CCQ: Publications

122 Publications

Large Band Edge Tunability in Colloidal Nanoplatelets

Q. Zhou, Y. Cho, S. Yang, E. Weiss, T. Berkelbach, P. Darancet

Nano Letters, 19: 7124

September 23, 2019

Superconducting order parameter of the nodal-line semimetal NaAlSi

L. Muechler, Zurab Guguchia, Jean-Christophe Orain, Juergen Nuss, Leslie M. Schoop, Ronny Thomale, Fabian O. von Rohr

arXiv:1909.06875

September 15, 2019

Study of the Two-Dimensional Frustrated J1-J2 Model with Neural Network Quantum States

Kenny Choo, Titus Neupert, G. Carleo

arXiv:1903.06713

Physical Review B, 100, 125124

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2019

Study of the Two-Dimensional Frustrated J1-J2 Model with Neural Network Quantum States

@article{choo_two-dimensional_2019,
	title = {Two-dimensional frustrated \$\{{J}\}\_\{1\}{\textbackslash}text\{{\textbackslash}ensuremath\{-\}\}\{{J}\}\_\{2\}\$ model studied with neural network quantum states},
	volume = {100},
	url = {https://link.aps.org/doi/10.1103/PhysRevB.100.125124},
	doi = {10.1103/PhysRevB.100.125124},
	abstract = {The use of artificial neural networks to represent quantum wave functions has recently attracted interest as a way to solve complex many-body problems. The potential of these variational parametrizations has been supported by analytical and numerical evidence in controlled benchmarks. While approaching the end of the early research phase in this field, it becomes increasingly important to show how neural-network states perform for models and physical problems that constitute a clear open challenge for other many-body computational methods. In this paper, we start addressing this aspect, concentrating on a presently unsolved model describing two-dimensional frustrated magnets. Using a fully convolutional neural network model as a variational ansätz, we study the frustrated spin-1/2J1−J2 Heisenberg model on the square lattice. We demonstrate that the resulting predictions for both ground-state energies and properties are competitive with, and often improve upon, existing state-of-the-art methods. In a relatively small region in the parameter space, corresponding to the maximally frustrated regime, our ansätz exhibits comparatively good but not the best performance. The gap between the complexity of the models adopted here and those routinely adopted in deep-learning applications is, however, still substantial, such that further improvements in future generations of neural-network quantum states are likely to be expected.},
	number = {12},
	urldate = {2019-10-03},
	journal = {Physical Review B},
	author = {Choo, Kenny and Neupert, Titus and Carleo, Giuseppe},
	month = sep,
	year = {2019},
	pages = {125124}
}

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Magnetic response of Sr2RuO4: quasi-local spin fluctuations due to Hund’s coupling

H. Strand, M. Zingl, N. Wentzell, O. Parcollet, A. Georges

arXiv:1904.07324

Phys. Rev. B, 100, 125120

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September 10, 2019

Magnetic response of Sr2RuO4: quasi-local spin fluctuations due to Hund’s coupling

@article{PhysRevB.100.125120,
  title = {Magnetic response of ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$: Quasi-local spin fluctuations due to Hund's coupling},
  author = {Strand, Hugo U. R. and Zingl, Manuel and Wentzell, Nils and Parcollet, Olivier and Georges, Antoine},
  journal = {Phys. Rev. B},
  volume = {100},
  issue = {12},
  pages = {125120},
  numpages = {7},
  year = {2019},
  month = {Sep},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevB.100.125120},
  url = {https://link.aps.org/doi/10.1103/PhysRevB.100.125120}
}

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Strong Orbital Polarization in a Cobaltate-Titanate Oxide Heterostructure

S. Lee, A. T. Lee, A. Georgescu, G. Fabbris, M. G. Han, Y. Zhu, J. W. Freeland, A. S. Disa, Yi. Jia, M. P.M. Dean, F. J. Walker, S. Ismail-Beigi, C. H. Ahn

Physical Review Letters, 123:117201

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September 10, 2019

Strong Orbital Polarization in a Cobaltate-Titanate Oxide Heterostructure

@article{PhysRevLett.123.117201,
  title = {Strong Orbital Polarization in a Cobaltate-Titanate Oxide Heterostructure},
  author = {Lee, Sangjae and Lee, Alex Taekyung and Georgescu, Alexandru B. and Fabbris, Gilberto and Han, Myung-Geun and Zhu, Yimei and Freeland, John W. and Disa, Ankit S. and Jia, Yichen and Dean, Mark P. M. and Walker, Frederick J. and Ismail-Beigi, Sohrab and Ahn, Charles H.},
  journal = {Phys. Rev. Lett.},
  volume = {123},
  issue = {11},
  pages = {117201},
  numpages = {7},
  year = {2019},
  month = {Sep},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevLett.123.117201},
  url = {https://link.aps.org/doi/10.1103/PhysRevLett.123.117201}
}

