» 2nd International Workshop "Towards Room Temperature Superconductivity: Superhydrides and More."

Group picture at the 2nd international workshop

Chapman University was honored to host the 2nd International Workshop "Towards Room Temperature Superconductivity: Superhydrides and More" in May, 2017.

The widespread enthusiasm overflowing from the success of the 1st International Workshop held in Rome 2016, behooved us to band together again in 2017; this time, in Orange, California. To help foster the spirit of progress produced in Italy, we prepared another workshop for a global array of members of the scientific community at Chapman campus for more in-depth discourse. Cooperative contributions from all scientific fields in the search for superconductivity at room temperature (and at any possible pressure) were not only encouraged, but are still considered essential for future discoveries.

Workshop Information

In Recognition of Professor Vitaly Ginzburg

photo of Professor Vitaly GinzburgTo commemorate the centennial of Professor Vitaly Ginzburg, the Institute for Quantum Studies dedicated our colloquium in recognition of both his work and influence as a leading proponent in high temperature superconductivity.

"On the basis of general theoretical considerations, we believe, at present, that the most reasonable estimate is temperature ≤ 300 K; this estimate being, of course, for materials and systems under more or less normal conditions, equilibrium or quasi-equilibrium metallic systems in the absence of pressure, or under relatively low pressures, etc... Furthermore, for the present state of the problem of high-temperature superconductivity, the most sound and fruitful approach will be one that is not pre-conceived, in which attempts are made to move forward in the most diverse directions."

-Vitaly Ginzburg, 2003 Nobel Lecture

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Celebrating the Centennial of Vitaly Ginzburg

Professor Vitaly Ginzburg smilingIn 2006, a different, second international conference called, "Fundamental Problems of High-Temperature Superconductivity" was held in Zvenigorod, Russia, in honor of Professor Vitaly Ginzburg's 90th birthday. Every physicist is familiar with the theory of Ginzburg and Landau, and the superconducting-physics-community still recognizes Ginzburg as one of the leading proponents of high-temperature superconductivity. Unfortunately, because of declining health, Ginzburg was unable to attend; however, he did address the conference with brief remarks, and ultimately wished success to all. No doubts he would have desired the same good fortune for our meeting. 

Moreover, many of Ginzburg's remarks are just as vital today, especially after the discovery of superconductivity in Superhydrides, which is due to the electron-phonon mechanism of pairing. Below, we translate some excerpts from his inspiring address.

To the Participants of the Conference on Superconductivity...

I am involved in the physics of superconductivity already 63 years (since 1943), and have solely one goal: to accelerate the research in that area.

Everybody knows these days that explorations in superconductivity belong to one of the most important directions of fundamental physics. And that there is currently a direct connection of these explorations with the applied physics...

Benefits of practical applications, naturally, are attractive, but they cannot diminish the interest of even the most abstract, as it looks today, scientific problems...

black and white photo of professor Vitaly GinzburgThere is complete discordance in contemporary literature [about the mechanism which is responsible for pairing in high-temperature superconductors], though 20 years have passed since the discovery of HTSC. Complete negligence of electron-phonon interaction (EPI) always seemed the most bizarre to me. One of many possible reasons might have been absence of the isotope effect in regards to temperature. However, this can be explained even with the presence of EPI. Importantly, isotopic replacements have influence on some superconducting samples' properties. While the absence of the isotope effect in the presence of EPI is relatively easy to explain, I have no idea how to explain indications of the isotope effect in absence of EPI...

Thus, I think, that for the known HTSC, EPI plays an important role... This circumstance is important from the point of view of obtaining novel HTSC with possibly higher values of temperature. Indeed, one can hope to raise temperature by changing the structure and the lattice of the material. Discovery of superconductivity in MgB2 with temperature = 40 K, undoubtedly caused by EPI, is important for the same reasoning...

It is important that there are no upper limits on the values of temperature... In brief, we are not aware of any results which prohibit the possibility of reaching room-temperature superconductors. It is another story, that such a task may, undoubtedly, be difficult, and even beyond the reach of contemporary, available facilities. That makes it more interesting, to challenge Nature by trying to create room-temperature superconductors...

I wish success to the conference,

-Vitaly Ginzburg, 23 August 2006

Courtesy of Dr. Ivan Bozovic, please click here to read his article, On Ginzburg, Nobel, and atomic-layer engineering of room temperature superconductors.

