Competition of superconducting phenomena and Kondo screening at the nanoscale.
作者： K. J. Franke , G. Schulze , J. I. Pascual
关键词: Singlet state 、 Superstructure (condensed matter) 、 Superconductivity 、 Ground state 、 State of matter 、 Quantum phase transition 、 Magnetic moment 、 Chemistry 、 Condensed matter physics 、 Kondo effect
摘要: Magnetic and superconducting interactions couple electrons together to form complex states of matter. We show that, at the atomic scale, both types can coexist compete influence ground state a localized magnetic moment. Local spectroscopy 4.5 kelvin shows that spin-1 system formed by manganese-phthalocyanine (MnPc) adsorbed on Pb(111) lie in two different states. These are determined balance between Kondo screening pair-breaking interactions. Both alternate nanometer length scales Moire-like superstructure. The quantum phase transition connecting (singlet doublet) is thus tuned small changes molecule-lead interaction.
sciencemag.org
harvard.edu参考文章(30)
J Bauer, A Oguri, A C Hewson, Spectral properties of locally correlated electrons in a BCS superconductor arXiv: Strongly Correlated Electrons. ,(2007) , 10.1088/0953-8984/19/48/486211
A. Eichler, M. Weiss, S. Oberholzer, C. Schönenberger, A. Levy Yeyati, J. C. Cuevas, A. Martín-Rodero, Even-odd effect in Andreev transport through a carbon nanotube quantum dot. Physical Review Letters. ,vol. 99, pp. 126602- ,(2007) , 10.1103/PHYSREVLETT.99.126602
Osamu Sakai, Yukihiro Shimizu, Hiroyuki Shiba, Koji Satori, Numerical Renormalization Group Study of Magnetic Impurities in Superconductors. II. Dynamical Excitation Spectra and Spatial Variation of the Order Parameter Journal of the Physical Society of Japan. ,vol. 62, pp. 3181- 3197 ,(1993) , 10.1143/JPSJ.62.3181
Jiutao Li, Wolf-Dieter Schneider, Richard Berndt, Bernard Delley, Kondo Scattering Observed at a Single Magnetic Impurity Physical Review Letters. ,vol. 80, pp. 2893- 2896 ,(1998) , 10.1103/PHYSREVLETT.80.2893
D. A. Ivanov, Non-Abelian statistics of half-quantum vortices in p-wave superconductors. Physical Review Letters. ,vol. 86, pp. 268- 271 ,(2001) , 10.1103/PHYSREVLETT.86.268
Meng-Sheng Liao, John D. Watts, Ming-Ju Huang, DFT Study of Unligated and Ligated ManganeseII Porphyrins and Phthalocyanines Inorganic Chemistry. ,vol. 44, pp. 1941- 1949 ,(2005) , 10.1021/IC0401039
T. Sand-Jespersen, J. Paaske, B. M. Andersen, K. Grove-Rasmussen, H. I. Jørgensen, M. Aagesen, C. B. Sørensen, P. E. Lindelof, K. Flensberg, J. Nygård, Kondo-enhanced Andreev tunneling in InAs nanowire quantum dots. Physical Review Letters. ,vol. 99, pp. 126603- 126603 ,(2007) , 10.1103/PHYSREVLETT.99.126603
M. I. Salkola, A. V. Balatsky, J. R. Schrieffer, Spectral properties of quasiparticle excitations induced by magnetic moments in superconductors Physical Review B. ,vol. 55, pp. 12648- 12661 ,(1997) , 10.1103/PHYSREVB.55.12648
I. Horcas, R. Fernández, J. M. Gómez-Rodríguez, J. Colchero, J. Gómez-Herrero, A. M. Baro, WSXM: a software for scanning probe microscopy and a tool for nanotechnology. Review of Scientific Instruments. ,vol. 78, pp. 013705- 013705 ,(2007) , 10.1063/1.2432410
Hiroyuki Shiba, Classical Spins in Superconductors Progress of Theoretical Physics. ,vol. 40, pp. 435- 451 ,(1968) , 10.1143/PTP.40.435