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Instruments / Technical Area	Publication Details	Published	Actions
I10-Beamline for Advanced Dichroism	High-mobility Sm-doped Bi2Se3 ferromagnetic topological insulators and robust exchange couplin Taishi Chen , Wenqing Liu , Fubao Zheng , Ming Gao , Xingchen Pan , Gerrit Van Der Laan , Xuefeng Wang , Qinfang Zhang , Fengqi Song , Baigeng Wang , Baolin Wang , Yongbing Xu , Guanghou Wang , Rong Zhang Advanced Materials DOI: 10.1002/adma.201501254 PMID: 26178149 Diamond Proposal Number(s): [8757] Show Abstract ▼ Abstract: High-mobility (SmxBi1-x)2Se3 topological insulators (with x = 0.05) show a Curie temperature of about 52 K, and the carrier concentration and Fermi wave vector can be manipulated by intentional Te introduction with no significant influence on the Curie temperature. The origin of the ferromagnetism is attributed to the trivalent Sm dopant, as confirmed by X-ray magnetic circular dichroism and first-principles calculations. The carrier concentration is on the order of 1019 cm−3 and the mobility can reach about 7200 cm2 V−1 s−1 with pronounced Shubnikov–de Haas oscillations.	Jul 2015

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