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thank u so much!

I am a first year PhD student starting in topological quantum matter, your videos has been extremely helpful in understanding the topic.

HI EXCELLENT EXPLICATION PLEASE YOUR MAIL ADRESS

Is it too much of a simplification to think of it as making the possible area the electron can be in ("orbit"), into a straight line?, and that's what allows for the superconductivity? Or is it cooper pair formation that causes it here or some other mechanism?

excellent

I find it always a bit distracting when the speaker stands behind the text, a normal blackboard would do the job better. We are here to learn something and not to watch an art installation. But I appreciated his energy.

Amazing video

Excellent and precise..Thank you

Thankyou. Excellent

I’ve encountered the Professor before. Genuinely Brilliant Professor

Who is Taurulis

It amazes me that such excellence is offered for free and not one comment.

Very good explanation for the first time I saw an explanation to the surface in calculation. But you may need to lessen the speed ( 0.75) to be clear due to the accent .

Could I have these Fermi arcs below Fermi energy? Could I differentiate between semimetal and topological semimetal in a material without band gap but a little contribution od density of states over Fermi level? What happens if I have these in valence band?

So… stupid question - so what happens if you just print out a moire pattern of the 1.1° twist with electrically conductive ink, and use a high enough frequency to evoke the skin effect?

Don’t have enough schooling to understand most of that, but was really impressed.

I realy enjoyed the lecture. The professor presented ther materials so well. Thank you so much!!!

Awesome 👍

thank you!

where is part 1

I dont understand what you meant by chirality being compensated. If you have two weyl points and the chiral currents flow from one to other, both at the top and the bottom surface, where is the compensation?

Literally a life saver, thank you Weizmann institute :)

Amazing it is really helpful for me.. Thank you! Could you share the lecture slide please?

Wonderful Talk.

Great video

Some students will be fortunate. Thankyou

Thankyou

575 is pretty close to 90248. Thx. Interesting video😊

very nice video....much appreciated!

Thanks, Binghai! This video really helps me to understand the topological crystalline insulator!

aapka bohot bohot dhanyavaad

Thank you for your nice lecture. Could you please explain how can we say, Z2 =0 or 1 in Z2 calculation.

❤ great thanks

oooooooohhhhhhhh!!!! profffesor you got me inspired , iam coming to israel . i love quantum hall effect

Thank you

I think there is a typo starting from 19:14: previously we have {y_e, X_m}=0 & [y_e, y_m] = 0. It suddenly becomes {y_e, X_m}=0 & [y_e, X_m] = 0. For y_e & X_m to commute and anticommute simultaneously, I think that implies X_m*y_e=0....

Well done

Nice

Nice presentation

Thank you so much!!!!

Where can i find these slides

key points: 1. The quantum Hall effect is a remarkable physical phenomenon in which electrons flow in a two-dimensional plane subjected to a perpendicular magnetic field, resulting in unique electrical properties. 2. In the classical Hall effect, the magnetic field causes electrons to accumulate on one side of the sample, creating a Hall voltage perpendicular to the current flow. This leads to a resistivity matrix with both longitudinal and Hall components. 3. Classical physics predicts that the Hall resistivity should be directly proportional to the magnetic field, and the longitudinal resistivity should be independent of it. 4. Quantum mechanics introduces two crucial concepts: the flux quantum (hc/e) and the dimensionless number "nu" (the ratio of electron density to flux quanta). 5. The quantum Hall effect deviates from classical expectations. Instead of a linear relationship, it exhibits quantized steps in the Hall resistivity as a function of magnetic field or nu. 6. These steps are extremely precise, with the resistivity remaining constant to one part in a billion across each step. 7. The most striking feature is that the resistivity values at the steps are quantized to universal values, particularly h/e^2. 8. The quantum Hall effect is observed across various materials and under specific conditions, including low temperatures and strong magnetic fields, making it a universal phenomenon. 9. There are two types of quantum Hall effect: integer values of nu (integer quantum Hall effect) and fractional values of nu (fractional quantum Hall effect). 10. Key differences between these two types include the role of electron-electron interactions and the emergence of fractional excitations in the fractional quantum Hall effect. 11. Research directions in understanding the quantum Hall effect include exploring its underlying physics, implications, mathematical aspects (topology), and potential applications such as quantum computing. 12. Topological states of matter, like topological insulators and superconductors, also exhibit unique properties without the need for magnetic fields. 13. The quantum Hall effect's precision and universality have practical applications, such as calibrating measurement units, and hold promise for future technologies, including topological quantum computing. (if wrong anything, please clarify it)

Very nicely explained.

Very good explanation. Thank you

Great discussion on symmetries!

Excellent Explanation. Question for professor: inversion symmetry is required for Toplogical Insulator?

Thank you so much for this video!

very good lecture, thank you!

This explanation is amazing!

thank you