Selected by year

L. Zheng and J. Christensen
“Dirac hierarchy in acoustic topological insulators”
Accepted to Physical Reviews Letters (2021).

B. Hu, Z. Zhang, H. Zhang, L. Zheng, W. Xiong, Z. Yue, X. Wang, J. Xu, Y. Cheng, X. Liu, and J. Christensen
“Non-Hermitian topological whispering gallery”
Accepted to Nature 🤸🏻‍♂️🥳 (2021).

C. Liu, W. Zhao, J. Shi, X. Zhou, C. Ma, R. Peng, M. Wang, Z. H. Hang, J. Christensen, N. X. Fang, and Y. Lai
“A three-dimensional soundproof acoustic metacage”
Physical Review Letters 127, 084301 (2021). [pdf]
Editors’ suggestion.

J. Zhang, W. Rui, C. Ma, Y. Cheng, X. Liu, and J. Christensen
“Remote Whispering Metamaterial: Non-radiative transceiving of ultra-weak sound”
Nature Communications 12, 3670 (2021). [pdf]

P. Gao and J. Christensen
“Topological vortices for sound and light”
Nature Nanotechnology 16, 487 (2021). [pdf]

L. Zheng, X. Zhang, M.-H. Lu, Y.-F. Chen, and J. Christensen
“Knitting topological bands in artificial sonic semimetals”
Materials Today Physics 16, 100299 (2021). [pdf]

M. Rosendo-Lopez, F. Peñaranda, J. Christensen, and P. San-Jose
“Flat bands in magic-angle vibrating plates”
Physical Review Letters 125, 214301 (2020). [pdf]

P. Gao, M. Willatzen, and J. Christensen
“Anomalous topological edge states in non-Hermitian piezophononic media”
Physical Review Letters 125, 206402 (2020). [pdf]

M. Willatzen, P. Gao, J. Christensen, and Z. L. Wang
“Acoustic gain in solids due to piezoelectricity, flexoelectricity, and electrostriction”
Advanced Functional Materials 30, 2003503 (2020). [pdf]

Z. Zhang, B. Hu, F. Liu, Y. Cheng, X. Liu, and J. Christensen
“Pseudospin induced topological corner state at intersecting sonic lattices”
Physical Review B (Rapid Communication) 101, 220102 (2020). [pdf]

P. Gao, Z. Zhang, and J. Christensen
“Sonic valley-Chern insulators”
Physical Review B (Rapid Communication) 101, 020301 (2020). [pdf]

A. Merkel and J. Christensen
“Ultrasonic nodal chains in topological granular metamaterials”
Communications Physics 2, 154 (2019). [pdf]

P. Gao, D. Torrent, F. Cervera, P. San-Jose, J. Sanchez-Dehesa, and J. Christensen
“Majorana-like zero modes in Kekulé distorted sonic lattices”
Physical Review Letters 123, 196601 (2019). [pdf]
Cover story [👌]

C.-W. Chen, N. Lera, R. Chaunsali, D. Torrent, J. V. Alvarez, J. Yang, P. San-Jose, and J. Christensen
“Mechanical analogue of a Majorana bound state”
Advanced Materials 31, 1904386 (2019). [pdf]

M. Rosendo-Lopez, Z. Zhang, D. Torrent, and J. Christensen
“Multiple scattering theory of non-Hermitian sonic second-order topological insulators”
Communications Physics 2, 132 (2019). [pdf]

Z. Zhang, H. Long, C. Liu, C. Shao, Y. Cheng, X. Liu, and J. Christensen
“Deep-subwavelength holey acoustic second-order topological insualators”
Advanced Materials 31, 1904682 (2019). [pdf]
Cover story [👌]

Z. Zhang, M. Rosendo Lopez, Y. Cheng, X. Liu, and J. Christensen
“Non-Hermitian sonic second-order topological insulator”
Physical Review Letters 122, 195501 (2019). [pdf]

