Seminarium Fizyki Materii Skondensowanej

Propagation of the single hole introduced into the antiferromagneticground state is one of the most studied problems in "cuprate physics",for it can be solved in a relatively controlled manner. Recently arenewed interest into this topic has been triggered by the possibilityof simulating hole-doped antiferromagnets in the cold atom experiments.In this talk I would like to discuss some of our most recent studieson the propagation of the single hole in the antiferromagnet using themagnon language with a special attention paid to the interactionbetween the magnons. To this end, I will introduce an intuitivepicture which explains why the electron's spin and charge degrees offreedom can separate in a one-dimensional lattice, though a similarsituation cannot occur in two dimensions. Next, I will show thatthe string potential, which is believed to be felt by the hole movingin a two-dimensional Ising antiferromagnet, is significantly destroyedby the magnon-magnon interactions. Join Zoom Meetinghttps://us02web.zoom.us/j/83686899432?pwd=RXNtZkhtZFpLazVmMVRFY1BtVlI0Zz09Meeting ID: 836 8689 9432Passcode: cond-matt