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J Phys Condens Matter ; 28(50): 501001, 2016 12 21.
Artigo em Inglês | MEDLINE | ID: mdl-27758978
Phys Rev Lett ; 106(9): 097002, 2011 Mar 04.
Artigo em Inglês | MEDLINE | ID: mdl-21405646


Hidden Fermi liquid theory explicitly accounts for the effects of Gutzwiller projection in the t-J Hamiltonian, widely believed to contain the essential physics of the high-T(c) superconductors. We derive expressions for the entire "strange metal," normal state relating angle-resolved photoemission, resistivity, Hall angle, and by generalizing the formalism to include the Fermi surface topology-angle-dependent magnetoresistance. We show this theory to be the first self-consistent description for the normal state of the cuprates based on transparent, fundamental assumptions. Our well-defined formalism also serves as a guide for further experimental confirmation.

Phys Rev Lett ; 104(17): 176403, 2010 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-20482121


I demonstrate a contradiction which arises if we assume that the Fermi surface in a heavy-electron metal represents a finite jump in occupancy. Therefore it does not and the resulting density of states has a sharp, deep anomaly at the Fermi energy which will appear in vacuum tunneling and many other experiments.

J Phys Condens Matter ; 22(16): 164201, 2010 Apr 28.
Artigo em Inglês | MEDLINE | ID: mdl-21386407


We present a formalism for dealing directly with the effects of the Gutzwiller projection implicit in the t-J model which is widely believed to underlie the phenomenology of the high-T(c) cuprates. We suggest that a true Bardeen-Cooper-Schrieffer condensation from a Fermi liquid state takes place, but in the unphysical space prior to projection. At low doping, however, instead of a hidden Fermi liquid one gets a 'hidden' non-superconducting resonating valence bond state which develops hole pockets upon doping. The theory which results upon projection does not follow conventional rules of diagram theory and in fact in the normal state is a Z = 0 non-Fermi liquid. Anomalous properties of the 'strange metal' normal state are predicted and compared against experimental findings.

Science ; 324(5934): 1515-6, 2009 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-19541975
Science ; 324(5927): 631-2, 2009 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-19407200


Understanding the observations of nonlinear rotational susceptibility in samples of solid helium below temperatures of 1 to 200 millikelvin (mK) has been a subject of some controversy. Here, the observations are conjectured to be describable in terms of a rarified Gross-Pitaevskii superfluid of vacancies, with a transition temperature of about 50 mK, whose density is locally enhanced by crystal imperfections. The observations can be greatly affected by this density enhancement. I argue that every pure Bose solid's ground state is a supersolid.

Science ; 316(5832): 1705-7, 2007 Jun 22.
Artigo em Inglês | MEDLINE | ID: mdl-17588918
Nature ; 437(7059): 625, 2005 Sep 29.
Artigo em Inglês | MEDLINE | ID: mdl-16193027
Science ; 308(5727): 1412-3, 2005 Jun 03.
Artigo em Inglês | MEDLINE | ID: mdl-15933183