Effects of Rashba and Dresselhaus spin-orbit interactions on the ground state of two-dimensional localized spins.
Starting with the indirect exchange model influenced by the Rashba and the Dresselhaus spin-orbit interactions, we derive the Dzyaloshinskii-Moriya interaction of localized spins. The strength of the Dzyaloshinskii-Moriya interaction is compared with that of the Heisenberg exchange term as a function of atomic distance. Using the calculated interaction strengths, we discuss the formation of various atomic ground states as a function of temperature and external magnetic field. By plotting the magnetic field-temperature phase diagram, we present approximate phase boundaries between the spiral, Skyrmion and ferromagnetic states of the two-dimensional weak ferromagnetic system.
Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
J H
JH
Oh
K-J
KJ
Lee
Hyun-Woo
HW
Lee
M
M
Shin
D060526:Magnetic Fields; D060328:Magnetic Phenomena; D008962:Models, Theoretical; D013696:Temperature