X. Zhang, M. Xiao, Y. Cheng, M.-H. Lu, and J. Christensen
“Topological Sound”
Communications Physics 1, 97 (2018). [pdf]

A. Merkel, V. Romero-Garcia, J.-P. Groby, J. Li, and J. Christensen
“Unidirectional zero sonic reflection in passive PT-symmetric Willis media”
Physical Review B (Rapid Communication) 98, 201102 (2018). [pdf]

Z. Zhang, Y. Tian, Y. Wang, S. Gao, Y. Cheng, X. Liu, and J. Christensen
“Directional acoustic antennas based on valley-Hall topological insulators”
Advanced Materials 30, 1803229 (2018). [pdf]

M. Wang, L. Ye, J. Christensen, and Z. Liu
“Valley Physics in non-Hermitian artificial Acoustic Boron Nitride”
Physical Review Letters 120, 246601 (2018). [pdf]

Z. Zhang, Y. Tian, Y. Cheng, X. Liu, and J. Christensen
“Experimental verification of acoustic pseudospin multipoles in a symmetry-broken snowflakelike topological insulator”
Physical Review B (Rapid Communication) 96, 241306 (2017). [pdf]
A figure of this article has been chosen as a PRB Kaleidoscope [image].

K. Bertoldi, V. Vitelli, J. Christensen, and M. van Hecke
“Flexible mechanical metamaterials”
Nature Reviews Materials 2, 17066 (2017). [pdf]
Cover story [👌]

G. Ma, C. Fu, G. Wang, P. del Hougne, J. Christensen, Y. Lai and P. Sheng
“Polarization Bandgaps and Fluid-like Elasticity in Fully Solid Elastic Metamaterials”
Nature Communications 7, 13536 (2016). [pdf]

J. Christensen. M. Willatzen. V. R. Velasco and M.-H. Lu
“Parity-time synthetic phononic media”
Physical Review Letters 116, 207601 (2016). [pdf]

S. A. Cummer, J. Christensen and A. Alu
“Controlling sound with acoustic metamaterials”
Nature Reviews Materials 1, 16001 (2016). [pdf]
Selected by the editor to be free during the APS March Meeting 2018.

V.M. Garcia-Chocano, J. Christensen and J. Sánchez-Dehesa
“Negative refraction and energy funneling by hyperbolic materials: An experimental demonstration in acoustics”
Physical Review Letters 112, 144301 (2014). [pdf]

M. Willatzen, and J. Christensen
“Acoustic gain in piezoelectric semiconductors at ɛ-near-zero response”
Physical Review B (Rapid Communication) 89, 041201 (2014). [pdf]

J. Christensen, Z. Liang, and M. Willatzen
“Metadevices for the confinement of sound and broadband double-negativity behavior”
Physical Review B (Rapid Communication) 88, 100301 (2013). [pdf]
A figure of this article has been chosen as a PRB Kaleidoscope [image].

J. Christensen and F. J. Garcia de Abajo
“Anisotropic metamaterials for full control of acoustic waves”
Physical Review Letters 108, 124301 (2012). [pdf]

J. Zhu*, J. Christensen*, J. Jung, L. Martin-Moreno, X. Yin, L. Fok, F. J. Garcia-Vidal and Xiang Zhang
“A Holey structured metamaterial for acoustic deep subwavelength imaging”
Nature Physics 7, 52 (2011). [pdf] *These authors contributed equally.

J. Christensen and F. J. Garcia de Abajo
“Slow plasmonic slab waveguide as a superlens for visible light”
Physical Review B (Rapid Communication) 82, 161103 (2010). [pdf]

J. Christensen, Martin-Moreno and F. J. Garcia-Vidal,
“Theory of resonant acoustic transmission through subwavelength apertures”
Physical Review Letters 101, 014301 (2008). [pdf]

J. Christensen, A.I. Fernandez-Dominguez, F. de Leon-Perez, L. Martin-Moreno and F. J. Garcia-Vidal
“Collimation of sound assisted by acoustic surface waves”
Nature Physics 3, 851 (2007). [pdf]
Among the research highlights in Nature 450, 4 (2007). [pdf]