TY - JOUR
T1 - Spin diffusion in the double-exchange model at intermediate temperatures
AU - Fishman, R. S.
PY - 2000/9/11
Y1 - 2000/9/11
N2 - Using a combined numerical and analytic approach, we evaluate the spin-diffusion coefficient D for the double-exchange model in the limit t ≪ T ≪ JH, where t is the hopping energy, T is the temperature, and JH is the Hund's coupling. To lowest order, D ∝ tq(1 - 2q)/T χ where q is given in terms of the band filling p by either p(p < 1/2 ) or 1 - p(p > 1/2 ). Hence, the spin-diffusion coefficient vanishes when the electrons are unable to hop between singly-occupied sites in a half-filled (p = 1/2 ) band.
AB - Using a combined numerical and analytic approach, we evaluate the spin-diffusion coefficient D for the double-exchange model in the limit t ≪ T ≪ JH, where t is the hopping energy, T is the temperature, and JH is the Hund's coupling. To lowest order, D ∝ tq(1 - 2q)/T χ where q is given in terms of the band filling p by either p(p < 1/2 ) or 1 - p(p > 1/2 ). Hence, the spin-diffusion coefficient vanishes when the electrons are unable to hop between singly-occupied sites in a half-filled (p = 1/2 ) band.
UR - http://www.scopus.com/inward/record.url?scp=0034271611&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/12/36/101
DO - 10.1088/0953-8984/12/36/101
M3 - Article
AN - SCOPUS:0034271611
SN - 0953-8984
VL - 12
SP - L575-L581
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 36
ER -