* notable publication

Preprints

Stay tuned for updates on our research!

2024

• *Experimental evidence for Berry curvature multipoles in antiferromagnets Soumya Sankar, Ruizi Liu, Xue-Jian Gao, Qi-Fang Li, Caiyun Chen, Cheng-Ping Zhang, Jiangchang Zheng, Yi-Hsin Lin, Kun Qian, Ruo-Peng Yu, Xu Zhang, Zi Yang Meng, Kam Tuen Law, Qiming Shao, and Berthold Jäck,
  accepted for publication in PRX (2024)

2023

• *‘Visualizing the localized electrons of a kagome flat band’ C. Chen, J. Zheng, R.-P. Yu, S. Sankar, H.C. Po, K.T. Law, B. Jäck,
  Phys. Rev. Research 5, 043269 (2023)

• ‘Grain size in low loss superconducting Ta thin films on c-axis sapphire’
  S.G. Jones, N. Materise, K.W. Leung, X. Chen, J. Zheng, A. Gyenis, B. Jäck, C.R.H. McRae,
  Journal of Appied. Physics 134, 144402 (2023)

2022

• Evidence for Isotropic s-Wave Superconductivity in High-Entropy Alloys

  Casey K.W. Leung, Xiaofu Zhang, Fabian von Rohr, Rolf W. Lortz, Berthold Jäck
  Scientific Reports 12, 12773 (2022)

• *Evidence for a Monolayer Excitonic Insulator
  Yanyu Jia, Pengjie Wang, Cheng-Li Chiu, Zhida Song, Guo Yu, Berthold Jäck, Shiming Lei, Sebastian Klemenz, F. Alexandre Cevallos, Michael Onyszczak, Nadezhda Fishchenko, Xiaomeng Liu, Gelareh Farahi, Fang Xie, Yuanfeng Xu, Kenji Watanabe, Takashi Taniguchi, B. Andrei Bernevig, Robert J. Cava, Leslie M. Schoop, Ali Yazdani1, Sanfeng Wu
  Nature Physics (2022)

2021

• * Detecting and distinguishing Majorana zero modes with the scanning tunnelling microscope
  Berthold Jäck, Yonglong Xie, Ali Yazdani
  Nature Reviews Physics 3, 541–554 (2021)

• Microscopic Relaxation Channels in Materials for Superconducting Qubits
  A. Premkumar, C. Weiland, S. Hwang, B. Jäck, A.P.M. Place, I. Waluyo, A. Hunt, V. Bisogni, J. Pelliciari, A. Barbour, M.S. Miller, P. Russo, F. Camino, K. Kisslinger, X. Tong, M.S. Hybertsen, A.A. Houck, I. Jarrige
  Communications Materials 2, 72 (2021)

• New material platform for superconducting transmon qubits with coherence times exceeding 0.3 milliseconds 
  A.P.M. Place, L.V.H. Rodgers, P. Mundada, B.M. Smitham, M. Fitzpatrick, Z. Leng, A. Premkumar, J. Bryon, S. Sussman, G. Cheng, T. Madhavan, H.K. Babla, B. Jäck, A. Gyenis, N. Yao, R.J. Cava, N.P. de Leon, A.A. Houck,
  Nature Communications 12, 1779 (2021)

• Visualizing the multifractal wave functions of a disordered two-dimensional electron gas
  B. Jäck, F. Zinser, E.J. König, S.N.P. Wissing, A.B. Schmidt, M. Donath, K. Kern, C.R. Ast,
  Phys. Rev. Research 3, 013022 (2021)

2020

• *Tunneling spectroscopy of quantum spin liquids
  E.J. König, M.T. Randeria and B. Jäck,
  Phys. Rev. Lett. 125, 267206 (2020)

• Visualizing dissipative charge carrier dynamics at the nanoscale with superconducting charge qubit microscopy

  B. Jäck,
  Phys. Rev. Research 2, 043031 (2020)

• * Observation of backscattering induced by magnetism in a topological edge state
  B. Jäck, Y. Xie, B.A. Bernevig, A. Yazdani,
  PNAS 117, 16214-16218 (2020)
  
  

2019

• * Spectroscopic signatures of many-body correlations in magic angle twisted bilayer graphene
  Y. Xie, B. Lian, B. Jäck, X. Liu, C.-L. Chiu, K. Watanabe, T. Taniguchi, B.A. Bernevig, A. Yazdani,
  Nature 572, 101–105 (2019)

• * Observation of a Majorana zero mode in a topologically protected edge channel
  B. Jäck, Y. Xie, J. Li, S. Jeon, B.A. Bernevig, A. Yazdani,
  Science 364, 1255-1259 (2019)

2017

• * Quantum Brownian motion at strong dissipation probed by superconducting tunnel junctions
  B. Jäck, J. Senkpiel, M. Etzkorn, J. Ankerhold, C.R. Ast and K. Kern,
  Phys. Rev. Lett. 119, 147702, (2017)

2016

• Sensing the quantum limit in scanning tunneling spectroscopy
  C.R. Ast, B. Jäck, J. Senkpiel, M. Eltschka, M. Etzkorn and K. Kern,
  Nature Commun. 7, 13009 (2016)

• Josephson Critical Current in the Dynamical Coulomb Blockade Regime
  B. Jäck, E. Eltschka M. Assig, M. Etzkorn, C.R. Ast and K. Kern,
  Phys. Rev. B Rap. Commun. 93, 020504 (2016)

2015

• Superconducting STM tip in a Magnetic Field: Geometrically-Controlled Order of the Phase Transition
  M. Eltschka, B. Jäck, M. Assig, O.V. Kondrashov, M.A. Skvortsov, M. Etzkorn, C.R. Ast and K. Kern,
  Appl. Phys. Lett. 107, 122601 (2015)

• A Nanoscale Gigahertz Source Realized with Josephson Scanning Tunneling Microscopy
  B. Jäck, E. Eltschka M. Assig, M. Etzkorn, C.R. Ast and K. Kern,
  Appl. Phys. Lett. 106, 013109 (2015)

2014

• Probing Absolute Spin Polarization at the Nanoscale
  M. Eltschka, B. Jäck, M. Assig, O.V. Kondrashov, M.A. Skvortsov, M. Etzkorn, C.R. Ast and K. Kern,
  Nano Lett. 14, 7171 (2014)