Towards microscopic control of the magnetic exchange coupling at the surface of a topological insulator

Standard

Towards microscopic control of the magnetic exchange coupling at the surface of a topological insulator. / Rüßmann, Philipp; Mahatha, Sanjoy K.; Sessi, Paolo et al.

In: JPhys Materials, Vol. 1, No. 1, 015002, 12.2018.

Research output: Contribution to journal › Article › peer-review

Harvard

Rüßmann, P, Mahatha, SK, Sessi, P, Valbuena, MA, Bathon, T, Fauth, K, Godey, S, Mugarza, A, Kokh, KA, Tereshchenko, OE, Gargiani, P, Valvidares, M, Jiménez, E, Brookes, NB, Bode, M, Bihlmayer, G, Blügel, S, Mavropoulos, P, Carbone, C & Barla, A 2018, 'Towards microscopic control of the magnetic exchange coupling at the surface of a topological insulator', JPhys Materials, vol. 1, no. 1, 015002. https://doi.org/10.1088/2515-7639/aad02a

APA

Rüßmann, P., Mahatha, S. K., Sessi, P., Valbuena, M. A., Bathon, T., Fauth, K., Godey, S., Mugarza, A., Kokh, K. A., Tereshchenko, O. E., Gargiani, P., Valvidares, M., Jiménez, E., Brookes, N. B., Bode, M., Bihlmayer, G., Blügel, S., Mavropoulos, P., Carbone, C., & Barla, A. (2018). Towards microscopic control of the magnetic exchange coupling at the surface of a topological insulator. JPhys Materials, 1(1), [015002]. https://doi.org/10.1088/2515-7639/aad02a

Vancouver

Rüßmann P, Mahatha SK, Sessi P, Valbuena MA, Bathon T, Fauth K et al. Towards microscopic control of the magnetic exchange coupling at the surface of a topological insulator. JPhys Materials. 2018 Dec;1(1):015002. doi: 10.1088/2515-7639/aad02a

Author

Rüßmann, Philipp ; Mahatha, Sanjoy K. ; Sessi, Paolo et al. / Towards microscopic control of the magnetic exchange coupling at the surface of a topological insulator. In: JPhys Materials. 2018 ; Vol. 1, No. 1.

BibTeX

@article{7f87c572c16f415d84ad4258d9ee35fe,

title = "Towards microscopic control of the magnetic exchange coupling at the surface of a topological insulator",

abstract = "Magnetically doped topological insulators may produce novel states of electronic matter, where for instance the quantum anomalous Hall effect state can be realized. Pivotal to this goal is a microscopic control over the magnetic state, defined by the local electronic structure of the dopants and their interactions. We report on the magnetic coupling among Mn or Co atoms adsorbed on the surface of the topological insulator Bi2Te3. Our findings uncover the mechanisms of the exchange coupling between magnetic atoms coupled to the topological surface state in strong topological insulators. The combination of x-ray magnetic circular dichroism and ab initio calculations reveals that the sign of the magnetic coupling at short adatom-adatom distances is opposite for Mn with respect to Co. For both elements, the magnetic exchange reverses its sign at a critical distance between magnetic adatoms, as a result of the interplay between superexchange, double exchange and Ruderman-Kittel-Kasuya-Yoshida interactions.",

keywords = "Density functional theory (DFT), Magnetic exchange interaction, Quantum anomalous Hall effect, Ruderman-Kittel-Kasuya-Yoshida (RKKY) interaction, Topological insulators, X-ray magnetic circular dichroism (XMCD)",

author = "Philipp R{\"u}{\ss}mann and Mahatha, {Sanjoy K.} and Paolo Sessi and Valbuena, {Miguel A.} and Thomas Bathon and Kai Fauth and Sylvie Godey and Aitor Mugarza and Kokh, {Konstantin A.} and Tereshchenko, {Oleg E.} and Pierluigi Gargiani and Manuel Valvidares and Erika Jim{\'e}nez and Brookes, {Nicholas B.} and Matthias Bode and Gustav Bihlmayer and Stefan Bl{\"u}gel and Phivos Mavropoulos and Carlo Carbone and Alessandro Barla",

year = "2018",

month = dec,

doi = "10.1088/2515-7639/aad02a",

language = "English",

volume = "1",

journal = "JPhys Materials",

issn = "2515-7639",

publisher = "IOP Publishing Ltd.",

number = "1",

}

RIS

TY - JOUR

T1 - Towards microscopic control of the magnetic exchange coupling at the surface of a topological insulator

AU - Rüßmann, Philipp

AU - Mahatha, Sanjoy K.

AU - Sessi, Paolo

AU - Valbuena, Miguel A.

AU - Bathon, Thomas

AU - Fauth, Kai

AU - Godey, Sylvie

AU - Mugarza, Aitor

AU - Kokh, Konstantin A.

AU - Tereshchenko, Oleg E.

AU - Gargiani, Pierluigi

AU - Valvidares, Manuel

AU - Jiménez, Erika

AU - Brookes, Nicholas B.

AU - Bode, Matthias

AU - Bihlmayer, Gustav

AU - Blügel, Stefan

AU - Mavropoulos, Phivos

AU - Carbone, Carlo

AU - Barla, Alessandro

PY - 2018/12

Y1 - 2018/12

N2 - Magnetically doped topological insulators may produce novel states of electronic matter, where for instance the quantum anomalous Hall effect state can be realized. Pivotal to this goal is a microscopic control over the magnetic state, defined by the local electronic structure of the dopants and their interactions. We report on the magnetic coupling among Mn or Co atoms adsorbed on the surface of the topological insulator Bi2Te3. Our findings uncover the mechanisms of the exchange coupling between magnetic atoms coupled to the topological surface state in strong topological insulators. The combination of x-ray magnetic circular dichroism and ab initio calculations reveals that the sign of the magnetic coupling at short adatom-adatom distances is opposite for Mn with respect to Co. For both elements, the magnetic exchange reverses its sign at a critical distance between magnetic adatoms, as a result of the interplay between superexchange, double exchange and Ruderman-Kittel-Kasuya-Yoshida interactions.

AB - Magnetically doped topological insulators may produce novel states of electronic matter, where for instance the quantum anomalous Hall effect state can be realized. Pivotal to this goal is a microscopic control over the magnetic state, defined by the local electronic structure of the dopants and their interactions. We report on the magnetic coupling among Mn or Co atoms adsorbed on the surface of the topological insulator Bi2Te3. Our findings uncover the mechanisms of the exchange coupling between magnetic atoms coupled to the topological surface state in strong topological insulators. The combination of x-ray magnetic circular dichroism and ab initio calculations reveals that the sign of the magnetic coupling at short adatom-adatom distances is opposite for Mn with respect to Co. For both elements, the magnetic exchange reverses its sign at a critical distance between magnetic adatoms, as a result of the interplay between superexchange, double exchange and Ruderman-Kittel-Kasuya-Yoshida interactions.

KW - Density functional theory (DFT)

KW - Magnetic exchange interaction

KW - Quantum anomalous Hall effect

KW - Ruderman-Kittel-Kasuya-Yoshida (RKKY) interaction

KW - Topological insulators

KW - X-ray magnetic circular dichroism (XMCD)

UR - http://www.scopus.com/inward/record.url?scp=85077496865&partnerID=8YFLogxK

U2 - 10.1088/2515-7639/aad02a

DO - 10.1088/2515-7639/aad02a

M3 - Article

AN - SCOPUS:85077496865

VL - 1

JO - JPhys Materials

JF - JPhys Materials

SN - 2515-7639

IS - 1

M1 - 015002

ER -

ID: 28463986