Tuning superconductivity in vanadium nitride films by adjusting strain
|Corresponding Author||Cheng，Zhi Gang|
Transition-metal nitrides (TMNs) are enriched with various exotic phenomena such as superconductivity and quantum magnetism. Vanadium nitride (VN) is a typical superconducting TMN, with its superconductivity sensitively associated with various physical and chemical factors including nitrogen vacancies and lattice constants. Strain tuning is a convenient and effective method to manipulate the superconducting behavior of VN in the thin-film form, providing an additional tuning knob for potential applications in quantum computing and passive microwave devices. Here, we demonstrate the effect of strain tuning on VN films both statically and dynamically. By depositing on various substrates, the static strain states of VN films can be controlled from ???4.04% (compressive) to +2.0% (tensile), making the superconducting transition temperature (Tc) tunable by approximately ??10%. Applying in situ dynamic compressive strain via a piezoelectric substrate, we are able to achieve control of Tc by a step as fine as 10 mK. Furthermore, our first-principles calculations point out that the strain-tuning effect of Tc originates from a change in the density of states for vanadium???s d orbitals.
NI Journal Papers
National Key R&D Pro-gram of China["2018YFA0305604","2020YFA0309100"] ; National Natural Science Foundation of China (NSFC)["11874403","11974390","12174428"] ; Beijing Nova Program of Science and Technol-ogy[Z191100001119112] ; Beijing Natural Science Foundation["JQ21002","2202060"]
|WOS Research Area|
Materials Science ; Physics
Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
|WOS Accession No|
|EI Accession Number|
Lattice constants ; Microwave devices ; Nitrides ; Quantum computers ; Quantum optics ; Refractory metal compounds ; Substrates ; Superconducting films ; Superconducting transition temperature ; Thin films ; Transition metals
|ESI Classification Code|
Metallurgy and Metallography:531 ; Electricity: Basic Concepts and Phenomena:701.1 ; Superconducting Materials:708.3 ; Computer Systems and Equipment:722 ; Light/Optics:741.1 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Refractories:812.2 ; Mathematics:921 ; Quantum Theory; Quantum Mechanics:931.4 ; Crystal Lattice:933.1.1
|ESI Research Field|
Web of Science
Cited Times [WOS]:2
|Document Type||Journal Article|
|Department||Department of Physics|
1.Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing,100190,China
2.School of Physical Sciences,University of Chinese Academy of Sciences,Beijing,100049,China
3.Songshan Lake Materials Laboratory,Dongguan,Guangdong,523808,China
4.Department of Physics,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
Zou，Yuting,Jin，Qiao,Wang，Yuxin,et al. Tuning superconductivity in vanadium nitride films by adjusting strain[J]. PHYSICAL REVIEW B,2022,105(22).
Zou，Yuting.,Jin，Qiao.,Wang，Yuxin.,Jiang，Kun.,Wang，Shanmin.,...&Cheng，Zhi Gang.(2022).Tuning superconductivity in vanadium nitride films by adjusting strain.PHYSICAL REVIEW B,105(22).
Zou，Yuting,et al."Tuning superconductivity in vanadium nitride films by adjusting strain".PHYSICAL REVIEW B 105.22(2022).
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