Cheng Peng

All Publications

• Superconductivity in the lightly doped Hubbard model on the cylindrical honeycomb lattice PHYSICAL REVIEW B Peng, C., Sheng, D. N., Jiang, H. 2025; 111 (8)

  View details for DOI 10.1103/PhysRevB.111.085108

  View details for Web of Science ID 001423792900009

• Using magnetic dynamics to measure the spin gap in a candidate Kitaev material NPJ QUANTUM MATERIALS Jiang, X., Qiu, Q., Peng, C., Jang, H., Chen, W., Jin, X., Yue, L., Lee, B., Park, S., Kim, M., Kim, H., Cai, X., Li, Q., Dong, T., Wang, N., Turner, J. J., Li, Y., Wang, Y., Peng, Y. 2025; 10 (1)

  View details for DOI 10.1038/s41535-025-00737-8

  View details for Web of Science ID 001412645100001

• Synthesis of Layered Gold Tellurides AuSbTe and Au2Te3 and Their Semiconducting and Metallic Behavior. Inorganic chemistry Pappas, E. A., Zhang, R., Peng, C., Busch, R. T., Zuo, J. M., Devereaux, T. P., Shoemaker, D. P. 2025

  Abstract

  Previous studies on natural samples of pampaloite (AuSbTe) revealed the crystal structure of a potentially cleavable and/or exfoliable material, while studies on natural and synthetic montbrayite (Sb-containing Au2Te3) claimed various chemical compositions for this low-symmetry compound. Few investigations of synthetic samples have been reported for both materials, leaving much of their chemical, thermal, and electronic characteristics unknown. Here, we investigate the stability, electronic properties, and synthesis of the gold antimony tellurides AuSbTe and Au1.9Sb0.46Te2.64 (montbrayite). Differential thermal analysis and in situ powder X-ray diffraction revealed that AuSbTe is incongruently melting, while Au1.9Sb0.46Te2.64 is congruently melting. Calculations of the band structures and four-point resistivity measurements showed that AuSbTe is a semiconductor and Au1.9Sb0.46Te2.64 a metal. Various synthesis attempts confirmed the limited stable chemical composition of Au1.9Sb0.46Te2.64, identified successful methods to synthesize both compounds, and highlighted the challenges associated with single-crystal synthesis of AuSbTe.

  View details for DOI 10.1021/acs.inorgchem.4c04625

  View details for PubMedID 39841906

• Implicit neural representations for experimental steering of advanced experiments CELL REPORTS PHYSICAL SCIENCE Chen, Z., Petsch, A. N., Ji, Z., Chitturi, S. R., Peng, C., Jia, C., Kolesnikov, A. I., Thayer, J. B., Turner, J. J. 2025; 6 (1)

  View details for DOI 10.1016/j.xcrp.2024.102333

  View details for Web of Science ID 001399564000001

• On ultrafast x-ray scattering methods for magnetism ADVANCES IN PHYSICS-X Plumley, R., Chitturi, S. R., Peng, C., Assefa, T. A., Burdet, N., Shen, L., Chen, Z., Reid, A. H., Dakovski, G. L., Seaberg, M. H., O'Dowd, F., Montoya, S. A., Chen, H., Okullo, A., Mardanya, S., Kevan, S. D., Fischer, P., Fullerton, E. E., Sinha, S. K., Colocho, W., Lutman, A., Decker, F., Roy, S., Fujioka, J., Tokura, Y., Minitti, M. P., Johnson, J. A., Hoffmann, M., Amoo, M. E., Feiguin, A., Yoon, C., Thayer, J., Nashed, Y., Jia, C., Bansil, A., Chowdhury, S., Lindenberg, A. M., Dunne, M., Blackburn, E., Turner, J. J. 2024; 9 (1)

  View details for DOI 10.1080/23746149.2024.2423935

  View details for Web of Science ID 001361792300001

• Understanding the superconductivity and charge density wave interaction through quasi-static lattice fluctuations. Proceedings of the National Academy of Sciences of the United States of America Porter, Z., Shen, L., Plumley, R., Burdet, N. G., Petsch, A. N., Wen, J., Drucker, N. C., Peng, C., Chen, X. M., Fluerasu, A., Blackburn, E., Coslovich, G., Hawthorn, D. G., Turner, J. J. 2024; 121 (50): e2412182121

