TY - JOUR
T1 - Transport mechanisms in doped LaMnO3
T2 - Evidence for polaron formation
AU - Palstra, T.
AU - Ramirez, A.
AU - Cheong, S. W.
AU - Zegarski, B.
AU - Schiffer, P.
AU - Zaanen, J.
PY - 1997/1/1
Y1 - 1997/1/1
N2 - We report electrical transport experiments on the colossal magnetoresistance compound (Formula presented) over a wide range of composition and temperature. Comparison of thermopower and electrical resistivity measurements above the metal-insulator transition indicate a transport mechanism not dominated by spin disorder, but by small polaron formation. Additionally, we find that in the high-temperature limit the thermopower corresponds to backflow of spin entropy, expected from motion of positively charged particles in a rigid (Formula presented) system, showing a remarkable independence of (Formula presented) particle density.
AB - We report electrical transport experiments on the colossal magnetoresistance compound (Formula presented) over a wide range of composition and temperature. Comparison of thermopower and electrical resistivity measurements above the metal-insulator transition indicate a transport mechanism not dominated by spin disorder, but by small polaron formation. Additionally, we find that in the high-temperature limit the thermopower corresponds to backflow of spin entropy, expected from motion of positively charged particles in a rigid (Formula presented) system, showing a remarkable independence of (Formula presented) particle density.
UR - http://www.scopus.com/inward/record.url?scp=0001693454&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.56.5104
DO - 10.1103/PhysRevB.56.5104
M3 - Article
AN - SCOPUS:0001693454
VL - 56
SP - 5104
EP - 5107
JO - Physical review B: Condensed matter and materials physics
JF - Physical review B: Condensed matter and materials physics
SN - 1098-0121
IS - 9
ER -