Welcome to Hirschberger lab
ようこそ   ヒルシュベルガー研究室へ

Experimental Condensed Matter Physics and Materials Science

(Visualization by M. Ishida of RIKEN CEMS)
© 2020 RIKEN Center for Emergent Matter Science


We are interested in the effects of Berry curvature on physical properties of solids. Recently, we study the interplay between non-coplanar spin arrangements such as magnetic skyrmions, and the electronic band structure. Our toolbox includes

  • Material search, e.g. by symmetry principles or density functional theory calculations
  • Crystal synthesis and characterization
  • Ultra-high resolution electrical and thermal transport measurements
  • Extreme conditions: high DC and pulsed magnetic fields at user facilities in Japan, Europe, and the USA
  • Extreme conditions: low temperature experiments below 300 milli-Kelvin
  • Collaborations on quantum-beam scattering experiments

Current research topics

Amongst other directions, we are offering projects on the following issues to interested students and post-doctoral researchers:

  1. Search for new families of spin textures, such as topological knots, in high-symmetry frustrated magnets

  2. Development of ultra-low temperature setup for measurements of the thermal Hall effect in unconventional spin systems

  3. Development of bulk van-der-Waals materials with complex magnetic order

Contact us to learn more!

Current members and alumni

Leonie Spitz
Master Course

Shun Akatsuka
Master Course
M1 Student

Max Hirschberger
Associate Professor

Teaching and Lecture courses

Fall 2020: "Solid State Physics IV: Quantum mechanics and topology", The University of Tokyo, Dept. of Applied Physics
In collaboration with K. Usami
Office hours:
  1. Friday 10/30 15:00-16:00 (zoom)
  2. Friday 11/06 15:00-16:00 (zoom)
  3. Friday 11/13 15:00-16:00 (zoom)
Note: lecture notes are password-protected (password announced in lecture)

Lecture 8: Berry's phase in Quantum Mechanics

Lecture 9: Quantum Hall effect

Lecture 10: Quantum anomalous Hall effect and quantum spin-Hall effect

Lecture 11: Quantum spin-Hall effect and Topological Insulators

Lecture 11: Concluding remarks (pptx)

Lecture 12: Weyl semimetals

Assignment (Problem set)

Publication List (chronological)


  1. Enhanced thermal Hall conductivity below 1 Kelvin in the pyrochlore magnet Yb2Ti2O7.
    arXiv:1903.00595 (2019)
    Hirschberger M., Czajka P., Koohpayeh S.M., Wang W., and Ong N.P.
  2. 2021

  3. Large Hall and Nernst responses from thermally induced spin chirality in a spin-trimer ferromagnet.
    Proceedings of the National Academy of Sciences, Advanced online publication, 118 (33) e2023588118 - click! (2021)
    Kolincio K.K., Hirschberger M., Masell J., Gao S., Kikkawa A., Taguchi Y., Arima T.-h., Nagaosa N., and Tokura Y.
  4. Oscillations of the thermal conductivity observed in the spin-liquid state of α-RuCl3.
    Nature Physics 17, 915–919 (2021)
    Czajka P., Gao T., Hirschberger M., Lampen-Kelley P., Banerjee A., Yan J., Mandrus D.G., Nagler S.E., and Ong N.P.
  5. Robust noncoplanar magnetism in band filling-tuned (Nd1−xCax)2Mo2O7.
    Physical Review B 104, 024436 (2021)
    Hirschberger M., Kaneko Y., Spitz L., Nakajima T., Taguchi Y., and Tokura Y.
  6. Geometrical Hall effect and momentum-space Berry curvature from spin-reversed band pairs.
    Physical Review B (Letter) 103, L041111 (2021)
    Hirschberger M., Nomura, Y., Mitamura H., Miyake A., Koretsune T., Kaneko Y., Spitz L., Taguchi Y., Matsuo A., Kindo K., Arita R., Tokunaga M., and Tokura Y.
  7. Nanometric skyrmion lattice from anisotropic exchange interactions in a centrosymmetric host.
    New Journal of Physics 23, 023039 (2021)
    Hirschberger M., Hayami S. and Tokura Y.
  8. 2020