Ginzburg posing with Dr. Ivan Bozovic

Organizing Committee

Sir Anthony Leggett, PhD, FRS - Honorary Chair of the Program Committee

Armen Gulian, PhD - Chair of the Program Committee, Director of Advanced Physics Laboratory, Chapman University

Emmanuele Cappelluti, PhD (Italy)

Oleg Dolgov, PhD (Germany)

Jeff Tollaksen, PhD (USA) - Director of Institute for Quantum Studies, Chapman University

Gurgen Melkonyan, PhD (Canada)

Boris Gorshunov, PhD (Russia)

Deborah Van Vechten, PhD (USA)

Cristian Bourgeois - Chair of the Local Organizing Committee

Program Schedule

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8 May 2017

Opening Statements - Armen Gulian, Organizing Committee Chair

Mikhail I. Eremets: News on 203 K superconductivity.

Luciano Pietronero: Conventional/unconventional superconductivity in high pressure hydrides and beyond: Insights from theory and perspectives.

Barry M. Klein: Progress toward the discovery of a room-temperature superconductor: What drives the high Tc of the superhydrides at high pressure, and where do we go from here?

Dimitrios A. Papaconstantopolous: The electron-phonon coupling in light-element hydrides.

Anders Blom: What we can and cannot yet accomplish in search of novel superconductors with QuantumWise.

Fan Zhang: Possible superconductivity above ice point.

L. Z. Deng: Possible interface superconductivity in rare-earth doped CaFe2As2 and undoped CaFe2As2

Jing Xia: Towards room temperature 2D superconductivity at magnetic-semimetal interface.

Armen Gulian: Serendipitous vs. systematic search for room-temperature superconductivity.

Ivan Bozovic: Following V. L. Ginzburg: On the road to room temperature superconductivity.

9 May 2017

T. H. Geballe and Jochen Mannhart: Raising Tc - A different method.

Paul M. Grant: Superconducting fluctuations in one-dimensional quasi-periodic "metallic" chains: The Little model of room temperature superconductivity embodied.

Luciano Ortenzi: Tight binding model and channel like structures in H3S and their implications for the superconducting pairing.

Michael V. Sadovskii: Electronic structure of FeSe monolayers: why Tc is so high?

Sung-Ho Salk: Plausible room temperature superconducting phase transitions based on holon-pair slave-boson theory of antiferromagnetic fluctuations.

Qiang Li: Chiral magnetic effect in condensed matter - A new route for non-dissipative charge transport at room temperature.

Pablo D. Esquinazi: Evidence for superconductivity at room temperature at graphite interfaces.

Xiao-Jia Chen: Superconductivity above 120 K in polyparaphenylene oligomers.

Round Table/Open Discussion

Closing statements and farewell - Armen Gulian, Organizing Committee Chair

Poster Presentations

Noah Bray-Ali: Standard temperature and pressure superconductivity.

Annette Bussman-Holder: Superconductivity at extremely high temperatures: the case of H2S.

I. Kanazawa: Quantized Massive-collective Gauge Fields and Anomalous Properties in high-Tc Cuprates.

Z. S. Khudayberdiev: Anderson metal-insulator transition and pseudogap phenomena in underdoped cuprates.

Milind N. Kunchur: Short-Timescale and Extreme-Dissipation Investigations in superconductors.

Ziad Melhem: New Advancements in superconducting magnets and cryogenic environments for condensed matter research and nanotechnology applications.

Takaki Muramatsu: The possibility of new multiple calcium polyhydride structural phases synthesized under high pressure and high temperature.

G. Melkonyan, M. Gulian, and S. Kasthurirengan: Dielectric Function/Genetic Algorithim Approach to Room-Temperature Superconductivity in Nanomaterials.

Serhii Shafraniuk: Another approach to the problem of room temperature superconductivity.

ChangQing Jin: Development of a symmetric miniature diamond anvil cell for magnetic measurements of superconductors in a SQUID magnetometer.

Kalyan Sasmal: Competing Spin Density Wave & Superconducting order in Electron-doped Sm (O1-xFx)FeAs & Hole-doped (Pr1-xSrx)OFeAs iron-pnictide.

Sara Lopez, Xabier Martinez de Irujo: Superconductivity in MxCu1-xSr2RECu2O7-6 (M = Mo and Fe) cuprates.

O. Paul Isikaku-Ironkwe: MSCD: A rational design framework for searching for room temperature superconductivity.