SwePub
Sök i LIBRIS databas

  Extended search

WFRF:(Hoffman Daniel)
 

Search: WFRF:(Hoffman Daniel) > (2020-2024) > Mn-Rich MnSb2Te4 :

  • Wimmer, StefanJohannes Kepler Univ Linz, Inst Halbleiter & Festkorperphys, Altenberger Str 69, A-4040 Linz, Austria. (author)

Mn-Rich MnSb2Te4 : A Topological Insulator with Magnetic Gap Closing at High Curie Temperatures of 45-50 K

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • 2021-09
  • John Wiley & Sons,2021
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-470096
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-470096URI
  • https://doi.org/10.1002/adma.202102935DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Ferromagnetic topological insulators exhibit the quantum anomalous Hall effect, which is potentially useful for high-precision metrology, edge channel spintronics, and topological qubits. The stable 2+ state of Mn enables intrinsic magnetic topological insulators. MnBi2Te4 is, however, antiferromagnetic with 25 K Neel temperature and is strongly n-doped. In this work, p-type MnSb2Te4, previously considered topologically trivial, is shown to be a ferromagnetic topological insulator for a few percent Mn excess. i) Ferromagnetic hysteresis with record Curie temperature of 45-50 K, ii) out-of-plane magnetic anisotropy, iii) a 2D Dirac cone with the Dirac point close to the Fermi level, iv) out-of-plane spin polarization as revealed by photoelectron spectroscopy, and v) a magnetically induced bandgap closing at the Curie temperature, demonstrated by scanning tunneling spectroscopy (STS), are shown. Moreover, a critical exponent of the magnetization beta approximate to 1 is found, indicating the vicinity of a quantum critical point. Ab initio calculations reveal that Mn-Sb site exchange provides the ferromagnetic interlayer coupling and the slight excess of Mn nearly doubles the Curie temperature. Remaining deviations from the ferromagnetic order open the inverted bulk bandgap and render MnSb2Te4 a robust topological insulator and new benchmark for magnetic topological insulators.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Sanchez-Barriga, JaimeHelmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany. (author)
  • Küppers, PhilippRWTH Aachen Unvers, Inst Phys B 2, D-52074 Aachen, Germany.;RWTH Aachen Unvers, JARA FIT, D-52074 Aachen, Germany. (author)
  • Ney, AndreasJohannes Kepler Univ Linz, Inst Halbleiter & Festkorperphys, Altenberger Str 69, A-4040 Linz, Austria. (author)
  • Schierle, EnricoHelmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany. (author)
  • Freyse, FriedrichHelmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany.;Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany. (author)
  • Caha, OndrejMasaryk Univ, Dept Condensed Matter Phys, Kotlarska 267-2, Brno 61137, Czech Republic. (author)
  • Michalicka, JanBrno Univ Technol, Cent European Inst Technol, Purkynova 123, Brno 61200, Czech Republic. (author)
  • Liebmann, MarcusRWTH Aachen Unvers, Inst Phys B 2, D-52074 Aachen, Germany.;RWTH Aachen Unvers, JARA FIT, D-52074 Aachen, Germany. (author)
  • Primetzhofer, DanielUppsala universitet,Tillämpad kärnfysik(Swepub:uu)danpr521 (author)
  • Hoffman, MartinJohannes Kepler Univ Linz, Inst Theoret Phys, Altenberger Str 69, A-4040 Linz, Austria. (author)
  • Ernst, ArthurJohannes Kepler Univ Linz, Inst Theoret Phys, Altenberger Str 69, A-4040 Linz, Austria.;Max Planck Inst Microstruct Phys, Weinberg 2, D-06120 Halle, Germany. (author)
  • Otrokov, Mikhail M.EHU, Ctr Mixto CSICUPV, Ctr Fis Mat CFMMPC, San Sebastian 20018, Spain.;Basque Fdn Sci, IKERBASQUE, Bilbao 48011, Spain. (author)
  • Bihlmayer, GustavPeter Grunberg Inst, JARA, D-52425 Julich, Germany.;Inst Adv Simulat Forschungszentrum Julich, JARA, D-52425 Julich, Germany. (author)
  • Weschke, EugenHelmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany. (author)
  • Lake, BellaHelmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany. (author)
  • Chulkov, Evgueni V.Donostia Int Phys Ctr DIPC, San Sebastian 20018, Spain.;Univ Pais Vasco UPVEHU, Facultad Ciencias Quim, Dept Polimeros & Mat Avanzados, Quim & Tecnol, San Sebastian 20080, Spain.;St Petersburg State Univ, St Petersburg 198504, Russia.;Tomsk State Univ, Tomsk, Russia. (author)
  • Morgenstern, MarkusRWTH Aachen Unvers, Inst Phys B 2, D-52074 Aachen, Germany.;RWTH Aachen Unvers, JARA FIT, D-52074 Aachen, Germany. (author)
  • Bauer, GüntherJohannes Kepler Univ Linz, Inst Halbleiter & Festkorperphys, Altenberger Str 69, A-4040 Linz, Austria. (author)
  • Springholz, GuntherJohannes Kepler Univ Linz, Inst Halbleiter & Festkorperphys, Altenberger Str 69, A-4040 Linz, Austria. (author)
  • Rader, OliverHelmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany. (author)
  • Johannes Kepler Univ Linz, Inst Halbleiter & Festkorperphys, Altenberger Str 69, A-4040 Linz, Austria.Helmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany. (creator_code:org_t)

Related titles

  • In:Advanced Materials: John Wiley & Sons33:420935-96481521-4095

Internet link

Find in a library

To the university's database

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view