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Bismuth Doping Alters Structural Phase Transitions in Methylammonium Lead Tribromide Single Crystals

https://doi.org/10.1021/acs.jpclett.1c00334

Jedlicka, Erin; Wang, Jian; Mutch, Joshua; Jung, Young-Kwang; Went, Preston; Mohammed, Joseph; Ziffer, Mark; Giridharagopal, Rajiv; Walsh, Aron; Chu, Jiun-Haw; et al (March 2021, The Journal of Physical Chemistry Letters)
null (Ed.)
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Suppression of superconductivity by anisotropic strain near a nematic quantum critical point

https://doi.org/10.1038/s41567-020-0983-9

Malinowski, Paul; Jiang, Qianni; Sanchez, Joshua J.; Mutch, Joshua; Liu, Zhaoyu; Went, Preston; Liu, Jian; Ryan, Philip J.; Kim, Jong-Woo; Chu, Jiun-Haw (December 2020, Nature Physics)
null (Ed.)
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Apparatus design for measuring of the strain dependence of the Seebeck coefficient of single crystals

https://doi.org/10.1063/1.5127530

Qian, Tiema; Mutch, Joshua; Wu, Lihua; Went, Preston; Jiang, Qianni; Malinowski, Paul; Yang, Jihui; Chu, Jiun-Haw (February 2020, Review of Scientific Instruments)

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Evidence for a strain-tuned topological phase transition in ZrTe ₅

https://doi.org/10.1126/sciadv.aav9771

Mutch, Joshua; Chen, Wei-Chih; Went, Preston; Qian, Tiema; Wilson, Ilham Zaky; Andreev, Anton; Chen, Cheng-Chien; Chu, Jiun-Haw (August 2019, Science Advances)

A phase transition between topologically distinct insulating phases involves closing and reopening the bandgap. Near the topological phase transition, the bulk energy spectrum is characterized by a massive Dirac dispersion, where the bandgap plays the role of mass. We report measurements of strain dependence of electrical transport properties of ZrTe 5 , which is known to host massive Dirac fermions in the bulk due to its proximity to a topological phase transition. We observe that the resistivity exhibits a pronounced minimum at a critical strain. We further find that the positive longitudinal magnetoconductance becomes maximal at the critical strain. This nonmonotonic strain dependence is consistent with the switching of sign of the Dirac mass and, hence, a strain-tuned topological phase transition in ZrTe 5 .
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