Condensed Matter Theory Seminar | August 29, 14:00
Effect of vacancies on J1-J2 Heisenberg Model
The spin-1/2 nearest neighbour AFM Heisenberg model on square lattice is known to exhibit an exotic phase diagram depending on the J2/J1 strength. In this seminar, I will talk about a semi-classical approach which captures the effective quantum picture by using dimers as proxy for quantum fluctuations. In the final part I will show the changes in the same model on introducing vacancies/holes (spin 0). It is observed that the intermediate spin-liquid/dimer region between NĂ©el order and collinear AFM state gets extended on both the sides.
IISER Mohali (India)
Seminar Room 0.03, ETP
Contact: Matteo Rizzi