References on Hole crystals
- Early predictions can be found in B.I. Halperin, and T.M. Rice, Rev. Mod. Phys.
40, 755 (1968)
- Different estimates of the critical mass ratio M (between 50 and 100), have been
published by Alexei Abrikosov, e.g. J. Less-Common Met. 62, 451 (1978).
He also discusses the possibility of superconductivity and increase temperatures
of materials with a hole crystal.
- Large hole to electron mass ratios M (of at least 50) have been realized by the group
of P. Wachter (ETH Zürich), e.g.
B. Bucher, P. Steiner, and P. Wachter, Phys. Rev. Lett. 67, 2717 (1991)
Other papers on hole and proton crystals
- The first prediction of proton crystallization in dense hydrogen was given by
V. Filinov, M. Bonitz and V. Fortov, JETP Letters 72, 245 (2000),
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- A rough estimate of M>20 has been given by M. Saarela, T. Taipaleenmäki, and F. V. Kusmartsev,
J. Phys. A: Math. Gen. 36, 9223 (2003)