  Abstract

  In unconventional superconductors, coupled charge and lattice degrees of freedom can manifest in ordered phases of matter that are intertwined. In the cuprate family, fluctuating short-range charge correlations can coalesce into a longer-range charge density wave (CDW) order which is thought to intertwine with superconductivity, yet the nature of the interaction is still poorly understood. Here, by measuring subtle lattice fluctuations in underdoped YBa2Cu3O6+y on quasi-static timescales (thousands of seconds) through X-ray photon correlation spectroscopy, we report sensitivity to both superconductivity and CDW. The atomic lattice shows remarkably faster relaxational dynamics upon approaching the superconducting transition at Tc ≈ 65 K. By tracking the momentum dependence, we show that the intermediate scattering function almost monotonically scales with the relaxation distance of atoms away from their average positions above Tc and in the presence of the CDW state, while this peculiar trend is reversed for other temperatures. These observations are consistent with an incipient CDW stabilized by local strain. This work provides insights into the crucial role of relaxational atomic fluctuations for understanding the electronic physics cuprates, which are inherently disordered due to carrier doping.

  View details for DOI 10.1073/pnas.2412182121

  View details for PubMedID 39630858

• 3D Heisenberg universality in the van der Waals antiferromagnet NiPS₃ NPJ QUANTUM MATERIALS Plumley, R., Mardanya, S., Peng, C., Nokelainen, J., Assefa, T., Shen, L., Burdet, N., Porter, Z., Petsch, A., Israelski, A., Chen, H., Lee, J., Morley, S., Roy, S., Fabbris, G., Blackburn, E., Feiguin, A., Bansil, A., Lee, W., Lindenberg, A. M., Chowdhury, S., Dunne, M., Turner, J. J. 2024; 9 (1)

  View details for DOI 10.1038/s41535-024-00696-6

  View details for Web of Science ID 001366178200001

• High-pressure characterization of Ag₃AuTe₂: Implications for strain-induced band tuning APPLIED PHYSICS LETTERS Won, J., Zhang, R., Peng, C., Kumar, R., Gebre, M. S., Popov, D., Hemley, R. J., Bradlyn, B., Devereaux, T. P., Shoemaker, D. P. 2024; 125 (21)

  View details for DOI 10.1063/5.0223472

  View details for Web of Science ID 001360500300018

• Particle-Hole Asymmetric Ferromagnetism and Spin Textures in the Triangular Hubbard-Hofstadter Model PHYSICAL REVIEW X Ding, J. K., Yang, L., Wang, W. O., Zhu, Z., Peng, C., Mai, P., Huang, E. W., Moritz, B., Phillips, P. W., Feldman, B. E., Devereaux, T. P. 2024; 14 (4)

  View details for DOI 10.1103/PhysRevX.14.041025

  View details for Web of Science ID 001345204400001

• Kitaev physics in the two-dimensional magnet NiPSe₃ PHYSICAL REVIEW RESEARCH Peng, C., Mardanya, S., Petsch, A. N., Sharma, V., Li, S., Jia, C., Bansil, A., Chowdhury, S., Turner, J. J. 2024; 6 (3)

  View details for DOI 10.1103/PhysRevResearch.6.033206

  View details for Web of Science ID 001299530700003

• Emergence of antiferromagnetic correlations and Kondolike features in a model for infinite layer nickelates NPJ QUANTUM MATERIALS Liu, F., Peng, C., Huang, E. W., Moritz, B., Jia, C., Devereaux, T. P. 2024; 9 (1)

  View details for DOI 10.1038/s41535-024-00659-x

  View details for Web of Science ID 001243372200001

• Machine learning-empowered study of metastable γ-CsPbI₃ under pressure and strain JOURNAL OF MATERIALS CHEMISTRY A Han, M., Peng, C., Song, R., Ke, F., Nashed, Y. G., Mao, W. L., Jia, C., Lin, Y. 2024

  View details for DOI 10.1039/d4ta00174e

  View details for Web of Science ID 001199652300001

• Exfoliable Transition Metal Chalcogenide Semiconductor NbSe2I2. Inorganic chemistry Qu, K., Zhang, Y., Peng, C., Riedel, Z. W., Won, J., Zhang, R., Woods, T. J., Devereaux, T., van der Zande, A. M., Shoemaker, D. P. 2024

