Contributo in atti di convegno, 2020, ENG, 10.1063/5.0017040

Anomalous spectral evolution with bulk sensitivity in BiPd

Pramanik, Arindam; Pandeya, Ram Prakash; Ali, Khadiza; Moras, Paolo; Sheverdyaeva, Polina M.; Carbone, Carlo; Joshi, Bhanu; Thamizhavel, A.; Ramakrishnan, S.; Maiti, Kalobaran

Tata Institute of Fundamental Research, Mumbai; Consiglio Nazionale delle Ricerche

We investigate the electronic structure of a noncentrosymmetric superconductor, BiPd using photoemission spectroscopy with multiple photon energies ranging from ultraviolet to hard x-ray. Experimental data exhibit interesting difference in the surface and bulk electronic structures of this system. While the surface Bi core level peaks appear at lower binding energies, the surface valence band features are found at the higher binding energy side of the bulk valence band; valence band is primarily constituted by the Pd 4d states.These changes in the electronic structure cannot be explained by the change in ionicity of the constituent elements via charge transfer. Analysis of the experimental data indicates that the Bi-Pd hybridization physics plays the key role in deriving the anomalous spectral evolution and the electronic properties of this system.

DAE Solid State Physics Symposium 2019, Indian Institute of Technology, Jodhpur, India, 18/12/2019,22/12/2019

Keywords

ultraviolet photoemission, X-ray photoemission, noncentrosymmetric superconductor

CNR authors

Carbone Carlo, Moras Paolo, Sheverdyaeva Polina

CNR institutes

ISM – Istituto di struttura della materia