Bulk and surface electronic properties of SmB6: A hard x-ray photoelectron 
spectroscopy study

Utsumi, Y.; Kasinathan, D.; Ko, K.-T.; Agrestini, S.; Haverkort, M. W.; Wirth, S.; Wu, Y-H.; Tsuei, K-D.; Kim, D-J.; Fisk, Z.; Tanaka, A.; Thalmeier, P.; Tjeng, L. H.

doi:10.1103/PhysRevB.96.155130

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Bulk and surface electronic properties of SmB₆: A hard x-ray photoelectron spectroscopy study

MPS-Authors

/persons/resource/persons130020

Utsumi, Y.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126681

Kasinathan, D.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126699

Ko, K.-T.
Kyung-Tae Ko, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126507

Agrestini, S.
Stefano Agrestini, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126647

Haverkort, M. W.
Maurits Haverkort, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126910

Wirth, S.
Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126879

Thalmeier, P.
Peter Thalmeier, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126881

Tjeng, L. H.
Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Utsumi, Y., Kasinathan, D., Ko, K.-T., Agrestini, S., Haverkort, M. W., Wirth, S., et al. (2017). Bulk and surface electronic properties of SmB₆: A hard x-ray photoelectron spectroscopy study. Physical Review B, 96(15): 155130, pp. 1-10. doi:10.1103/PhysRevB.96.155130.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002E-2685-B

Abstract

We have carried out bulk-sensitive hard x-ray photoelectron spectroscopy measurements on in situ cleaved and ex situ polished SmB6 single crystals. Using the multiplet structure in the Sm 3d core level spectra, we determined reliably that the valence of Sm in bulk SmB6 is close to 2.55 at similar to 5 K. Temperature dependent measurements revealed that the Sm valence gradually increases to 2.64 at 300 K. From a detailed line shape analysis we can clearly observe that not only the J = 0 but also the J = 1 state of the Sm 4f(6) configuration becomes occupied at elevated temperatures. Making use of the polarization dependence, we were able to identify and extract the Sm 4f spectral weight of the bulk material. Finally, we revealed that the oxidized or chemically damaged surface region of the ex situ polished SmB6 single crystal is surprisingly thin, about 1 nm only.