scholarly journals Mott-Insulator Phase of Coupled One-Dimensional Atomic Gases in a Two-Dimensional Optical Lattice

2006 ◽  
Vol 96 (4) ◽  
Author(s):  
D. M. Gangardt ◽  
P. Pedri ◽  
L. Santos ◽  
G. V. Shlyapnikov
Keyword(s):  
Optical Lattice ◽  
Mott Insulator ◽  
Atomic Gases ◽  
Two Dimensional ◽  
One Dimensional

scholarly journals Two-dimensional ground-state mapping of a Mott-Hubbard system in a flexible field-effect device

2019 ◽  
Vol 5 (5) ◽  
pp. eaav7282 ◽  
Author(s):  
Yoshitaka Kawasugi ◽  
Kazuhiro Seki ◽  
Satoshi Tajima ◽  
Jiang Pu ◽  
Taishi Takenobu ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Ground State ◽  
Field Effect ◽  
Mott Insulator ◽  
Two Dimensional ◽  
Superconducting Transition ◽  
Microscopic Mechanism ◽  
One Dimensional ◽  
First Order ◽  
Insulating Phase

A Mott insulator sometimes induces unconventional superconductivity in its neighbors when doped and/or pressurized. Because the phase diagram should be strongly related to the microscopic mechanism of the superconductivity, it is important to obtain the global phase diagram surrounding the Mott insulating state. However, the parameter available for controlling the ground state of most Mott insulating materials is one-dimensional owing to technical limitations. Here, we present a two-dimensional ground-state mapping for a Mott insulator using an organic field-effect device by simultaneously tuning the bandwidth and bandfilling. The observed phase diagram showed many unexpected features such as an abrupt first-order superconducting transition under electron doping, a recurrent insulating phase in the heavily electron-doped region, and a nearly constant superconducting transition temperature in a wide parameter range. These results are expected to contribute toward elucidating one of the standard solutions for the Mott-Hubbard model.

scholarly journals One-dimensional phase transitions in a two-dimensional optical lattice

2008 ◽  
Vol 49 (2) ◽  
pp. 223-230 ◽  
Author(s):  
M. Rehn ◽  
S. Bergkvist ◽  
A. Rosengren ◽  
R. Saers ◽  
M. Zelán ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Optical Lattice ◽  
Two Dimensional ◽  
One Dimensional

scholarly journals Transition from a Two-Dimensional Superfluid to a One-Dimensional Mott Insulator

2007 ◽  
Vol 99 (11) ◽  
Author(s):  
Sara Bergkvist ◽  
Anders Rosengren ◽  
Robert Saers ◽  
Emil Lundh ◽  
Magnus Rehn ◽  
...  
Keyword(s):  
Mott Insulator ◽  
Two Dimensional ◽  
One Dimensional
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