k dependence of the spin polarization in ${\mathrm{Mn}}_{5}{\mathrm{Ge}}_{3}/\mathrm{Ge}(111)$ thin films

k dependence of the spin polarization in ${Mn}_{5} {Ge}_{3} / Ge (111)$ thin films

W. Ndiaye, J.-M. Mariot, P. De Padova, M. C. Richter, W. Wang, O. Heckmann, A. Taleb-Ibrahimi, P. Le Fèvre, F. Bertran, C. Cacho, M. Leandersson, T. Balasubramanian, A. Stroppa, S. Picozzi, and K. Hricovini

Phys. Rev. B 91, 125118 – Published 11 March 2015

Abstract

${Mn}_{5} Ge_{3}$ (001) thin films grown on Ge(111) were studied by angle- and spin-resolved photoemission using synchrotron radiation in the 17–40 eV photon energy range. The photoelectron spectra were simulated starting from a first-principles band-structure calculation for the ground state, using the free-electron approximation for the final states, taking into account photohole lifetime effects and $k_{⊥}$ broadening plus correlation effects, but ignoring transition matrix elements. The measured spin polarizations for the various k points investigated in the $Γ MLA$ plane of the Brillouin zone are found to be in fair enough agreement with the simulated ones, providing a strong support to the ground-state band-structure calculations. Possible origins for the departures between either simulations and experiments or previous and present experiments are discussed.

Received 21 October 2014
Revised 16 February 2015

DOI:https://doi.org/10.1103/PhysRevB.91.125118

Authors & Affiliations

W. Ndiaye¹, J.-M. Mariot^2,3, P. De Padova⁴, M. C. Richter^1,5, W. Wang^1,6,*, O. Heckmann^1,5, A. Taleb-Ibrahimi⁷, P. Le Fèvre⁸, F. Bertran⁸, C. Cacho⁹, M. Leandersson¹⁰, T. Balasubramanian¹⁰, A. Stroppa^11,12, S. Picozzi^11,12, and K. Hricovini^1,5

¹Laboratoire de Physique des Matériaux et des Surfaces, Université de Cergy-Pontoise, 5 mail Gay-Lussac, 95031 Cergy-Pontoise, France
²Sorbonne Universités, UPMC Univ Paris 06, UMR 7614, Laboratoire de Chimie Physique–Matière et Rayonnement, 11 rue Pierre et Marie Curie, F-75231 Paris Cedex 05, France
³CNRS, UMR 7614, Laboratoire de Chimie Physique–Matière et Rayonnement, 11 rue Pierre et Marie Curie, F-75231 Paris Cedex 05, France
⁴CNR, Istituto di Struttura della Materia, via Fosso del Cavaliere, 00133 Roma, Italy
⁵DSM, IRAMIS, Service de Physique de l'Etat Condensé, CEA-Saclay, 91191 Gif-sur-Yvette, France
⁶Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
⁷UR1-CNRS/Synchrotron SOLEIL, Saint-Aubin, B.P. 48, 91192 Gif-sur-Yvette Cedex, France
⁸Synchrotron SOLEIL, Saint-Aubin, B.P. 48, 91192 Gif-sur-Yvette Cedex, France
⁹Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, United Kingdom
¹⁰Lund University, MAX-lab, P.O. Box 118, 221 00 Lund, Sweden
¹¹CNR, Institute for Superconducting and Innovative Materials and Devices (CNR-SPIN), 67100 L'Aquila, Italy
¹²Dipartimento di Fisica, Università degli Studi dell'Aquila, Via Vetoio 10, 67010 Coppito (L'Aquila), Italy

^*Present address: Department of Physics, Biology and Chemistry, Surface and Semiconductor Physics Group, Linköping University, SE-581 83 Linköping, Sweden.

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 91, Iss. 12 — 15 March 2015

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review B

covering condensed matter and materials physics

k dependence of the spin polarization in ${Mn}_{5} {Ge}_{3} / Ge (111)$ thin films

W. Ndiaye, J.-M. Mariot, P. De Padova, M. C. Richter, W. Wang, O. Heckmann, A. Taleb-Ibrahimi, P. Le Fèvre, F. Bertran, C. Cacho, M. Leandersson, T. Balasubramanian, A. Stroppa, S. Picozzi, and K. Hricovini

Phys. Rev. B 91, 125118 – Published 11 March 2015

Abstract

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Physical Review B

covering condensed matter and materials physics

k dependence of the spin polarization in Mn5Ge3/Ge(111) thin films

W. Ndiaye, J.-M. Mariot, P. De Padova, M. C. Richter, W. Wang, O. Heckmann, A. Taleb-Ibrahimi, P. Le Fèvre, F. Bertran, C. Cacho, M. Leandersson, T. Balasubramanian, A. Stroppa, S. Picozzi, and K. Hricovini

Phys. Rev. B 91, 125118 – Published 11 March 2015

Abstract

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Authorization Required

Other Options

Download & Share

Images

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Log In

Search

Article Lookup

Paste a citation or DOI

Enter a citation

k dependence of the spin polarization in ${Mn}_{5} {Ge}_{3} / Ge (111)$ thin films