Triplet p plus ip pairing correlations in the doped Kane-Mele-Hubbard model: A quantum Monte Carlo study

被引：20

作者：

Ma, Tianxing ^{[1
,2
]}

Lin, Hai-Qing ^{[2
]}

Gubernatis, J. E. ^{[3
]}

机构：

[1] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China

[2] Beijing Computat Sci Res Ctr, Beijing 100094, Peoples R China

[3] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

来源：

EPL | 2015年 / 111卷 / 04期

关键词：

FERMIONS; GAS;

D O I：

10.1209/0295-5075/111/47003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By using the constrained-phase quantum Monte Carlo method, we performed a systematic study of the pairing correlations in the ground state of the doped Kane-Mele-Hubbard model on a honeycomb lattice. We find that pairing correlations with d + id symmetry dominate close to half-filling, but pairing correlations with p + ip symmetry dominate as hole doping moves the system below three-quarters filling. We correlate these behaviors of the pairing correlations with the topology of the Fermi surfaces of the non-interacting problem. We also find that the effective pairing correlation is enhanced greatly as the interaction increases, and these superconducting correlations are robust against varying the spin-orbit coupling strength. Our numerical results suggest a possible way to realize spin triplet superconductivity in doped honeycomb-like materials or ultracold atoms in optical traps. Copyright (C) EPLA, 2015

引用

页数：6

共 47 条

[1] Pinning the Order: The Nature of Quantum Criticality in the Hubbard Model on Honeycomb Lattice [J].

Assaad, Fakher F. ;

Herbut, Igor F. .

PHYSICAL REVIEW X, 2013, 3 (03)

[2] Resonating valence bonds and mean-field d-wave superconductivity in graphite [J].

Black-Schaffer, Annica M. ;

Doniach, Sebastian .

PHYSICAL REVIEW B, 2007, 75 (13)

[3] Two- and One-Dimensional Honeycomb Structures of Silicon and Germanium [J].

Cahangirov, S. ;

Topsakal, M. ;

Akturk, E. ;

Sahin, H. ;

Ciraci, S. .

PHYSICAL REVIEW LETTERS, 2009, 102 (23)

[4] Issues and observations on applications of the constrained-path Monte Carlo method to many-fermion systems [J].

Carlson, J ;

Gubernatis, JE ;

Ortiz, G ;

Zhang, SW .

PHYSICAL REVIEW B, 1999, 59 (20) :12788-12798

[5] Itinerant ferromagnetism in a Fermi gas with contact interaction: Magnetic properties in a dilute Hubbard model [J].

Chang, Chia-Chen ;

Zhang, Shiwei ;

Ceperley, David M. .

PHYSICAL REVIEW A, 2010, 82 (06)

[6] Spin and Charge Order in the Doped Hubbard Model: Long-Wavelength Collective Modes [J].

Chang, Chia-Chen ;

Zhang, Shiwei .

PHYSICAL REVIEW LETTERS, 2010, 104 (11)

[7] Spatially inhomogeneous phase in the two-dimensional repulsive Hubbard model [J].

Chang, Chia-Chen ;

Zhang, Shiwei .

PHYSICAL REVIEW B, 2008, 78 (16)

[8] Quantum phase transitions across a p-wave Feshbach resonance -: art. no. 230403 [J].

Gurarie, V ;

Radzihovsky, L ;

Andreev, AV .

PHYSICAL REVIEW LETTERS, 2005, 94 (23)

[9] Phase diagram of the Kane-Mele-Coulomb model [J].

Hohenadler, M. ;

Toldin, F. Parisen ;

Herbut, I. F. ;

Assaad, F. F. .

PHYSICAL REVIEW B, 2014, 90 (08)

[10] Correlation between dielectric breakdown strength and interface polarization in barium strontium titanate glass ceramics [J].

Huang, Jiajia ;

Zhang, Yong ;

Ma, Tao ;

Li, Hongtao ;

Zhang, Linwen .

APPLIED PHYSICS LETTERS, 2010, 96 (04)

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