Control of band structure of FeSe single crystals via biaxial strain

We performed systematic transport measurements on FeSe single crystals with applying in-plane biaxial strain epsilon ranging from -0.96% to 0.23%. Biaxial strain was introduced by firmly gluing samples to various substrate materials with different thermal expansion. With increasing e, structural and superconducting transition temperatures monotonically increased and decreased, respectively. We analyzed magnetotransport results using a compensated three-carrier model. The evaluated densities of hole and electron carriers systematically changed with strain. This indicates that we succeeded in controlling the band structure of single-crystalline FeSe.

Automated summary

The systematic transport measurements on FeSe single crystals with applied in-plane biaxial strain revealed that structural and superconducting transition temperatures show monotonically increasing and decreasing trends with increasing strain, indicating successful control of the band structure of single-crystalline FeSe.