Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd

H. M. Benia; E. Rampi; C. Trainer; C. M. Yim; A. Maldonado; D. C. Peets; A. Stoehr; U. Starke; K. Kern; A. Yaresko; G. Levy; A. Damascelli; C. R. Ast; A. P. Schnyder; P. Wahl

doi:10.1103/PhysRevB.94.121407

Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd

H. M. Benia, E. Rampi, C. Trainer, C. M. Yim, A. Maldonado, D. C. Peets, A. Stoehr, U. Starke, K. Kern, A. Yaresko, G. Levy, A. Damascelli, C. R. Ast, A. P. Schnyder, P. Wahl

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Abstract

Materials with strong spin-orbit coupling (SOC) have in recent years become a subject of intense research due to their potential applications in spintronics and quantum information technology. In particular, in systems which break inversion symmetry, SOC facilitates the Rashba-Dresselhaus effect, leading to a lifting of spin degeneracy in the bulk and intricate spin textures of the Bloch wave functions. Here, by combining angular resolved photoemission (ARPES) and low temperature scanning tunneling microscopy (STM) measurements with relativistic first-principles band structure calculations, we examine the role of SOC in single crystals of noncentrosymmetric BiPd. We report the detection of several Dirac surface states, one of which exhibits an extremely large spin splitting. Unlike the surface states in inversion-symmetric systems, the Dirac surface states of BiPd have completely different properties at opposite faces of the crystal and are not trivially linked by symmetry. The spin-splitting of the surface states exhibits a strong anisotropy by itself, which can be linked to the low in-plane symmetry of the surface termination.

Original language	English
Article number	121407
Number of pages	5
Journal	Physical Review. B, Condensed matter and materials physics
Volume	94
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.94.121407
Publication status	Published - 22 Sept 2016

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© 2016, American Physical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1103/PhysRevB.94.121407
Accepted author manuscript, 4.7 MB

Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems
Wahl, P. (PI), Baumberger, F. (CoI), Davis, J. C. (CoI), Green, A. (CoI), Hooley, C. (CoI), Keeling, J. M. J. (CoI) & Mackenzie, A. (CoI)
EPSRC
1/09/11 → 31/08/17
Project: Standard

Underpinning Data - Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd
Benia, H. M. (Creator), Rampi, E. (Creator), Trainer, C. W. J. (Creator), Yim, C. M. (Creator), Maldonado Cid, A. I. (Creator), Peets, D. C. (Creator), Stohr, A. (Creator), Starke, U. (Creator), Kern, K. (Creator), Yaresko, A. (Creator), Levy, G. (Creator), Damascelli, A. (Creator), Ast, C. R. (Creator), Schnyder, A. P. (Creator) & Wahl, P. (Creator), University of St Andrews, 31 Oct 2016
DOI: 10.17630/98fd54e4-90d8-4f23-b313-c22b817b2b6a
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Benia, H. M., Rampi, E., Trainer, C., Yim, C. M., Maldonado, A., Peets, D. C., Stoehr, A., Starke, U., Kern, K., Yaresko, A., Levy, G., Damascelli, A., Ast, C. R., Schnyder, A. P., & Wahl, P. (2016). Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd. Physical Review. B, Condensed matter and materials physics, 94(12), Article 121407. https://doi.org/10.1103/PhysRevB.94.121407

@article{9b104a19eaad40c9ab720ac06f73452a,

title = "Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd",

abstract = "Materials with strong spin-orbit coupling (SOC) have in recent years become a subject of intense research due to their potential applications in spintronics and quantum information technology. In particular, in systems which break inversion symmetry, SOC facilitates the Rashba-Dresselhaus effect, leading to a lifting of spin degeneracy in the bulk and intricate spin textures of the Bloch wave functions. Here, by combining angular resolved photoemission (ARPES) and low temperature scanning tunneling microscopy (STM) measurements with relativistic first-principles band structure calculations, we examine the role of SOC in single crystals of noncentrosymmetric BiPd. We report the detection of several Dirac surface states, one of which exhibits an extremely large spin splitting. Unlike the surface states in inversion-symmetric systems, the Dirac surface states of BiPd have completely different properties at opposite faces of the crystal and are not trivially linked by symmetry. The spin-splitting of the surface states exhibits a strong anisotropy by itself, which can be linked to the low in-plane symmetry of the surface termination.",