  Abstract

  As the field of exfoliated van der Waals electronics grows to include complex heterostructures, the variety of available in-plane symmetries and geometries becomes increasingly valuable. In this work, we present an efficient chemical vapor transport synthesis of NbSe2I2 with the triclinic space group P1̅. This material contains Nb-Nb dimers and an in-plane crystallographic angle γ = 61.3°. We show that NbSe2I2 can be exfoliated down to few-layer and monolayer structures and use Raman spectroscopy to test the preservation of the crystal structure of exfoliated thin films. The crystal structure was verified by single-crystal and powder X-ray diffraction methods. Density functional theory calculations show triclinic NbSe2I2 to be a semiconductor with a band gap of around 1 eV, with similar band structure features for bulk and monolayer crystals. The physical properties of NbSe2I2 have been characterized by transport, thermal, optical, and magnetic measurements, demonstrating triclinic NbSe2I2 to be a diamagnetic semiconductor that does not exhibit any phase transformation below room temperature.

  View details for DOI 10.1021/acs.inorgchem.3c03493

  View details for PubMedID 38174989

• Charge order and superconductivity in a two-band model for infinite-layer nickelates PHYSICAL REVIEW B Peng, C., Jiang, H., Moritz, B., Devereaux, T. P., Jia, C. 2023; 108 (24)

  View details for DOI 10.1103/PhysRevB.108.245115

  View details for Web of Science ID 001144917900008

• Bayesian experimental design and parameter estimation for ultrafast spin dynamics MACHINE LEARNING-SCIENCE AND TECHNOLOGY Chen, Z., Peng, C., Petsch, A. N., Chitturi, S. R., Okullo, A., Chowdhury, S., Yoon, C., Turner, J. J. 2023; 4 (4)

  View details for DOI 10.1088/2632-2153/ad113a

  View details for Web of Science ID 001126295700001

• Capturing dynamical correlations using implicit neural representations. Nature communications Chitturi, S. R., Ji, Z., Petsch, A. N., Peng, C., Chen, Z., Plumley, R., Dunne, M., Mardanya, S., Chowdhury, S., Chen, H., Bansil, A., Feiguin, A., Kolesnikov, A. I., Prabhakaran, D., Hayden, S. M., Ratner, D., Jia, C., Nashed, Y., Turner, J. J. 2023; 14 (1): 5852

  Abstract

  Understanding the nature and origin of collective excitations in materials is of fundamental importance for unraveling the underlying physics of a many-body system. Excitation spectra are usually obtained by measuring the dynamical structure factor, S(Q, ω), using inelastic neutron or x-ray scattering techniques and are analyzed by comparing the experimental results against calculated predictions. We introduce a data-driven analysis tool which leverages 'neural implicit representations' that are specifically tailored for handling spectrographic measurements and are able to efficiently obtain unknown parameters from experimental data via automatic differentiation. In this work, we employ linear spin wave theory simulations to train a machine learning platform, enabling precise exchange parameter extraction from inelastic neutron scattering data on the square-lattice spin-1 antiferromagnet La2NiO4, showcasing a viable pathway towards automatic refinement of advanced models for ordered magnetic systems.

  View details for DOI 10.1038/s41467-023-41378-4

  View details for PubMedID 37730824

  View details for PubMedCentralID 8662964

• From Stoner to local moment magnetism in atomically thin Cr2Te3. Nature communications Zhong, Y., Peng, C., Huang, H., Guan, D., Hwang, J., Hsu, K. H., Hu, Y., Jia, C., Moritz, B., Lu, D., Lee, J. S., Jia, J. F., Devereaux, T. P., Mo, S. K., Shen, Z. X. 2023; 14 (1): 5340

  Abstract

  The field of two-dimensional (2D) ferromagnetism has been proliferating over the past few years, with ongoing interests in basic science and potential applications in spintronic technology. However, a high-resolution spectroscopic study of the 2D ferromagnet is still lacking due to the small size and air sensitivity of the exfoliated nanoflakes. Here, we report a thickness-dependent ferromagnetism in epitaxially grown Cr2Te3 thin films and investigate the evolution of the underlying electronic structure by synergistic angle-resolved photoemission spectroscopy, scanning tunneling microscopy, x-ray absorption spectroscopy, and first-principle calculations. A conspicuous ferromagnetic transition from Stoner to Heisenberg-type is directly observed in the atomically thin limit, indicating that dimensionality is a powerful tuning knob to manipulate the novel properties of 2D magnetism. Monolayer Cr2Te3 retains robust ferromagnetism, but with a suppressed Curie temperature, due to the drastic drop in the density of states near the Fermi level. Our results establish atomically thin Cr2Te3 as an excellent platform to explore the dual nature of localized and itinerant ferromagnetism in 2D magnets.

