Measuring Hall viscosity of graphene’s electron fluid
An electrical conductor subjected to a magnetic field exhibits the Hall effect in the presence of current flow. Here, we report a qualitative deviation from the standard behavior in electron systems with high viscosity. We found that the viscous electron fluid in graphene responds to nonquantizing m...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2019-04, Vol.364 (6436), p.162-165 |
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| creator | Berdyugin, A. I. Xu, S. G. Pellegrino, F. M. D. Kumar, R. Krishna Principi, A. Torre, I. Shalom, M. Ben Taniguchi, T. Watanabe, K. Grigorieva, I. V. Polini, M. Geim, A. K. Bandurin, D. A. |
| description | An electrical conductor subjected to a magnetic field exhibits the Hall effect in the presence of current flow. Here, we report a qualitative deviation from the standard behavior in electron systems with high viscosity. We found that the viscous electron fluid in graphene responds to nonquantizing magnetic fields by producing an electric field opposite to that generated by the ordinary Hall effect. The viscous contribution is substantial and identified by studying local voltages that arise in the vicinity of current-injecting contacts. We analyzed the anomaly over a wide range of temperatures and carrier densities and extracted the Hall viscosity, a dissipationless transport coefficient that was long identified theoretically but remained elusive in experiments. |
| doi_str_mv | 10.1126/science.aau0685 |
| format | Article |
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We analyzed the anomaly over a wide range of temperatures and carrier densities and extracted the Hall viscosity, a dissipationless transport coefficient that was long identified theoretically but remained elusive in experiments.</description><subject>Carrier density</subject><subject>Conductors</subject><subject>Electric conductors</subject><subject>Electric contacts</subject><subject>Electric fields</subject><subject>Electrical resistivity</subject><subject>Electromagnetism</subject><subject>Electron transport</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Graphene</subject><subject>Hall effect</subject><subject>Hydrodynamics</subject><subject>Magnetic fields</subject><subject>Magnetism</subject><subject>Viscosity</subject><issn>0036-8075</issn><issn>1095-9203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNpdkL1OwzAUhS0EglKYmUCRWFja2tc_sUdUAUUqYoE5cpPrkipNip0gdeM1eD2eBKOGDkx3ON89OvoIuWB0zBioSchLrHMcW9tRpeUBGTBq5MgA5YdkQClXI01TeUJOQ1hRGjPDj8kJp5oZA2ZA0ie0ofNlvUxmtqqSjzLkTSjbbdK4ZOnt5g1r_P78CglWmLe-qRNXdWVxRo6crQKe93dIXu_vXqaz0fz54XF6Ox_lQoo2DuEUc7MojDILI3RaADNaK5FKV4DSgknhAEFqhgU4xtE55rgVSFMOGvmQ3Ox6N7557zC02TouxKqyNTZdyIDpVAJQChG9_oeums7XcV0WAQ1cQSwdksmOyn0TgkeXbXy5tn6bMZr9Os16p1nvNH5c9b3dYo3Fnv-TGIHLHbAKbeP3OSglDAjOfwBT4H0h</recordid><startdate>20190412</startdate><enddate>20190412</enddate><creator>Berdyugin, A. 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I. ; Xu, S. G. ; Pellegrino, F. M. D. ; Kumar, R. Krishna ; Principi, A. ; Torre, I. ; Shalom, M. Ben ; Taniguchi, T. ; Watanabe, K. ; Grigorieva, I. V. ; Polini, M. ; Geim, A. K. ; Bandurin, D. 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I.</au><au>Xu, S. G.</au><au>Pellegrino, F. M. D.</au><au>Kumar, R. Krishna</au><au>Principi, A.</au><au>Torre, I.</au><au>Shalom, M. Ben</au><au>Taniguchi, T.</au><au>Watanabe, K.</au><au>Grigorieva, I. V.</au><au>Polini, M.</au><au>Geim, A. K.</au><au>Bandurin, D. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Measuring Hall viscosity of graphene’s electron fluid</atitle><jtitle>Science (American Association for the Advancement of Science)</jtitle><addtitle>Science</addtitle><date>2019-04-12</date><risdate>2019</risdate><volume>364</volume><issue>6436</issue><spage>162</spage><epage>165</epage><pages>162-165</pages><issn>0036-8075</issn><eissn>1095-9203</eissn><abstract>An electrical conductor subjected to a magnetic field exhibits the Hall effect in the presence of current flow. Here, we report a qualitative deviation from the standard behavior in electron systems with high viscosity. 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| source | Science Magazine |
| subjects | Carrier density Conductors Electric conductors Electric contacts Electric fields Electrical resistivity Electromagnetism Electron transport Fluid dynamics Fluid flow Graphene Hall effect Hydrodynamics Magnetic fields Magnetism Viscosity |
| title | Measuring Hall viscosity of graphene’s electron fluid |
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