Richard L. Greene

About

Richard Greene is known for his many years of productive research on the physics of novel superconducting materials, at the IBM research laboratories and at the University of Maryland. He and his collaborators discovered the first known polymeric and two-dimensional organic superconductors in the 1970s. Since 1986, Dr. Greene has done extensive research on high-Tc superconductors, primarily electron-doped cuprates and iron-based materials. He has written several well-known reviews about these two superconducting systems. He was also involved in the development of the relaxation technique for specific heat measurements, a technique that is now widely used in the Quantum Design PPMS. His publications are very highly cited, with over 33,000 citations and an h-index of 96. He was the founding director of the Center for Superconductivity Research at the University of Maryland in 1989. He is a Fellow of the APS and the AAAS and the APS Dissertation Award for Experimental Condensed Matter Physics is named in his honor. In 2022, he was named a University of Maryland Distinguished University Professor.

Research topics

• Quantum mechanics
• Physics
• Condensed matter physics

Selected publications

• Three-dimensional collective charge excitations in electron-doped copper oxide superconductors

  Nature · 2018-10-30 · 146 citations

  articleOpen access
  PublisherOA PDFDOI

• Perfect Andreev reflection due to the Klein paradox in a topological superconducting state

  Nature · 2019-06-01 · 52 citations

  articleOpen access
  PublisherOA PDFDOI

• Fermi surface reconstruction and anomalous low-temperature resistivity in electron-doped <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">L</mml:mi><mml:msub><mml:mi mathvariant="normal">a</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:mi mathvariant="normal">C</mml:mi><mml:msub><mml:mi mathvariant="normal">e</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:mi>Cu</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

  Physical review. B./Physical review. B · 2017-10-27 · 39 citations

  articleOpen accessSenior author

  We report $ab$-plane Hall-effect and magnetoresistivity measurements on $\mathrm{L}{\mathrm{a}}_{2\ensuremath{-}x}\mathrm{C}{\mathrm{e}}_{x}\mathrm{Cu}{\mathrm{O}}_{4}$ thin films as a function of doping for magnetic fields up to 14 T and temperatures down to 1.8 K. A dramatic change in the low-temperature (1.8 K) normal-state Hall coefficient is found near a doping $\mathrm{Ce}=0.14$. This, along with a nonlinear Hall resistance as a function of magnetic field, suggests that the Fermi surface r…

  PublisherOA PDFDOI

• Thermal diffusivity above the Mott-Ioffe-Regel limit

  Physical review. B./Physical review. B · 2019-12-24 · 34 citations

  articleOpen access

  Understanding transport of charge excitations in strongly correlated electron systems exhibiting the ``strange metal'' state without long-lived quasiparticle excitations has been a long-standing challenge in condensed matter physics. Here, the authors demonstrate that thermal diffusivity, which tracks energy-thermalization processes, exhibits a limiting Planckian relaxation time and a unique thermal diffusion velocity. These reflect both the contribution of phonons and electrons. This result is…

  PublisherOA PDFDOI

• Anomalous quantum criticality in the electron-doped cuprates

  Proceedings of the National Academy of Sciences · 2019-03-12 · 24 citations

  articleOpen accessSenior author

  Significance Understanding the normal state in superconducting cuprates is crucial to the understanding of origin of the superconductivity. It has been conjectured that many properties of the cuprates arise from proximity to a quantum critical doping. Here, by measuring the low-temperature normal-state thermopower in n -type La 2− x Ce x CuO 4 , we observe a quantum critical <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mrow> <mml:mi>S</mml:mi> <mml:…

  PublisherOA PDFDOI

Recent grants

• Emergent Quantum Phenomena in Topological Kondo Insulators

  NSF · $420k · 2014–2018

• Investigation of the Low Temperature Normal State of Electron-Doped Copper Oxides

  NSF · $375k · 2004–2007

• Investigation of the strange metal normal state of electron-doped oxide superconductors

  NSF · $480k · 2020–2024

Frequent coauthors

• T. Venkatesan

  University of Oklahoma

  72 shared

• P. Fournier

  55 shared

• Ichiro Takeuchi

  University of Maryland, College Park

  37 shared

• J. S. Higgins

  University of Pittsburgh

  36 shared

• Amlan Biswas

  31 shared

• V. N. Smolyaninova

  30 shared

• Johnpierre Paglione

  28 shared

• J. L. Peng

  26 shared

Labs

• Greene, Richard - UMD PhysicsPI

Awards & honors

• APS Fellow
• AAAS Fellow
• APS Dissertation Award for Experimental Condensed Matter Phy…
• Kamerlingh Onnes Prize Winner
• University of Maryland Distinguished University Professor

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