  9. Emergent electromagnetic induction in a helical-spin magnet.
    Nature 586, 232–236 (2020)
    Yokouchi T., Kagawa F., Hirschberger M., Otani Y., Nagaosa N., and Tokura Y.
  10. Topological Nernst effect of the two-dimensional skyrmion lattice.
    Physical Review Letters 125, 076602 (2020)
    Hirschberger M., Spitz L., Nomoto T., Kurumaji T., Gao S., Masell J., Nakajima T. Kikkawa A., Yamasaki Y., Sagayma H., Nakao H., Taguchi Y., Arita R., Arima T.-h., and Tokura Y.
  11. Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet.
    Nature Nanotechnology 15, 444–449 (2020)
    Khanh N. D., Nakajima T., Yu X. Z., Gao S., Shibata K., Hirschberger M., Yamasaki Y., Sagayama H., Nakao H., Peng L. C., Nakajima K., Takagi R., Arima T., Tokura Y., and Seki S.
  12. High-field depinned phase and planar Hall effect in skyrmion-host Gd2PdSi3.
    Physical Review B (Rapid) 101, 220401(R) (2020)
    Hirschberger M., Nakajima T., Kriener M., Kurumaji T., Spitz L., Gao S., Kikkawa A., Yamasaki Y., Sagayama H., Nakao H., Ohira-Kawamura S., Taguchi Y., Arima T.-h., and Tokura Y.
  13. 2019

  14. Skyrmion phase and competing magnetic orders on a breathing kagome lattice.
    Nature Communications 10, 5831 (2019)
    Hirschberger M.*, Nakajima T.*, Gao S., Peng L., Kikkawa A., Kurumaji T., Kriener M., Yamasaki Y., Sagayama H., Nakao H., Ohishi K., Kakurai K., Taguchi Y., Yu X., Arima T., and Tokura Y.
  15. Ordering phenomena of spin trimers accompanied by large geometrical Hall effect.
    Physical Review B (Rapid) 100, 241115(R) (2019)
    Gao S.*, Hirschberger M.*, Zaharko O., Nakajima T., Kurumaji T., Kikkawa A., Shiogai J., Tsukazaki A., Kimura S., Awaji S., Taguchi Y., Arima T.-h., and Tokura Y.
  16. Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet.
    Science 365, 914-918 (2019)
    Kurumaji T.*, Nakajima T.*, Hirschberger M., Kikkawa A., Yamasaki Y., Sagayama H., Nakao H., Taguchi Y., Arima T., and Tokura Y.
  17. Ultra-small moment incommensurate spin density wave order masking a ferromagnetic quantum critical point in NbFe2.
    Physical Review Letters 123, 247203 (2019)
    Niklowitz P.G., Hirschberger M., Lucas M., Cermak P., Schneidewind A., Faulhaber E., Mignot J.-M., Duncan W.J., Neubauer A., Pfleiderer C., and Grosche F.M.
  18. A gap-protected zero-Hall effect state in the quantum limit of the non-symmorphic metal KHgSb.
    Nature Materials 18, 443 (2019)
    Liang S., Kushwaha S., Gao T., Hirschberger M., Li J., Wang Z., Stolze K., Skinner B., Bernevig B.A., Cava R.J., and Ong N.P.
  19. 2018

  20. Quantum tricritical points in NbFe2
    Nature Physics 14, 62 (2018)
    Friedemann S., Duncan W.J., Hirschberger M., Bauer T.W., Kuechler R., Neubauer A., Brando M., Pfleiderer C., and Grosche F.M.
  21. 2017

  22. The Chiral Anomaly Factory: Creating Weyls with a Magnetic Field.
    Physical Review B 95, 161306 (2017)
    Cano J., Bradlyn B., Wang Z., Hirschberger M., Ong N.P., and Bernevig B.A.
  23. Crystal growth and stoichiometry-dependent properties of the ferromagnetic Weyl semimetal ZrCo2−xSn.
    Journal of Physics: Condensed Matter 29, 225702 (2017)
    Kushwaha S.K., Stolze K., Wang Z., Hirschberger M., Lin J., Bernevig B.A., Ong N.P., and Cava R.J.
  24. 2016

