Abstract:
Strong diamagnetism signal has been reported recently in toque magnetism experiment in high Tc cuprate. The cooper pair in the pseudogap state has very short coherent length, strongly fluctuated, and tight bonding in real space. The existence of Fermi “arc” or “pocket” around nodes suggested there are free holes in the same system. A simply boson-fermion model is established. We applied continuous time quantum monte carlo to simulate it. The renormalization of the bosonic band gives arise to large dismagnetism in agreement with experiments.
Coffee and tea will be served 20 minutes prior to the seminar.