Jahn-Teller Splitting in Single Adsorbed Molecules Revealed by Isospin-Flip Excitations

Kügel, Jens ; Hsu, Pin-Jui ; Böhme, Markus ; Schneider, Katrhin ; Senkpiel, Jacob ; Serrate, David (Universidad de Zaragoza) ; Bode, Matthias ; Lorente, Nicolás

Resumen: Scanning tunneling spectroscopy measurements of Mn phthalocyanine (MnPc) molecules adsorbed on (√3×√3) surface alloys show single inelastic steps at exclusively positive or negative bias strongly depending on the tip position. This is in contrast to conventional molecular excitation thresholds, which are independent of the current direction and therefore always occur at both positive and negative bias. This polarity selectivity is found to coincide with the spatial distribution of occupied and empty orbitals. Because of the interaction with the substrate, charge transfer into the doubly degenerate dπ orbitals of MnPc takes place. The resulting Jahn-Teller effect lifts the degeneracy and leads to an isospin- or pseudospin-flip excitation, the inelastic analogue of an orbital Kondo resonance.

Idioma: Inglés

DOI: 10.1103/PhysRevLett.121.226402

Año: 2018

Publicado en: Physical Review Letters 121, 22 (2018), 226402 [6 pp.]
ISSN: 0031-9007

Factor impacto JCR: 9.227 (2018)

Categ. JCR: PHYSICS, MULTIDISCIPLINARY rank: 6 / 81 = 0.074 (2018) - Q1 - T1

Factor impacto SCIMAGO: 3.571 - Physics and Astronomy (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2015-66888-C3-2R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2016-78293-C6-6R

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)