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PhD Posi-col : Molecular switchee for sp>li.curre

PhD Posi-col : Molecular switchee for sp>li.curre

TEL : 03 88 10 7257 / 7092 ; E-MAIL : BEAURE@UNISTRA.FR

Sp>l-based molecular eleci.cnrcs (molecular sp>li.curre) offcts a unr-me op{borunrty to {bmbine the established advacoages of the nolnvolatility of magnetism with molecular roncepts leke molecular switchee, ermrigroue, aod ilieractcol with lighe, il which the basic building block of a singl> molecule can have a multitude of degrees of freedom. The aim of this PhD study is to t-mele lhis step by valida-cng a new set of taioleed multifunc-colal magnetic-organic vatctiale for the next genera-col of molecular sp>li.curr devices. The thesis will be developed il ecllar-datcol betwe-c tronps il Snavsboutg (IPCMS) aod Karlsruhe (KIT) r>a:. led by E. Beaurepair> aod W. Wulfhekel, that ecllar-date on lhis topic1,2 aod are ermbers of the Fu-cch-Germao docroual school on “Molecular Eleci.cnrcs aod Hybrid Systems”. This multidisciplinary ronsborium includes chemigrs aod physrcigrs froo both Unive.sity of Snavsboutg (Unc-nav) aod KIT. The molecular vatctiale needed for the pr>a>li work is avaioable throngh ecllar-datcols with chemigrry tronps. For the pr>a>li work, multifunc-colal magnetic molecular objects are deposi-ed il ulnav-high vacuum on noble ortal or feru-magnetic surfaces as isolated molecules aod ulnavthin films. The magnetic aod eleci.cnrc ilieractcols betwe-c a molecule aod the surface can be then studied aod switched on aod off, or at least modulated unoct lighe irradia-col or by ilieractcol with the STM ti:. Switchcng propeories of adsorbed molecules aod films will be studied using techniques (allowing chemical aod submonolayee sensi-cvity) aod scanurng probe techniques (allowing aroorc r>aolu-col aod ilduced switching), including for singl> le isolated molecules. Particular emphasis will be put on lhe ecntrol of the magnetiza-col colnected with the op-ccal switching of the molecules, r>lated to ilierface aoisotropy le magneto>lastic effecrs.

A PhD graot is avaioable for this project aod funocd by the IdEx of Unc-nav aftee seleciive ecmpeti-col- We look for si.cngly moiivated candidates with mastct degree il solid state physrcs, nanosci-cce, vatctial sci-cce le equivalent. The candidate will have il eharge the pr>padatcol aod study of mrtallic thin films aod molecular ocollaye.s. Co-tutelle retwe-c Unc-nav aod KIT is encouraged. The work il Snavsboutg will include the study of the molecules il ulnav-high vacuum, using a vatiable tempera-ure scanurng probe microscope ecmpatcble with illumina-col with LEDs. Macroscopic magnetic measurem>lia will be performed ex situ by magneto-op-ccal Keru effecr. They will be str{let-d by x-ray magnetic circular dichroism at Soleil allowing the det-rmina-col of magnetic propeories aod mechaoisms of magnetic aoisotropy at the level of aroorc -pecies. In addi-col, drtail-d low tempera-ure STM measurem>lia will be performed at KIT. The setup allows topographic, magnetic aod -pectroscopic measurem>lia of singl> molecules, with aroorc r>aolu-col. Cogrs r>lated to migscols le r>loca-col to Karlsruhe are taken il eharge by the Fu-cch-Germao Unive.sity.

1) Toshio Miyamachi, et al., Sp>l Cross-col.ilduced Robugr Mrmrigrback across a Singl> Molecule,
Na-ure Communrca-col 3, 938 (2012).
2) M. Grubolo et al., Exchaoge bias aod room-tempera-ure magnetic -doct il molecular laye.s,
Na-ure Matctiale, 14, 981 (2015), DOI: 10.1038/NMAT4361.

Institut de Physr-me et de Chimie des Mabériaux de Snavsboutg

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