  25. The chiral anomaly and thermopower of Weyl fermions in the half-Heusler GdPtBi.
    Nature Materials 15, 1161–1165 (2016)
    Hirschberger M., Kushwaha S., Wang Z., Gibson Q., Liang S., Belvin C.A., Bernevig B.A., Cava R.J., and Ong N.P.
  26. Diamagnetic response in under-doped YBa2Cu3O6.6 in high magnetic fields.
    Proceedings of the National Academy of Sciences 113, 12667 (2016)
    Yu F., Hirschberger M., Loew T., Li G., Lawson B.J., Asaba T., Kemper J.B., Liang T., Porras J., Boebinger G.S., Singleton J., Keimer B., Li L., and Ong N.P.
  27. Time-reversal breaking Weyl fermions in magnetic Heuslers.
    Physical Review Letters 117, 236401 (2016)
    Wang Z., Vergniory M.G., Kushwaha S., Hirschberger M., Chulkov E.V., Ernst A., Ong N.P., Cava R.J., and Bernevig B.A.
  28. Anomalous Nernst Effect in the Dirac Semimetal Cd3As2
    Physical Review Letters 118, 136601 (2016)
    Liang T., Lin J., Gibson Q., Gao T., Hirschberger M., Liu M., Cava R.J., and Ong N.P.
  29. 2015

  30. Large thermal Hall conductivity of neutral spin excitations in a frustrated quantum magnet.
    Science 348, 106-109 (2015)
    Hirschberger M., Krizan J.W., Cava R.J., and Ong N.P.
  31. Thermal Hall Effect of Spin Excitations in a Kagome Magnet.
    Physical Review Letters 115, 106603 (2015)
    Hirschberger M., Chisnell R., Lee Y.S., and Ong N.P.
  32. Evidence for the chiral anomaly in the Dirac semimetal Na3Bi.
    Science 350, 413-416 (2015)
    Xiong J., Kushwaha S.K., Liang T., Krizan J.W., Hirschberger M., Wang W., Cava R.J., and Ong N.P.
  33. Three-dimensional Dirac semimetals: Design principles and predictions of new materials.
    Physical Review B 91, 205128 (2015)
    Gibson Q.D., Schoop L.M., Muechler L., Xie L.S., Hirschberger M., Ong N.P., Car R., and Cava R.J.
  34. Correlation of crystal quality and extreme magnetoresistance of WTe2.
    Europhysics Letters 110, 67002 (2015)
    Ali M.N., Schoop L.M., Xiong J., Flynn S., Gibson Q.D., Hirschberger M., Ong N.P., and Cava R.J.
  35. Dirac metal to topological metal transition at a structural phase change in Au2Pb and prediction of Z2 topology for the superconductor.
    Physical Review B 91, 214517 (2015)
    Schoop L.M., Xie L.S., Chen R.S., Gibson Q.D., Lapidus S.H., Kimchi I., Hirschberger M., Haldolaarachchige N., Ali M.N., Belvin C.A., Liang T., Neaton J.B., Ong N.P., Vishwanath A., and Cava R.J.
  36. Spin dynamics and spin freezing at ferromagnetic quantum phase transitions.
    The European Physical Journal Special Topics 224, 1041-1060 (2015)
    Schmakat P., Wagner M., Ritz R., Bauer A., Brando M., Deppe M., Duncan W., Duvinage C., Franz C., Geibel C., Grosche F.M., Hirschberger M., Hradil K., Meven M., Neubauer A., Schulz M., Senyshyn A., Süllow S., Pedersen B., Böni P., and Pfleiderer C.
  37. 2014

  38. Large, non-saturating magnetoresistance in WTe2.
    Nature 514, 205-208 (2014)
    Ali M.N., Xiong J., Flynn S., Tao J., Gibson Q.D., Schoop L.M., Liang T., Haldolaarachchige N., Hirschberger M., Ong N.P., and Cava R.J.
  39. Paramagnetic to ferromagnetic phase transition in lightly Fe-doped Cr2B.
    Physical Review B 89, 224417 (2014)
    Schoop L.M., Hirschberger M., Tao J., Felser C., Ong N.P., and Cava R.J.
  40. 2013

  41. Evidence for massive bulk Dirac fermions in Pb1−xSnxSe from Nernst and thermopower experiments.
    Nature Communications 4, 2696 (2013)
    Liang T., Gibson Q.D., Xiong J., Hirschberger M., Koduvayur S.P., Cava R.J., and Ong N.P.
  42. 2012

  43. Ferrimagnetism in Fe-rich NbFe2.
    Physical Review B 85, 115137 (2012)
    Haynes T.D., Maskery I., Butchers M.W., Duffy J.A., Taylor J.W., Giblin S.R., Utfeld C., Laverock J., Dugdale S.B., Sakurai Y., Itou M., Pfleiderer C., Hirschberger M., Neubauer A., Duncan W., and Grosche F.M.