Bio


I received my doctoral title from the Martin-Luther University Halle-Wittenberg (Germany) in December 2016 and joined the group of Prof. Philipp Werner at the University of Fribourg (Switzerland) shortly after. After receiving a Feodor-Lynen fellowship from the Alexander-von-Humboldt Foundation, I joined Prof. Thomas Devereaux’s group at Stanford University in February 2019, where I am currently conducting independent research.

Honors & Awards


  • Ambizione Grant, Swiss National Science Foundation (August 2020)
  • Feodor Lynen postdoctoral fellowship, Alexander-von-Humboldt foundation (2017)
  • Luther Award for outstanding PhD thesis, Martin-Luther University Halle-Wittenberg (2016)
  • Anton-Wilhelm-Amo Award (outstanding master thesis), Martin-Luther-University Halle-Wittenberg (2014)
  • Scholarship by federal state Sachsen-Anhalt, Government of Sachsen-Anhalt (Germany) (2010-2012)
  • Gustav-Mie Award for an outstanding Bachelor’s degree, Martin-Luther-University Halle-Wittenberg (2010)

Professional Education


  • Master of Science, MartinLutherUniversitat (2010)
  • Bachelor of Science, MartinLutherUniversitat (2010)
  • Doctor of Science, MartinLutherUniversitat (2016)

Projects


  • Chiral light shows Berry curvature in 2D materials, Stanford University
  • Topological states caught in the act, Stanford University

    Many attempts have been made to turn graphene into a topological insulator, an exotic material that conducts on its surface yet insulates in its interior. The marriage of topological insulators with the unique electronic structure of graphene could offer a rich experimental playground for exploring many novel quantum phenomena as well as applications such as fault-tolerant quantum computing. But realizing and demonstrating topological states in graphene remains a significant experimental challenge. As a step toward overcoming this hurdle, we propose a new probe of transient topological states in graphene that relies on spectroscopic analysis of circularly polarized light.

    Our analysis focuses on a state-of-the-art tool for measuring the energy and momenta of electrons known as time- and angle-resolved photoemission spectroscopy (TR-ARPES). In this technique, one laser excites electrons in a sample and a subsequent laser probes the evolving electronic behavior. Our proposal to probe topological states is based on circular dichroism in TR-ARPES. Through simulations, we show that a circularly polarized excitation laser can induce a topological insulating state in graphene. This leaves a signature in the graphene that reveals itself via a circularly polarized probe laser: One polarization direction will be absorbed more than the other.

    Analysis of circular dichroism in TR-ARPES-based investigations can therefore provide a powerful tool for realizing and investigating transient topological properties in graphene.

    Location

    Stanford University

All Publications


  • Spectral properties and enhanced superconductivity in renormalized Migdal-Eliashberg theory PHYSICAL REVIEW B Nosarzewski, B., Schuler, M., Devereaux, T. P. 2021; 103 (2)
  • Correlation-Assisted Quantized Charge Pumping Physical Review B Marks, J., Schüler, M., Budich, J. C., Devereaux, T. P. 2021; 103 (3): 035112
  • Gauge invariance of light-matter interactions in first-principle tight-binding models Physical Review B Schuler, M., Marks, J. A., Murakami, Y., Jia, C., Devereaux, T. P. 2021; 103 (15)
  • Dynamical signatures of symmetry protected topology following symmetry breaking ArXiV Marks, J. A., Schüler, M., Devereaux, T. P. 2021
  • NESSi: The Non-Equilibrium Systems Simulation package COMPUTER PHYSICS COMMUNICATIONS Schuler, M., Golez, D., Murakami, Y., Bittner, N., Herrmann, A., Strand, H. R., Werner, P., Eckstein, M. 2020; 257
  • Revealing Hidden Orbital Pseudospin Texture with Time-Reversal Dichroism in Photoelectron Angular Distributions PHYSICAL REVIEW LETTERS Beaulieu, S., Schusser, J., Dong, S., Schuler, M., Pincelli, T., Dendzik, M., Maklar, J., Neef, A., Ebert, H., Hricovini, K., Wolf, M., Braun, J., Rettig, L., Minar, J., Ernstorfer, R. 2020; 125 (21): 216404

    Abstract

    We performed angle-resolved photoemission spectroscopy (ARPES) of bulk 2H-WSe_{2} for different crystal orientations linked to each other by time-reversal symmetry. We introduce a new observable called time-reversal dichroism in photoelectron angular distributions (TRDAD), which quantifies the modulation of the photoemission intensity upon effective time-reversal operation. We demonstrate that the hidden orbital pseudospin texture leaves its imprint on TRDAD, due to multiple orbital interference effects in photoemission. Our experimental results are in quantitative agreement with both the tight-binding model and state-of-the-art fully relativistic calculations performed using the one-step model of photoemission. While spin-resolved ARPES probes the spin component of entangled spin-orbital texture in multiorbital systems, we unambiguously demonstrate that TRDAD reveals its orbital pseudospin texture counterpart.

