Chen, Y. et al. Two-dimensional metal nanomaterials: synthesis, properties, and applications. Chem. Rev. 118, 6409–6455 (2018).
Gou, J. et al. Two-dimensional ferroelectricity in a single-element bismuth monolayer. Nature 617, 67–72 (2023).
Briggs, N. et al. Atomically thin half-van der Waals metals enabled by confinement heteroepitaxy. Nat. Mater. 19, 637–643 (2020).
Xing, Y. et al. Quantum Griffiths singularity of superconductor-metal transition in Ga thin films. Science 350, 542–545 (2015).
Jäck, B. et al. Observation of a Majorana zero mode in a topologically protected edge channel. Science 364, 1255–1259 (2019).
Maniyara, R. A. et al. Tunable plasmons in ultrathin metal films. Nat. Photon. 13, 328–333 (2019).
Zhu, F.-f et al. Epitaxial growth of two-dimensional stanene. Nat. Mater. 14, 1020–1025 (2015).
Ji, J. et al. Two-dimensional antimonene single crystals grown by van der Waals epitaxy. Nat. Commun. 7, 13352 (2016).
Chen, L. et al. Exceptional electronic transport and quantum oscillations in thin bismuth crystals grown inside van der Waals materials. Nat. Mater. 23, 741–746 (2024).
Novoselov, K. S. et al. Electric field effect in atomically thin carbon films. Science 306, 666–669 (2004).
Geim, A. K. & Grigorieva, I. V. Van der Waals heterostructures. Nature 499, 419–425 (2013).
Liu, Y. et al. Van der Waals heterostructures and devices. Nat. Rev. Mater. 1, 16042 (2016).
Novoselov, K. S., Mishchenko, A., Carvalho, A. & Castro Neto, A. H. 2D materials and van der Waals heterostructures. Science 353, aac9439 (2016).
Du, L. et al. Engineering symmetry breaking in 2D layered materials. Nat. Rev. Phys. 3, 193–206 (2021).
Du, L. et al. Moiré photonics and optoelectronics. Science 379, eadg0014 (2023).
Rotkin, S. V. & Hess, K. Possibility of a metallic field-effect transistor. Appl. Phys. Lett. 84, 3139–3141 (2004).
Steves, M. A. et al. Unexpected near-infrared to visible nonlinear optical properties from 2-D polar metals. Nano Lett. 20, 8312–8318 (2020).
Jin, K.-H., Oh, E., Stania, R., Liu, F. & Yeom, H. W. Enhanced Berry curvature dipole and persistent spin texture in the Bi(110) monolayer. Nano Lett. 21, 9468–9475 (2021).
Reis, F. et al. Bismuthene on a SiC substrate: a candidate for a high-temperature quantum spin Hall material. Science 357, 287–290 (2017).
Shao, Y. et al. Epitaxial growth of flat antimonene monolayer: a new honeycomb analogue of graphene. Nano Lett. 18, 2133–2139 (2018).
Fang, A. et al. Bursting at the seams: rippled monolayer bismuth on NbSe2. Sci. Adv. 4, eaaq0330 (2018).
Wu, X. et al. Epitaxial growth and air-stability of monolayer antimonene on PdTe2. Adv. Mater. 29, 1605407 (2017).
Huang, L. et al. Intercalation of metal islands and films at the interface of epitaxially grown graphene and Ru(0001) surfaces. Appl. Phys. Lett. 99, 163107 (2011).
Calleja, F. et al. Spatial variation of a giant spin–orbit effect induces electron confinement in graphene on Pb islands. Nat. Phys. 11, 43–47 (2014).
Hussain, N. et al. Ultrathin Bi nanosheets with superior photoluminescence. Small 13, 1701349 (2017).
Li, L. et al. Epitaxy of wafer-scale single-crystal MoS2 monolayer via buffer layer control. Nat. Commun. 15, 1825 (2024).
Jiang, K. et al. Mechanical cleavage of non-van der Waals structures towards two-dimensional crystals. Nat. Synth. 2, 58–66 (2023).
Singh, S. et al. Low-energy phases of Bi monolayer predicted by structure search in two dimensions. J. Phys. Chem. Lett. 10, 7324–7332 (2019).
Lu, Y. et al. Topological properties determined by atomic buckling in self-assembled ultrathin Bi(110). Nano Lett. 15, 80–87 (2015).
Kittel, C. & McEuen, P. Introduction to Solid State Physics (Wiley, 2018).
Sodemann, I. & Fu, L. Quantum nonlinear Hall effect induced by Berry curvature dipole in time-reversal invariant materials. Phys. Rev. Lett. 115, 216806 (2015).
Kang, K., Li, T., Sohn, E., Shan, J. & Mak, K. F. Nonlinear anomalous Hall effect in few-layer WTe2. Nat. Mater. 18, 324–328 (2019).
Ma, Q. et al. Observation of the nonlinear Hall effect under time-reversal-symmetric conditions. Nature 565, 337–342 (2019).
Wu, F. et al. Giant correlated gap and possible room-temperature correlated states in twisted bilayer MoS2. Phys. Rev. Lett. 131, 256201 (2023).
Ma, T. et al. Growth of bilayer MoTe2 single crystals with strong non-linear Hall effect. Nat. Commun. 13, 5465 (2022).
Du, L. et al. Nonlinear physics of moiré superlattices. Nat. Mater. 23, 1179–1192 (2024).
Kumar, D. et al. Room-temperature nonlinear Hall effect and wireless radiofrequency rectification in Weyl semimetal TaIrTe4. Nat. Nanotechnol. 16, 421–425 (2021).
Huang, M. et al. Giant nonlinear Hall effect in twisted bilayer WSe2. Natl Sci. Rev. 10, nwac232 (2022).
Lannin, J. S., Calleja, J. M. & Cardona, M. Second-order Raman scattering in the group-Vb semimetals: Bi, Sb, and As. Phys. Rev. B 12, 585–593 (1975).
Puthirath Balan, A. et al. Exfoliation of a non-van der Waals material from iron ore hematite. Nat. Nanotechnol. 13, 602–609 (2018).
Balan, A. P. et al. Non-van der Waals quasi-2D materials; recent advances in synthesis, emergent properties and applications. Mater. Today 58, 164–200 (2022).
Kresse, G. & Furthmüller, J. Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set. Phys. Rev. B 54, 11169–11186 (1996).
Kresse, G. & Joubert, D. From ultrasoft pseudopotentials to the projector augmented-wave method. Phys. Rev. B 59, 1758–1775 (1999).
Perdew, J. P., Burke, K. & Ernzerhof, M. Generalized gradient approximation made simple. Phys. Rev. Lett. 77, 3865–3868 (1996).
Grimme, S., Antony, J., Ehrlich, S. & Krieg, H. A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu. J. Chem. Phys. 132, 154104 (2010).
