Orienting Dilute Thin Films of Non-planar Spin-1/2 Vanadyl-phthalocyanine Complexes

Overview

Journal Mater Adv

Publisher Royal Society of Chemistry

Date 2022 Jul 11

PMID 35812836

Authors

Zhewen Xu

Vladyslav Romankov

Andrin Doll

Jan Dreiser

Affiliations

Soon will be listed here.

Abstract

The molecular orientation as well as the electronic and magnetic properties of vanadyl-phthalocyanine (VOPc) diluted into titanyl-phthalocyanine (TiOPc) thin films on Si(100) and polycrystalline aluminum substrates have been investigated by soft X-ray absorption spectroscopy (XAS), X-ray linear dichroism (XLD) and X-ray magnetic circular dichroism (XMCD). On the bare substrates the films grow with a standing-up geometry. By contrast, on template layers of 3,4,9,10-perylene-tetracarboxylic dianhydride (PTCDA), they assume a lying-down orientation. Moreover, a theoretical model based on the normalized intensity of the nitrogen K-edge XLD is established in order to extract the molecular orientation angle quantitatively without the need for crystallinity and with the sub-monolayer sensitivity of soft-XAS. XMCD reveals that the vanadium magnetic properties are preserved in both non-diluted and diluted films. The results pave the way toward the use of VOPc as nanometer-sized spin quantum bits.

Citing Articles

Element-specific X-Ray detection of electron paramagnetic resonance in thin films of quantum bits.

Doll A, Xu Z, Romankov V, Boero G, Rusponi S, Brune H Nat Commun. 2024; 15(1):10313.

PMID: 39609391 PMC: 11605076. DOI: 10.1038/s41467-024-54586-3.

References

Gaita-Arino A, Luis F, Hill S, Coronado E . Molecular spins for quantum computation. Nat Chem. 2019; 11(4):301-309. DOI: 10.1038/s41557-019-0232-y. View

Heinrich A, Oliver W, Vandersypen L, Ardavan A, Sessoli R, Loss D . Quantum-coherent nanoscience. Nat Nanotechnol. 2021; 16(12):1318-1329. DOI: 10.1038/s41565-021-00994-1. View

Carra , Thole , Altarelli , Wang . X-ray circular dichroism and local magnetic fields. Phys Rev Lett. 1993; 70(5):694-697. DOI: 10.1103/PhysRevLett.70.694. View

Malavolti L, Briganti M, Hanze M, Serrano G, Cimatti I, McMurtrie G . Tunable Spin-Superconductor Coupling of Spin 1/2 Vanadyl Phthalocyanine Molecules. Nano Lett. 2018; 18(12):7955-7961. DOI: 10.1021/acs.nanolett.8b03921. View

Melville O, Lessard B, Bender T . Phthalocyanine-Based Organic Thin-Film Transistors: A Review of Recent Advances. ACS Appl Mater Interfaces. 2015; 7(24):13105-18. DOI: 10.1021/acsami.5b01718. View

Thole , Carra , Sette , van der Laan G . X-ray circular dichroism as a probe of orbital magnetization. Phys Rev Lett. 1992; 68(12):1943-1946. DOI: 10.1103/PhysRevLett.68.1943. View

Wu W, Liu Y, Zhu D . Pi-conjugated molecules with fused rings for organic field-effect transistors: design, synthesis and applications. Chem Soc Rev. 2010; 39(5):1489-502. DOI: 10.1039/b813123f. View

Baldovi J, Cardona-Serra S, Clemente-Juan J, Coronado E, Gaita-Arino A, Prima-Garcia H . Coherent manipulation of spin qubits based on polyoxometalates: the case of the single ion magnet [GdW30P5O110]14-. Chem Commun (Camb). 2013; 49(79):8922-4. DOI: 10.1039/c3cc44838j. View

Bienfait A, Pla J, Kubo Y, Stern M, Zhou X, Lo C . Reaching the quantum limit of sensitivity in electron spin resonance. Nat Nanotechnol. 2015; 11(3):253-7. DOI: 10.1038/nnano.2015.282. View

10.

Atzori M, Tesi L, Morra E, Chiesa M, Sorace L, Sessoli R . Room-Temperature Quantum Coherence and Rabi Oscillations in Vanadyl Phthalocyanine: Toward Multifunctional Molecular Spin Qubits. J Am Chem Soc. 2016; 138(7):2154-7. DOI: 10.1021/jacs.5b13408. View

11.

Serrano G, Velez-Fort E, Cimatti I, Cortigiani B, Malavolti L, Betto D . Magnetic bistability of a TbPc submonolayer on a graphene/SiC(0001) conductive electrode. Nanoscale. 2018; 10(6):2715-2720. DOI: 10.1039/c7nr08372f. View

12.

De Francesco R, Stener M, Fronzoni G . Theoretical study of near-edge X-ray absorption fine structure spectra of metal phthalocyanines at C and N K-edges. J Phys Chem A. 2012; 116(11):2885-94. DOI: 10.1021/jp2109913. View

13.

Perfetti M, Serri M, Poggini L, Mannini M, Rovai D, Sainctavit P . Molecular Order in Buried Layers of TbPc2 Single-Molecule Magnets Detected by Torque Magnetometry. Adv Mater. 2016; 28(32):6946-51. DOI: 10.1002/adma.201600791. View

14.

Eremtchenko M, Schaefer J, Tautz F . Understanding and tuning the epitaxy of large aromatic adsorbates by molecular design. Nature. 2003; 425(6958):602-5. DOI: 10.1038/nature01901. View

15.

Warner M, Din S, Tupitsyn I, Morley G, Stoneham A, Gardener J . Potential for spin-based information processing in a thin-film molecular semiconductor. Nature. 2013; 503(7477):504-8. DOI: 10.1038/nature12597. View

16.

Yang J, Yan D, Jones T . Molecular template growth and its applications in organic electronics and optoelectronics. Chem Rev. 2015; 115(11):5570-603. DOI: 10.1021/acs.chemrev.5b00142. View

17.

Huang L, Wang Z, Zhu X, Chi L . Electrical gas sensors based on structured organic ultra-thin films and nanocrystals on solid state substrates. Nanoscale Horiz. 2020; 1(5):383-393. DOI: 10.1039/c6nh00040a. View

18.

Piamonteze C, Flechsig U, Rusponi S, Dreiser J, Heidler J, Schmidt M . X-Treme beamline at SLS: X-ray magnetic circular and linear dichroism at high field and low temperature. J Synchrotron Radiat. 2012; 19(Pt 5):661-74. DOI: 10.1107/S0909049512027847. View

19.

Forrest , Burrows , Haskal , So . Ultrahigh-vacuum quasiepitaxial growth of model van der Waals thin films. II. Experiment. Phys Rev B Condens Matter. 1994; 49(16):11309-11321. DOI: 10.1103/physrevb.49.11309. View

20.

Vasseur K, Rand B, Cheyns D, Temst K, Froyen L, Heremans P . Correlating the Polymorphism of Titanyl Phthalocyanine Thin Films with Solar Cell Performance. J Phys Chem Lett. 2015; 3(17):2395-400. DOI: 10.1021/jz300993p. View