    View details for DOI 10.1103/PhysRevLett.125.216404

    View details for Web of Science ID 000591183400014

    View details for PubMedID 33274965

  • How Circular Dichroism in Time- and Angle-Resolved Photoemission Can Be Used to Spectroscopically Detect Transient Topological States in Graphene PHYSICAL REVIEW X Schuler, M., De Giovannini, U., Huebener, H., Rubio, A., Sentef, M. A., Devereaux, T. P., Werner, P. 2020; 10 (4)
  • High-harmonic generation in spin-orbit coupled systems PHYSICAL REVIEW B Lysne, M., Murakami, Y., Schuler, M., Werner, P. 2020; 102 (8)
  • Local Berry curvature signatures in dichroic angle-resolved photoelectron spectroscopy from two-dimensional materials SCIENCE ADVANCES Schueler, M., De Giovannini, U., Huebener, H., Rubio, A., Sentef, M. A., Werner, P. 2020; 6 (9): eaay2730

    Abstract

    Topologically nontrivial two-dimensional materials hold great promise for next-generation optoelectronic applications. However, measuring the Hall or spin-Hall response is often a challenge and practically limited to the ground state. An experimental technique for tracing the topological character in a differential fashion would provide useful insights. In this work, we show that circular dichroism angle-resolved photoelectron spectroscopy provides a powerful tool that can resolve the topological and quantum-geometrical character in momentum space. In particular, we investigate how to map out the signatures of the momentum-resolved Berry curvature in two-dimensional materials by exploiting its intimate connection to the orbital polarization. A spin-resolved detection of the photoelectrons allows one to extend the approach to spin-Chern insulators. The present proposal can be extended to address topological properties in materials out of equilibrium in a time-resolved fashion.

    View details for DOI 10.1126/sciadv.aay2730

    View details for Web of Science ID 000518999500014

    View details for PubMedID 32158939

    View details for PubMedCentralID PMC7048418

  • Ultrafast nonequilibrium evolution of excitonic modes in semiconductors PHYSICAL REVIEW B Murakami, Y., Schueler, M., Takayoshi, S., Werner, P. 2020; 101 (3)
  • Quench dynamics and Hall response of interacting Chern insulators PHYSICAL REVIEW B Schueler, M., Budich, J., Werner, P. 2019; 100 (4)
  • Adiabatic Preparation of a Correlated Symmetry-Broken Initial State with the Generalized Kadanoff-Baym Ansatz PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS Tuovinen, R., Golez, D., Schuler, M., Werner, P., Eckstein, M., Sentef, M. A. 2019; 256 (7)
  • Truncating the memory time in nonequilibrium dynamical mean field theory calculations PHYSICAL REVIEW B Schueler, M., Eckstein, M., Werner, P. 2018; 97 (24)
  • Nonthermal switching of charge order: Dynamical slowing down and optimal control PHYSICAL REVIEW B Schuler, M., Murakami, Y., Werner, P. 2018; 97 (15)
  • Spectral properties from Matsubara Green's function approach: Application to molecules PHYSICAL REVIEW B Schuler, M., Pavlyukh, Y. 2018; 97 (11)
  • Tracing the nonequilibrium topological state of Chern insulators PHYSICAL REVIEW B Schuler, M., Werner, P. 2017; 96 (15)
  • Many-body localization phase in a spin-driven chiral multiferroic chain PHYSICAL REVIEW B Stagraczynski, S., Chotorlishvili, L., Schueler, M., Mierzejewski, M., Berakdar, J. 2017; 96 (5)
  • Functionalizing Fe adatoms on Cu(001) as a nanoelectromechanical system NEW JOURNAL OF PHYSICS Schueler, M., Chotorlishvili, L., Melz, M., Saletsky, A., Klavsyuk, A., Toklikishvili, Z., Berakdar, J. 2017; 19
  • Entanglement dynamics of two nitrogen vacancy centers coupled by a nanomechanical resonator JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS Toklikishvili, Z., Chotorlishvili, L., Mishra, S. K., Stagraczynski, S., Schueler, M., Rau, A. P., Berakdar, J. 2017; 50 (5)
  • Energy-loss spectroscopy of C-60 fullerenes with twisted electrons: Influence of orbital-angular-momentum transfer on plasmon generation PHYSICAL REVIEW A Schueler, M., Berakdar, J. 2016; 94 (5)
  • Femtosecond dynamics of correlated many-body states in C-60 fullerenes NEW JOURNAL OF PHYSICS Usenko, S., Schuler, M., Azima, A., Jakob, M., Lazzarino, L. L., Pavlyukh, Y., Przystawik, A., Drescher, M., Laarmann, T., Berakdar, J. 2016; 18
  • Superadiabatic quantum heat engine with a multiferroic working medium PHYSICAL REVIEW E Chotorlishvili, L., Azimi, M., Stagraczynski, S., Toklikishvili, Z., Schueler, M., Berakdar, J. 2016; 94 (3): 032116