  View details for DOI 10.1038/s41467-023-40997-1

  View details for PubMedID 37660171

  View details for PubMedCentralID PMC10475109

• Traces of electron-phonon coupling in one-dimensional cuprates. Nature communications Tang, T., Moritz, B., Peng, C., Shen, Z. X., Devereaux, T. P. 2023; 14 (1): 3129

  Abstract

  The appearance of certain spectral features in one-dimensional (1D) cuprate materials has been attributed to a strong, extended attractive coupling between electrons. Here, using time-dependent density matrix renormalization group methods on a Hubbard-extended Holstein model, we show that extended electron-phonon (e-ph) coupling presents an obvious choice to produce such an attractive interaction that reproduces the observed spectral features and doping dependence seen in angle-resolved photoemission experiments: diminished 3kF spectral weight, prominent spectral intensity of a holon-folding branch, and the correct holon band width. While extended e-ph coupling does not qualitatively alter the ground state of the 1D system compared to the Hubbard model, it quantitatively enhances the long-range superconducting correlations and suppresses spin correlations. Such an extended e-ph interaction may be an important missing ingredient in describing the physics of the structurally similar two-dimensional high-temperature superconducting layered cuprates, which may tip the balance between intertwined orders in favor of uniform d-wave superconductivity.

  View details for DOI 10.1038/s41467-023-38408-6

  View details for PubMedID 37253739

  View details for PubMedCentralID PMC10229634

• Enhanced superconductivity by near-neighbor attraction in the doped extended Hubbard model PHYSICAL REVIEW B Peng, C., Wang, Y., Wen, J., Lee, Y. S., Devereaux, T. P., Jiang, H. 2023; 107 (20)

  View details for DOI 10.1103/PhysRevB.107.L201102

  View details for Web of Science ID 000986820400004

• A Quantum-Inspired Tensor Network Algorithm for Constrained Combinatorial Optimization Problems FRONTIERS IN PHYSICS Hao, T., Huang, X., Jia, C., Peng, C. 2022; 10

  View details for DOI 10.3389/fphy.2022.906590

  View details for Web of Science ID 000837978100001

• Testing the data framework for an AI algorithm in preparation for high data rate X-ray facilities Chen, H., Chitturi, S. R., Plumley, R., Shen, L., Drucker, N. C., Burdet, N., Peng, C., Mardanya, S., Ratner, D., Mishra, A., Yoon, C., Song, S., Chollet, M., Fabbris, G., Dunne, M., Nelson, S., Li, M., Lindenberg, A., Jia, C., Nashed, Y., Bansil, A., Chowdhury, S., Feiguin, A. E., Turner, J. J., Thayer, J. B., IEEE IEEE. 2022: 1-9

  View details for DOI 10.1109/XLOOP56614.2022.00006

  View details for Web of Science ID 000968746500001

• Gapless spin liquid and pair density wave of the Hubbard model on three-leg triangular cylinders NEW JOURNAL OF PHYSICS Peng, C., Jiang, Y., Wang, Y., Jiang, H. 2021; 23 (12)

  View details for DOI 10.1088/1367-2630/ac3a83

  View details for Web of Science ID 000725233200001

• Precursor of pair-density wave in doping Kitaev spin liquid on the honeycomb lattice NPJ QUANTUM MATERIALS Peng, C., Jiang, Y., Devereaux, T. P., Jiang, H. 2021; 6 (1)

  View details for DOI 10.1038/s41535-021-00363-0

  View details for Web of Science ID 000669205300001

• Doping Quantum Spin Liquids on the Kagome Lattice ADVANCED QUANTUM TECHNOLOGIES Peng, C., Jiang, Y., Sheng, D., Jiang, H. 2021

  View details for DOI 10.1002/qute.202000126

  View details for Web of Science ID 000612458300001