Proposed Giaever transformer to probe the pseudogap phase of cuprates

Incoherent pair tunneling in the pseudogap phase of cuprates

“…A similar observation has recently been made in the context of the Nernst effect in the pseudogap phase of underdoped cuprates. 5 Current vertices calculated within a model that reproduces photoemission data in the pseudogap phase 6,7 show an additional temperature dependence, which suppresses the Nernst signal relative to the gaussian result, consistent with experimental data.…”

“…5) is relevant, the pseudogap will still affect the tunneling current through the vertex C. A similar observation has recently been made in the context of the Nernst effect in the pseudogap phase of underdoped cuprates. 5 Calculation of the current vertices within a model 6,7 which reproduces photoemission data in the pseudogap phase leads to an additional T -dependent suppression of the Nernst effect relative to that predicted by the gaussian model, consistent with experimental data. We will now determine if a similar modification occurs for the tunneling current, independent of whether the pseudogap is due to pairing or not.…”

Berezinskii–Kosterlitz–Thouless Transition within the Sine-Gordon Approach: The Role of the Vortex-Core Energy

“…However, the overall interpretation of the experimental data in terms of BKT physics is not so straightforward, despite several theoretical attempts based both on the mapping into the Coulomb-gas problem 38,39 or on numerical simulations for the XY model. 40 On the other hand, a large Nerst effect arises also from the Fermi-surface reconstruction associated to stripe order 41 , or from ordinary GL fluctuations, 42 as observed for example in thin films of conventional superconductors 43 . Moreover, while the SC fluctuations contribution to the diamagnetism seems to fit the BKT behavior of the SC correlation length 36 , the paraconductivity shows usually more direct evidence of GL fluctuations 44,45 .…”

Coulomb drag

“…Mutual friction was also suggested to occur between non-Fermi-Liquid phases including Luttinger liquids (Flensberg, 1998;Klesse and Stern, 2000;Nazarov and Averin, 1998), Wigner crystals (Baker and Rojo, 2001;Braude and Stern, 2001), and strongly localized electrons (Raikh and von Oppen, 2002). Drag or similar measurements of interlayer interactions were also considered for composite (or hybrid) systems comprising ballistic quantum wires Muradov, 2000, 2005;Raichev and Vasilopoulos, 2000a;Wang et al, 2005), coupled 2D-1D systems (Lyo, 2003), nonequilibrium charged gases (Wang and da Cunha Lima, 2001), multi-wall nanotubes (Lunde et al, 2005;Lunde and Jauho, 2004), quantum point contacts (Levchenko and Kamenev, 2008a), few level quantum dots (Moldoveanu and Tanatar, 2009), optical cavities (Berman et al, 2010a(Berman et al, , 2014, coupled mesoscopic rings (Yang and MacDonald, 2001), superconductors (Levchenko and Norman, 2011), and normalmetal-ferromagnet-normal-metal structures . Other developments include mesoscopic fluctuations of Coulomb drag (Narozhny and Aleiner, 2000;Narozhny et al, 2001), frictional drag mediated by virtual photons (Donarini et al, 2003) and plasmons (Badalyan et al, 2007), exciton effects in semiconductors (Laikhtman and Solomon, 2006) and topological insulators (Mink et al, 2012), interlayer Seebeck effect (Lung and Marinescu, 2011) and spin drag (Badalyan and Vignale, 2009;D'Amico and Vignale, 2000;Duine et al, 2011Duine et al, , 2010Duine and Stoof, 2009;Flensberg et al, 2001;…”