Below you find my list of

You can also follow the links to my public author identifier page on to the arXiv, ORCID, ResearcherID and Google Scholar to find the list of my publications as recorded there (not complete), together with the number of citations and their individual citation measures. Please note that the citations and measures are usually outdated.

Papers

This is a complete list of my regular, peer reviewed papers. Click on the titles to expand the abstract of each paper.

Phys. Rev. B 95, 035108 (2017), arXiv:1610.03314

Spontaneous particle-hole symmetry breaking of correlated fermions on the Lieb lattice

M. Bercx, J. S. Hofmann, F. F. Assaad, T. C. Lang

We study spinless fermions with nearest-neighbor repulsive interactions (t-V model) on the two-dimensional three-band Lieb lattice. At half-filling, the free electronic band structure consists of a flat band at zero energy and a single cone with linear dispersion. The flat band is expected to be unstable upon inclusion of electronic correlations, and a natural channel is charge order. However, due to the three-orbital unit cell, commensurate charge order implies an imbalance of electron and hole densities and therefore doping away from half-filling. Our numerical results show that below a finite-temperature Ising transition a charge density wave with one electron and two holes per unit cell and its partner under particle-hole transformation are spontaneously generated. Our calculations are based on recent advances in auxiliary-field and continuous-time quantum Monte Carlo simulations that allow sign-free simulations of spinless fermions at half-filling. It is argued that particle-hole symmetry breaking provides a route to access levels of finite doping, without introducing a sign problem.

Phys. Rev. Lett. 117, 086404 (2016), arXiv:1604.03876

Interaction induced Dirac fermions from quadratic band touching in models of bilayer graphene

S. Pujari, T. C. Lang, G. Murthy, R. K. Kaul
Phys. Rev. B 89, 125121 (2014), arXiv:1311.5851

Entanglement Spectra of Interacting Fermions in Quantum Monte Carlo Simulations

F. F. Assaad, T. C. Lang, F. P. Toldin
Phys. Rev. Lett. 111, 066401 (2013), arXiv:1306.3258

Dimerized Solids and Resonating Plaquette Order in SU(N)-Dirac Fermions

T. C. Lang, Z. Y. Meng, A. Muramatsu, S. Wessel, F. F. Assaad
Phys. Rev. Lett. 111, 085504 (2013), arXiv:1305.2196

Magnetic Correlations in Short and Narrow Graphene Armchair Nanoribbons

M. Golor, C. Koop, T. C. Lang, S. Wessel, M. J. Schmidt
Phys. Rev. B 87, 245431 (2013), arXiv:1305.0559

Effective models for strong electronic correlations at graphene edges

M. J. Schmidt, M. Golor, T. C. Lang, S. Wessel
Phys. Rev. B 87, 155441 (2013), arXiv:1303.4259

Quantum Monte Carlo studies of edge magnetism in chiral graphene nanoribbons

M. Golor, T. C. Lang, S. Wessel
Phys. Rev. B 87, 205101 (2013), arXiv:1303.3425

Z2 topological invariants in two dimensions from quantum Monte Carlo

T. C. Lang, A. M. Essin, V. Gurarie, S. Wessel
Phys. Rev. Lett. 109, 126402 (2012), arXiv:1207.3783

Antiferromagnetism in the Hubbard Model on the Bernal-stacked Honeycomb Bilayer

T. C. Lang, Z. Y. Meng, M. M. Scherer, S. Uebelacker, F. F. Assaad, A. Muramatsu, C. Honerkamp, S. Wessel
Phys. Rev. B 85, 115132 (2012), arXiv:1111.3949

Quantum phase transitions in the Kane-Mele-Hubbard model

M. Hohenadler, Z. Y. Meng, T. C. Lang, S. Wessel, A. Muramatsu, F. F. Assaad
Phys. Rev. Lett. 106, 226401 (2011), arXiv:1101.1882

Dynamical Signatures of Edge-State Magnetism on Graphene Nanoribbons

H. Feldner, Z. Y. Meng, T. C. Lang, F. F. Assaad, S. Wessel, A. Honecker
Phys. Rev. Lett. 106, 100403 (2011), arXiv:1011.5063

Correlation Effects in Quantum Spin-Hall Insulators: A Quantum Monte Carlo Study

M. Hohenadler, T. C. Lang, F. F. Assaad
Nature 464, 847 (2010), arXiv:1003.5809

Quantum spin-liquid emerging in two-dimensional correlated Dirac fermions

Z. Y. Meng, T. C. Lang, S. Wessel, F. F. Assaad, A. Muramatsu
Phys. Rev. B 80, 045412 (2009), arXiv:0902.2922

Magnetic field induced semimetal-to-canted-antiferromagnet transition on the honeycomb lattice

M. Bercx, T. C. Lang, F. F. Assaad
Phys. Rev. B 76, 035116 (2007), arXiv:cond-mat/0702455

Diagrammatic Determinantal methods: projective schemes and applications to the Hubbard-Holstein model

F. F. Assaad, T. C. Lang
Physica B359, 1400 (2005), arXiv:cond-mat/0406715

Finite-temperature investigation of quarter filled ladder systems

C. Gabriel, E. Sherman, T. C. Lang, M. Aichhorn, H. G. Evertz

Proceedings, Reviews & Invited papers

Mod. Phys. Lett. B 28, 1430001 (2014), arXiv:1310.6064

The characterization of topological properties in Quantum Monte Carlo simulations of the Kane-Mele-Hubbard model

Z. Y. Meng, H.-H. Hung, T. C. Lang
Ann. Phys. 524, 118 (2012)

A quantum spin-liquid in correlated relativistic electrons

Z. Y. Meng, T. C. Lang, S. Wessel, F. F. Assaad, and A. Muramatsu
inSiDE 8, 28 (2010)

Exotic State in Correlated Relativistic Electrons

Z. Y. Meng, T. C. Lang, S. Wessel, F. F. Assaad, and A. Muramatsu
Lect. Notes Phys. 739, 357 (2008)

Autocorrelations in quantum Monte Carlo simulations of electron-phonon models

M. Hohenadler, T. C. Lang

Talks

This is a selection of talks I have given.

03/2014, APS March Meeting, Denver, CO

Metal-Insulator Transitions of Correlated Dirac Fermions from SU(2) to SU(N)

PDF
10/2013, Harvard CMT Seminar, Cambridge, MA

Dimerized Solids and Resonating Plaquette Order in SU(N)-Dirac Fermions

PDF
03/2013, APS March Meeting, Baltimore, MA

Topological parity invariant in interacting 2D systems from QMC

PDF
03/2013, APS March Meeting, Baltimore, MA

Edge-state magnetism in chiral graphene nanoribbons: a QMC study

PDF
02/2013, Graphene Research Center seminar, National University of Singapore, Singapore

Hubbard models on honeycomb structures

PDF
03/2012, APS March Meeting, Boston, MA

The Hubbard model on the honeycomb bilayer

PDF
03/2012, Condensed matter theory seminar, Amherst, MA

Correlation effects in quantum spin Hall insulators

PDF
09/2008, Condensed matter theory seminar, Toulouse

Breakdown of a valence bond solid on honeycomb layers

PDF

Posters

This is a selection of posters I have presented. Please note that these (might) contain errors and do not necessarily represent the final status as published in the corresponding paper, since they usually have been created at an intermediate stage of the research project.


Theses

These are my Diploma and Ph.D. theses:


Diese Seiten werden auf einem Server der Universitaet Innsbruck gehostet und unterstehen diesen Richtlinien.