefer Sir?
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???
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...
Sir plz
Electrons in periodic lattice ka vedio download kr do
Urgent need h g iss topic ki
Extraordinary
excellent explanation sir
well explained
These lectures for bsc msc or what??
IT HELP ME TO UNDERSTAND ABOUT THIS CLASS
Yo man.
muito boa palestra
Thank you !
nice lecture sir thanks!!!
Potential is Periodic, what does that mean?
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.
I think it means that the potential varies from zero to infinity at the nucleaues. The same for every atom.
Thank you Sir
Thank you excellent.
d.v.naik excellent potential used in teaching and profe ...... work sir
excellent
Thanks from Pakistan
❤
sir khu aap mara collage mha nahi tha , I'm not stupid any teachers are , thank you sir
one lecture about psudopotetials and DFT
the video image is too poor, you need to fix it more
im very happy
What is the physical meaning of k please anyone explain it
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.?
very nice sir
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 ?!
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
Here k=n(pi)
Or you get the value of berluion zone
why E is periodic in K? I cannot understand.
周应秋 wave function is periodic . it's a solution of Schrodinger's equation
Schrodinger equation for electrons in bands with E gives discrete solutions and which are so many that it seems like a periodic wave.
i skip the adds he skips the physics... you all can surely understand it
Hindi me chahiye
Crap