    Abstract

    A quantum thermodynamic cycle with a chiral multiferroic working substance such as LiCu_{2}O_{2} is presented. Shortcuts to adiabaticity are employed to achieve an efficient, finite-time quantum thermodynamic cycle, which is found to depend on the spin ordering. The emergent electric polarization associated with the chiral spin order, i.e., the magnetoelectric coupling, renders possible steering of the spin order by an external electric field and hence renders possible an electric-field control of the cycle. Due to the intrinsic coupling between the spin and the electric polarization, the cycle performs an electromagnetic work. We determine this work's mean-square fluctuations, the irreversible work, and the output power of the cycle. We observe that the work mean-square fluctuations are increased with the duration of the adiabatic strokes, while the irreversible work and the output power of the cycle show a nonmonotonic behavior. In particular, the irreversible work vanishes at the end of the quantum adiabatic strokes. This fact confirms that the cycle is reversible. Our theoretical findings evidence the existence of a system inherent maximal output power. By implementing a Lindblad master equation we quantify the role of thermal relaxations on the cycle efficiency. We also discuss the role of entanglement encoded in the noncollinear spin order as a resource to affect the quantum thermodynamic cycle.

    View details for DOI 10.1103/PhysRevE.94.032116

    View details for Web of Science ID 000383160900002

    View details for PubMedID 27739759

  • Electron pair escape from fullerene cage via collective modes SCIENTIFIC REPORTS Schueler, M., Pavlyukh, Y., Bolognesi, P., Avaldi, L., Berakdar, J. 2016; 6: 24396

    Abstract

    Experiment and theory evidence a new pathway for correlated two-electron release from many-body compounds following collective excitation by a single photon. Using nonequilibrium Green's function approach we trace plasmon oscillations as the key ingredient of the effective electron-electron interaction that governs the correlated pair emission in a dynamic many-body environment. Results from a full ab initio implementation for C60 fullerene are in line with experimental observations. The findings endorse the correlated two-electron photoemission as a powerful tool to access electronic correlation in complex systems.

    View details for DOI 10.1038/srep24396

    View details for Web of Science ID 000374228100001

    View details for PubMedID 27086559

    View details for PubMedCentralID PMC4834545

  • Time-dependent many-body treatment of electron-boson dynamics: Application to plasmon-accompanied photoemission PHYSICAL REVIEW B Schueler, M., Berakdar, J., Pavlyukh, Y. 2016; 93 (5)
  • Second-order bosonic Kadanoff-Baym equations for plasmon-accompanied optical absorption Schueler, M., Pavlyukh, Y., IOP IOP PUBLISHING LTD. 2016
  • Disentangling multipole contributions to collective excitations in fullerenes PHYSICAL REVIEW A Schueler, M., Berakdar, J., Pavlyukh, Y. 2015; 92 (2)
  • Single-or double-electron emission within the Keldysh nonequilibrium Green's function and Feshbach projection operator techniques PHYSICAL REVIEW B Pavlyukh, Y., Schueler, M., Berakdar, J. 2015; 91 (15)
  • Nuclear-wave-packet dynamics mapped out by two-center interference in the HeH2+ molecule PHYSICAL REVIEW A Schueler, M., Pavlyukh, Y., Berakdar, J. 2014; 89 (6)
  • Generation and coherent control of pure spin currents via terahertz pulses APPLIED PHYSICS LETTERS Schueler, M., Berakdar, J. 2014; 104 (16)

    View details for DOI 10.1063/1.4873615

    View details for Web of Science ID 000335145600056

  • (e,2e) and (gamma,2e) experiments on C-60 Bolognesi, P., Pavlyukh, Y., Schueler, M., Berakdar, J., Avaldi, L., IOP IOP PUBLISHING LTD. 2014
  • Local Ionization Dynamics Traced by Photoassisted Scanning Tunneling Microscopy: A Theoretical Approach JOURNAL OF PHYSICAL CHEMISTRY LETTERS Schueler, M., Pavlyukh, Y., Berakdar, J. 2013; 4 (7): 1131–35

    Abstract

    For tracing the spatiotemporal evolution of electronic systems, we suggest and analyze theoretically a setup that exploits the excellent spatial resolution based on scanning tunneling microscopy techniques combined with the temporal resolution of femtosecond pump-probe photoelectron spectroscopy. As an example, we consider the laser-induced, local vibrational dynamics of a surface-adsorbed molecule. The photoelectrons released by a laser pulse can be collected by the scanning tip and utilized to access the spatiotemporal dynamics. Our proof-of-principle calculations are based on the solution of the time-dependent Schrödinger equation supported by the ab initio computation of the matrix elements determining the dynamics.

    View details for DOI 10.1021/jz400239k

    View details for Web of Science ID 000317317500013

    View details for PubMedID 26282032

  • A theoretical analysis of the spin dynamics of magnetic adatoms traced by time-resolved scanning tunneling spectroscopy NEW JOURNAL OF PHYSICS Schueler, M., Pavlyukh, Y., Berakdar, J. 2012; 14
  • Ultrafast control of inelastic tunneling in a double semiconductor quantum well APPLIED PHYSICS LETTERS Schueler, M., Pavlyukh, Y., Berakdar, J. 2010; 97 (17)

    View details for DOI 10.1063/1.3505502

    View details for Web of Science ID 000284233600024