TY  - JOUR
AU  - Tsukamoto, S.
AU  - Egami, Y.
AU  - Hirose, K.
AU  - Blügel, S.
TI  - Stabilized scattering wave-function calculations using the Lippmann-Schwinger equation for long conductor systems
JO  - Physical review / B
VL  - 84
IS  - 11
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-16694
SP  - 115443
PY  - 2011
N1  - We are gratefully acknowledge Professor T. Ono of Osaka University for a number of comments and suggestions. This work is supported in part by the Strategic Japanese-German Cooperative Program of the Japan Science and Technology Agency and the German Research Foundation. Some of the computations were carried out by the supercomputer JuRoPa at Julich Supercomputing Centre, Forschungszentrum Julich.
AB  - We present an improvement of the Lippmann-Schwinger equation method, which calculates electron-scattering wave functions of a nanoscale conductor suspended between a pair of electrodes. The improvement eliminates the numerical collapse which frequently occurs while solving the Lippmann-Schwinger equation for long conductor systems and originates from evanescent wave components of the retarded Green's function of the Lippmann-Schwinger equation. We introduce regularization and ratio expression into the Green's function matrix and discover that the resultant Green's function does not suffer from the numerical collapse without increasing computational cost. As a performance test, we carry out electron transport calculations of Al monoatomic linear chains with a length of up to 75.6 bohrs. The numerical test demonstrates that the improved Lippmann-Schwinger equation method is applicable to long conductor systems with no numerical collapse and adequate computational accuracy.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000295163100011
DO  - DOI:10.1103/PhysRevB.84.115443
UR  - https://juser.fz-juelich.de/record/16694
ER  -