author = "Benia, {H. M.} and E. Rampi and C. Trainer and Yim, {C. M.} and A. Maldonado and Peets, {D. C.} and A. Stoehr and U. Starke and K. Kern and A. Yaresko and G. Levy and A. Damascelli and Ast, {C. R.} and Schnyder, {A. P.} and P. Wahl",

note = "Funding from the MPG-UBC center and the Engineering and Physical Sciences Research Council (EP/I031014/1 and EP/L505079/1) are acknowledged. This work was supported by the DFG within projects STA315/8-1 and BE5190/1-1.",

year = "2016",

month = sep,

day = "22",

doi = "10.1103/PhysRevB.94.121407",

language = "English",

volume = "94",

journal = "Physical Review. B, Condensed matter and materials physics",

issn = "1098-0121",

publisher = "American Physical Society",

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Benia, HM, Rampi, E, Trainer, C, Yim, CM, Maldonado, A, Peets, DC, Stoehr, A, Starke, U, Kern, K, Yaresko, A, Levy, G, Damascelli, A, Ast, CR, Schnyder, AP & Wahl, P 2016, 'Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd', Physical Review. B, Condensed matter and materials physics, vol. 94, no. 12, 121407. https://doi.org/10.1103/PhysRevB.94.121407

TY - JOUR

T1 - Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd

AU - Benia, H. M.

AU - Rampi, E.

AU - Trainer, C.

AU - Yim, C. M.

AU - Maldonado, A.

AU - Peets, D. C.

AU - Stoehr, A.

AU - Starke, U.

AU - Kern, K.

AU - Yaresko, A.

AU - Levy, G.

AU - Damascelli, A.

AU - Ast, C. R.

AU - Schnyder, A. P.

AU - Wahl, P.

N1 - Funding from the MPG-UBC center and the Engineering and Physical Sciences Research Council (EP/I031014/1 and EP/L505079/1) are acknowledged. This work was supported by the DFG within projects STA315/8-1 and BE5190/1-1.

PY - 2016/9/22

Y1 - 2016/9/22

N2 - Materials with strong spin-orbit coupling (SOC) have in recent years become a subject of intense research due to their potential applications in spintronics and quantum information technology. In particular, in systems which break inversion symmetry, SOC facilitates the Rashba-Dresselhaus effect, leading to a lifting of spin degeneracy in the bulk and intricate spin textures of the Bloch wave functions. Here, by combining angular resolved photoemission (ARPES) and low temperature scanning tunneling microscopy (STM) measurements with relativistic first-principles band structure calculations, we examine the role of SOC in single crystals of noncentrosymmetric BiPd. We report the detection of several Dirac surface states, one of which exhibits an extremely large spin splitting. Unlike the surface states in inversion-symmetric systems, the Dirac surface states of BiPd have completely different properties at opposite faces of the crystal and are not trivially linked by symmetry. The spin-splitting of the surface states exhibits a strong anisotropy by itself, which can be linked to the low in-plane symmetry of the surface termination.

AB - Materials with strong spin-orbit coupling (SOC) have in recent years become a subject of intense research due to their potential applications in spintronics and quantum information technology. In particular, in systems which break inversion symmetry, SOC facilitates the Rashba-Dresselhaus effect, leading to a lifting of spin degeneracy in the bulk and intricate spin textures of the Bloch wave functions. Here, by combining angular resolved photoemission (ARPES) and low temperature scanning tunneling microscopy (STM) measurements with relativistic first-principles band structure calculations, we examine the role of SOC in single crystals of noncentrosymmetric BiPd. We report the detection of several Dirac surface states, one of which exhibits an extremely large spin splitting. Unlike the surface states in inversion-symmetric systems, the Dirac surface states of BiPd have completely different properties at opposite faces of the crystal and are not trivially linked by symmetry. The spin-splitting of the surface states exhibits a strong anisotropy by itself, which can be linked to the low in-plane symmetry of the surface termination.

U2 - 10.1103/PhysRevB.94.121407

DO - 10.1103/PhysRevB.94.121407

M3 - Article

SN - 1098-0121

VL - 94

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

IS - 12

M1 - 121407

ER -

Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd

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Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

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Underpinning Data - Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd

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