TY - JOUR
T1 - Switching of Dirac-Fermion Mass at the Interface of Ultrathin Ferromagnet and Rashba Metal
AU - Honma, K.
AU - Sato, T.
AU - Souma, S.
AU - Sugawara, K.
AU - Tanaka, Y.
AU - Takahashi, T.
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/12/23
Y1 - 2015/12/23
N2 - We have performed spin- and angle-resolved photoemission spectroscopy on tungsten (110) interfaced with an ultrathin iron (Fe) layer to study an influence of ferromagnetism on the Dirac-cone-like surface-interface states. We found an unexpectedly large energy gap of 340 meV at the Dirac point, and have succeeded in switching the Dirac-fermion mass by controlling the direction of Fe spins (in plane or out of plane) through tuning the thickness of the Fe overlayer or adsorbing oxygen on it. Such a manipulation of Dirac-fermion mass via the magnetic proximity effect opens a promising platform for realizing new spintronic devices utilizing a combination of exchange and Rashba-spin-orbit interactions.
AB - We have performed spin- and angle-resolved photoemission spectroscopy on tungsten (110) interfaced with an ultrathin iron (Fe) layer to study an influence of ferromagnetism on the Dirac-cone-like surface-interface states. We found an unexpectedly large energy gap of 340 meV at the Dirac point, and have succeeded in switching the Dirac-fermion mass by controlling the direction of Fe spins (in plane or out of plane) through tuning the thickness of the Fe overlayer or adsorbing oxygen on it. Such a manipulation of Dirac-fermion mass via the magnetic proximity effect opens a promising platform for realizing new spintronic devices utilizing a combination of exchange and Rashba-spin-orbit interactions.
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U2 - 10.1103/PhysRevLett.115.266401
DO - 10.1103/PhysRevLett.115.266401
M3 - Article
AN - SCOPUS:84953332447
SN - 0031-9007
VL - 115
JO - Physical Review Letters
JF - Physical Review Letters
IS - 26
M1 - 266401
ER -