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Combined spontaneous symmetry-breaking and symmetry-protected topological order from cluster charge interaction

C. Peng, R. Q. He, Y. He, Z. Y. Lu

arXiv:1909.03025

September 8, 2019

Strongly correlated materials from a numerical renormalization group perspective: How the Fermi-liquid state of Sr2RuO4 emerges

F. B. Kugler, M. Zingl, H. Strand, S.-S. B. Lee, J. von Delft, A. Georges

arXiv:1909.02389

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September 5, 2019

Strongly correlated materials from a numerical renormalization group perspective: How the Fermi-liquid state of Sr2RuO4 emerges

@ARTICLE{2019arXiv190902389K,
       author = {{Kugler}, Fabian B. and {Zingl}, Manuel and {Strand}, Hugo U.~R. and
         {Lee}, Seung-Sup B. and {von Delft}, Jan and {Georges}, Antoine},
        title = "{Strongly correlated materials from a numerical renormalization group perspective: How the Fermi-liquid state of Sr$_2$RuO$_4$ emerges}",
      journal = {arXiv e-prints},
     keywords = {Condensed Matter - Strongly Correlated Electrons},
         year = "2019",
        month = "Sep",
          eid = {arXiv:1909.02389},
        pages = {arXiv:1909.02389},
archivePrefix = {arXiv},
       eprint = {1909.02389},
 primaryClass = {cond-mat.str-el},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2019arXiv190902389K},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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Imaginary-time matrix product state impurity solver in a real material calculation: Spin-orbit coupling in Sr2RuO4

N.-O. Linden, M. Zingl, C. Hubig, O. Parcollet, U. Schollwöck

arXiv:1909.02503

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September 5, 2019

Imaginary-time matrix product state impurity solver in a real material calculation: Spin-orbit coupling in Sr2RuO4

@ARTICLE{2019arXiv190902503L,
       author = {{Linden}, Nils-Oliver and {Zingl}, Manuel and {Hubig}, Claudius and
         {Parcollet}, Olivier and {Schollw{\"o}ck}, Ulrich},
        title = "{Imaginary-time matrix product state impurity solver in a real material calculation: Spin-orbit coupling in Sr$_2$RuO$_4$}",
      journal = {arXiv e-prints},
     keywords = {Condensed Matter - Strongly Correlated Electrons},
         year = "2019",
        month = "Sep",
          eid = {arXiv:1909.02503},
        pages = {arXiv:1909.02503},
archivePrefix = {arXiv},
       eprint = {1909.02503},
 primaryClass = {cond-mat.str-el},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2019arXiv190902503L},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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Modular Arithmetic with Nodal Lines: Drumhead Surface States in ZrSiTe

L. Muechler, Andreas Topp, Raquel Queiroz, Maxim Krivenkov, Andrei Varykhalov, J. Cano, Christian R. Ast, Leslie M. Schoop

arXiv:1909.02154

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September 4, 2019

Modular Arithmetic with Nodal Lines: Drumhead Surface States in ZrSiTe

We study the electronic structure of the nodal line semimetal ZrSiTe both experimentally and theoretically. We find two different surface states in ZrSiTe - topological drumhead surface states and trivial floating band surface states. Using the spectra of Wilson loops, we show that a non-trivial Berry phase that exists in a confined region within the Brillouin Zone gives rise to the topological drumhead-type surface states. The ℤ2 structure of the Berry phase induces a ℤ2 'modular arithmetic' of the surface states, allowing surface states deriving from different nodal lines to hybridize and gap out, which can be probed by a set of Wilson loops. Our findings are confirmed by ab-initio calculations and angle-resolved photoemission experiments, which are in excellent agreement with each other and the topological analysis. This is the first complete characterization of topological surface states in the family of square-net based nodal line semimetals and thus fundamentally increases the understanding of the topological nature of this growing class of topological semimetals.

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Quantum Natural Gradient

J. Stokes, Josh Izaac, Nathan Killoran, G. Carleo

arXiv:1909.02108

2019

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