Kosterlitz-Thouless transition inTl2Ba2

D. H. Kim

¹

,

A. M. Goldman

²

,

Joonhee Kang

³

et al.

Kosterlitz-Thouless-Type Transition in a Charge Ordered State of the Layered Organic Conductorα−(BEDT−TTF)2I3Uji1, Kodama2, Sugii3 et al. 2013Phys. Rev. Lett.132190View full textAdd to dashboardCite

“…Because of the lnðrÞ binding potential, the I-V characteristics are expressed in the form V / I . This power law exponent exhibits jumplike behavior from 1 to 3 at T KT with decreasing temperature [7,[9][10][11]15]. Some other evidences of the KT transitions have also been reported [8][9][10]13,14]; however, the interpretation of these transitions is still controversial [12].…”

“…This power law exponent exhibits jumplike behavior from 1 to 3 at T KT with decreasing temperature [7,[9][10][11]15]. Some other evidences of the KT transitions have also been reported [8][9][10]13,14]; however, the interpretation of these transitions is still controversial [12].On the other hand, very few experimental studies have focused on 2D Coulomb gases except for those on Josephson junction arrays although the 2D Coulomb gas has been recognized as another example of a KT system [5]. The primary reason is the lack of relevant model materials; the Coulomb potential exhibits a three-dimensional (3D) form (1=r) in most materials.…”

“…After this theoretical prediction, this type of transition has been extensively investigated in various systems such as 2D XY spin systems [2][3][4], 2D electron gases [5], He 4 superfluids [6], layered (or thin film) superconductors [7][8][9][10][11][12][13][14][15], superconducting networks and Josephson junction arrays [16][17][18][19], and Dirac cone systems [20][21][22]. Above the transition temperature (T KT ), many unbound topological defects are thermally excited, but very few defects below T KT .…”

Mechanism of the Lorentz-force-independent dissipation inBi2Sr2

“…The existence of a power law and the behavior of the power-law exponent give us clues to solve the origin of the dissipation. Studies focused on the KosterlitzThouless (KT) transition have revealed that high-7V oxides show power-law I-V characteristics in the vicinity of the mean-field transition temperature in zero magnetic field [9] or for a field applied parallel to the c axis [10][11][12]. At lower temperatures, nonlinear I-V characteristics are also observed for the field parallel to the c axis [13,14].…”

Disappearance of Hall resistance in one-unit-cell-thickYBa2Cu3<

“…In addition, the problem of how the 2D superconducting sheets achieve the zero-resistance state has been a subject of much interest. Although the Kosterlitz-Thouless (KT) model [3][4][5] has been discussed for bulk samples [6][7][8][9], unknown interlayer coupling makes the interpretation ambiguous. Recently, superconducting transition has been shown to occur at finite temperatures in one-unit-cell-thick (l-UCT) YBCO [10].…”