TY - JOUR
T1 - Dynamic exponent of t-J and t-J-W model
AU - Tsunetsugu, Hirokazu
AU - Imada, Masatoshi
PY - 1998/6
Y1 - 1998/6
N2 - Drude weight of optical conductivity is calculated at zero temperature by exact diagonalization for the two-dimensional t-J model with the two-particle term, W. For the ordinary t-J model with W=0, the scaling of the Drude weight D ∝ δ2 for small doping concentration δ is obtained, which indicates anomalous dynamic exponent z=4 of the Mott transition. When W is switched on, the dynamic exponent recovers its conventional value z=2. This corresponds to an incoherent-to-coherent transition associated with the switching of the two-particle transfer.
AB - Drude weight of optical conductivity is calculated at zero temperature by exact diagonalization for the two-dimensional t-J model with the two-particle term, W. For the ordinary t-J model with W=0, the scaling of the Drude weight D ∝ δ2 for small doping concentration δ is obtained, which indicates anomalous dynamic exponent z=4 of the Mott transition. When W is switched on, the dynamic exponent recovers its conventional value z=2. This corresponds to an incoherent-to-coherent transition associated with the switching of the two-particle transfer.
KW - Drude weight
KW - Mott transition
KW - Optical conductivity
KW - Strongly correlated electrons
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U2 - 10.1143/JPSJ.67.1864
DO - 10.1143/JPSJ.67.1864
M3 - Article
AN - SCOPUS:22044452861
SN - 0031-9015
VL - 67
SP - 1864
EP - 1867
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 6
ER -